<div class="xblock xblock-public_view xblock-public_view-vertical" data-block-type="vertical" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITX+3.15.1x+2T2017+type@vertical+block@21bbfbc824de451cabf456db0e5e8376" data-course-id="course-v1:MITX+3.15.1x+2T2017" data-has-score="False" data-graded="False" data-runtime-version="1" data-init="VerticalStudentView" data-request-token="7ce9e05e041011efa56f0afff417eba9">
<h2 class="hd hd-2 unit-title">Transistors: Overview</h2>
<div class="vert-mod">
<div class="vert vert-0" data-id="block-v1:MITX+3.15.1x+2T2017+type@video+block@130b6d1dd62d4b3ea17198e346109964">
<div class="xblock xblock-public_view xblock-public_view-video xmodule_display xmodule_VideoBlock" data-block-type="video" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITX+3.15.1x+2T2017+type@video+block@130b6d1dd62d4b3ea17198e346109964" data-course-id="course-v1:MITX+3.15.1x+2T2017" data-has-score="False" data-graded="False" data-runtime-version="1" data-init="XBlockToXModuleShim" data-request-token="7ce9e05e041011efa56f0afff417eba9">
<script type="json/xblock-args" class="xblock-json-init-args">
{"xmodule-type": "Video"}
</script>
<h3 class="hd hd-2">Transistors: Overview</h3>
<div
id="video_130b6d1dd62d4b3ea17198e346109964"
class="video closed"
data-metadata='{"transcriptLanguages": {"en": "English"}, "captionDataDir": null, "autoAdvance": false, "poster": "https://mitx-edx-video-meta-storage.s3.amazonaws.com/media/video-images/8337e999d2634de8a69c9476aff96e72.jpeg?Expires=1714165733&Signature=wvcZ%2F%2FkEQ0bl4FpQyfNVYHZmgyM%3D&x-amz-security-token=IQoJb3JpZ2luX2VjEH0aCXVzLWVhc3QtMSJHMEUCIDY4clmPDbLAbz4EM8cpDRsxvMn%2FaBXnnMbltZftAJZwAiEAilJmm45ugoCHRW8m6YY%2Fry%2BsRtAl2apPwFLI8P3cg0sqwwUIxv%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FARADGgw4NTkyMDU2Mzc0MTEiDI8B4EzWTo5P6GCVFSqXBcB77YdBJEx0jQa1mhCdJNIzVKlncJ%2BhpCs4Xp8%2BPkxZkmiUxq4xEb%2BZrnTCQ1wX7Q0MAM3GBLqPkRhsD0LZXV5mP4hiAGsxs15COXtkco9COPwoURMy7LweySSBs49gevI1CeToOhfhgba5EKmoCTFDkz%2BsE6YigWvFnGSz5wtgb4CNpCT%2FNIq8rN1ckpdh2lE9C2bJDRgQfILYgHoLpPyzQcLQwrw%2BYHjuctpDbd%2FP8R9pfWeV1vEpCH%2FBdWtdSGNc5dHfM%2BeBIKawrDK08%2BBlR1yFf7gN0fxZdtQAfX9psuyn0yspNxibnd9KNbPqmljNO2k35A2EDhcc8sye21Z8Se2d0FbkAIjy4Awy0fj8MwTsZVmkavtUxU%2Ftmg3xHhSgcbKuPkDscq50ADOgYI%2BM6Uu4ACsotPtSh%2Fb54zgEK7mQE4brlQn13d3Ti9%2FPGIfRhruJOQ8Y7gkiPFzNyxJxj4QdG%2Be%2BjLElprpikp8xN4E630vZL%2BSP4fIL3SJ2HNVvd3E%2BHiSSwDXkDX%2BvRLJlA%2FTfvxDMI4FFJdjdkf67T7yXpD7VmIUisa7KQbMQD7ul3rWxthH9u09jlCuaIvHb%2FyAoQ6OF16ArfT4BLCL54vJfuSb2NciVqg1AkXwmxMsLl6bE6fnnEkNRalquiZ8Wv2XgSkimSblGzHbba6RJf9KaUsEcxx4zp%2FpuVr9JaZdsR5kdYdHo97o0JCRc%2BqCYXOhPO0fa2oGY8pOgZwF4MbxP%2FirpKzxBmB4hNsnGRCKaQKtKu825RitYGrDYVFqZ5dlPWMgy3MaLvWeUvKnGjCDd8ba%2FzwycPPUsq5jtAcLl8PZZ0lds8M4bBiWnQruhSQMeBIXpR8SavPfhB%2BpKhlWQ0Mos3TD0obCxBjqxAfW53wsAzlieG0vZZliZCUE%2FgvOD9%2BiDN05rfEQ6rZzVYf60L8p%2B%2Bb8EN9S9y%2B2ASBvi9FYDKfMziNImOFH4RyBsUZrbUU%2BNxpFHknpokbZZEHAfa6kKCBhmomscV4kYV0hbNCOM3rGtzT0B2PIokCeE6hAEvFE%2BpqFWOa52CngJff2xGMQbWciTPLSSPbpHPWborWrmHcElDHgQlWANzaxOKUnKYF2Zs04Z505uiyNF%2Fg%3D%3D&AWSAccessKeyId=ASIA4QDFFSUR7DC3PP4B", "publishCompletionUrl": "/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@130b6d1dd62d4b3ea17198e346109964/handler/publish_completion", "transcriptLanguage": "en", "showCaptions": "true", "completionEnabled": false, "prioritizeHls": false, "sources": ["https://d2f1egay8yehza.cloudfront.net/MIT315XX/MIT315XXT115-V003800_DTH.webm", "https://d2f1egay8yehza.cloudfront.net/MIT315XX/MIT315XXT115-V003800_DTH.mp4", "https://d2f1egay8yehza.cloudfront.net/MIT315XXT115-V003800/MIT315XXT115-V003800.m3u8"], "transcriptAvailableTranslationsUrl": "/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@130b6d1dd62d4b3ea17198e346109964/handler/transcript/available_translations", "ytApiUrl": "https://www.youtube.com/iframe_api", "autohideHtml5": false, "start": 0.0, "generalSpeed": 1.0, "recordedYoutubeIsAvailable": true, "speed": null, "end": 0.0, "ytMetadataEndpoint": "", "savedVideoPosition": 0.0, "ytTestTimeout": 1500, "autoplay": false, "saveStateUrl": "/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@130b6d1dd62d4b3ea17198e346109964/handler/xmodule_handler/save_user_state", "saveStateEnabled": false, "transcriptTranslationUrl": "/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@130b6d1dd62d4b3ea17198e346109964/handler/transcript/translation/__lang__", "streams": "1.00:5AW0C9ZyZ4A", "completionPercentage": 0.95, "duration": 398.8, "lmsRootURL": "https://openlearninglibrary.mit.edu"}'
data-bumper-metadata='null'
data-autoadvance-enabled="False"
data-poster='null'
tabindex="-1"
>
<div class="focus_grabber first"></div>
<div class="tc-wrapper">
<div class="video-wrapper">
<span tabindex="0" class="spinner" aria-hidden="false" aria-label="Loading video player"></span>
<span tabindex="-1" class="btn-play fa fa-youtube-play fa-2x is-hidden" aria-hidden="true" aria-label="Play video"></span>
<div class="video-player-pre"></div>
<div class="video-player">
<div id="130b6d1dd62d4b3ea17198e346109964"></div>
<h4 class="hd hd-4 video-error is-hidden">No playable video sources found.</h4>
<h4 class="hd hd-4 video-hls-error is-hidden">
Your browser does not support this video format. Try using a different browser.
</h4>
</div>
<div class="video-player-post"></div>
<div class="closed-captions"></div>
<div class="video-controls is-hidden">
<div>
<div class="vcr"><div class="vidtime">0:00 / 0:00</div></div>
<div class="secondary-controls"></div>
</div>
</div>
</div>
</div>
<div class="focus_grabber last"></div>
<h3 class="hd hd-4 downloads-heading sr" id="video-download-transcripts_130b6d1dd62d4b3ea17198e346109964">Downloads and transcripts</h3>
<div class="wrapper-downloads" role="region" aria-labelledby="video-download-transcripts_130b6d1dd62d4b3ea17198e346109964">
<div class="wrapper-download-transcripts">
<h4 class="hd hd-5">Transcripts</h4>
<ul class="list-download-transcripts">
<li class="transcript-option">
<a class="btn btn-link" href="/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@130b6d1dd62d4b3ea17198e346109964/handler/transcript/download" data-value="srt">Download SubRip (.srt) file</a>
</li>
<li class="transcript-option">
<a class="btn btn-link" href="/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@130b6d1dd62d4b3ea17198e346109964/handler/transcript/download" data-value="txt">Download Text (.txt) file</a>
</li>
</ul>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="xblock xblock-public_view xblock-public_view-vertical" data-block-type="vertical" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITX+3.15.1x+2T2017+type@vertical+block@bc2e69715035441789dd25231db1a1c7" data-course-id="course-v1:MITX+3.15.1x+2T2017" data-has-score="False" data-graded="False" data-runtime-version="1" data-init="VerticalStudentView" data-request-token="7ce9e05e041011efa56f0afff417eba9">
<h2 class="hd hd-2 unit-title">The Bipolar Junction Transistor</h2>
<div class="vert-mod">
<div class="vert vert-0" data-id="block-v1:MITX+3.15.1x+2T2017+type@video+block@ef19ca3fe2bd4e71b18411699e8df72a">
<div class="xblock xblock-public_view xblock-public_view-video xmodule_display xmodule_VideoBlock" data-block-type="video" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITX+3.15.1x+2T2017+type@video+block@ef19ca3fe2bd4e71b18411699e8df72a" data-course-id="course-v1:MITX+3.15.1x+2T2017" data-has-score="False" data-graded="False" data-runtime-version="1" data-init="XBlockToXModuleShim" data-request-token="7ce9e05e041011efa56f0afff417eba9">
<script type="json/xblock-args" class="xblock-json-init-args">
{"xmodule-type": "Video"}
</script>
<h3 class="hd hd-2">The Bipolar Junction Transistor</h3>
<div
id="video_ef19ca3fe2bd4e71b18411699e8df72a"
class="video closed"
data-metadata='{"transcriptLanguages": {"en": "English"}, "captionDataDir": null, "autoAdvance": false, "poster": "https://mitx-edx-video-meta-storage.s3.amazonaws.com/media/video-images/e02fd042dfeb473ebf8f01ff2f187151.jpeg?Expires=1714165734&Signature=L59N1sDICVnnRda9alYCcgQ3BRw%3D&x-amz-security-token=IQoJb3JpZ2luX2VjEH0aCXVzLWVhc3QtMSJHMEUCIDY4clmPDbLAbz4EM8cpDRsxvMn%2FaBXnnMbltZftAJZwAiEAilJmm45ugoCHRW8m6YY%2Fry%2BsRtAl2apPwFLI8P3cg0sqwwUIxv%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FARADGgw4NTkyMDU2Mzc0MTEiDI8B4EzWTo5P6GCVFSqXBcB77YdBJEx0jQa1mhCdJNIzVKlncJ%2BhpCs4Xp8%2BPkxZkmiUxq4xEb%2BZrnTCQ1wX7Q0MAM3GBLqPkRhsD0LZXV5mP4hiAGsxs15COXtkco9COPwoURMy7LweySSBs49gevI1CeToOhfhgba5EKmoCTFDkz%2BsE6YigWvFnGSz5wtgb4CNpCT%2FNIq8rN1ckpdh2lE9C2bJDRgQfILYgHoLpPyzQcLQwrw%2BYHjuctpDbd%2FP8R9pfWeV1vEpCH%2FBdWtdSGNc5dHfM%2BeBIKawrDK08%2BBlR1yFf7gN0fxZdtQAfX9psuyn0yspNxibnd9KNbPqmljNO2k35A2EDhcc8sye21Z8Se2d0FbkAIjy4Awy0fj8MwTsZVmkavtUxU%2Ftmg3xHhSgcbKuPkDscq50ADOgYI%2BM6Uu4ACsotPtSh%2Fb54zgEK7mQE4brlQn13d3Ti9%2FPGIfRhruJOQ8Y7gkiPFzNyxJxj4QdG%2Be%2BjLElprpikp8xN4E630vZL%2BSP4fIL3SJ2HNVvd3E%2BHiSSwDXkDX%2BvRLJlA%2FTfvxDMI4FFJdjdkf67T7yXpD7VmIUisa7KQbMQD7ul3rWxthH9u09jlCuaIvHb%2FyAoQ6OF16ArfT4BLCL54vJfuSb2NciVqg1AkXwmxMsLl6bE6fnnEkNRalquiZ8Wv2XgSkimSblGzHbba6RJf9KaUsEcxx4zp%2FpuVr9JaZdsR5kdYdHo97o0JCRc%2BqCYXOhPO0fa2oGY8pOgZwF4MbxP%2FirpKzxBmB4hNsnGRCKaQKtKu825RitYGrDYVFqZ5dlPWMgy3MaLvWeUvKnGjCDd8ba%2FzwycPPUsq5jtAcLl8PZZ0lds8M4bBiWnQruhSQMeBIXpR8SavPfhB%2BpKhlWQ0Mos3TD0obCxBjqxAfW53wsAzlieG0vZZliZCUE%2FgvOD9%2BiDN05rfEQ6rZzVYf60L8p%2B%2Bb8EN9S9y%2B2ASBvi9FYDKfMziNImOFH4RyBsUZrbUU%2BNxpFHknpokbZZEHAfa6kKCBhmomscV4kYV0hbNCOM3rGtzT0B2PIokCeE6hAEvFE%2BpqFWOa52CngJff2xGMQbWciTPLSSPbpHPWborWrmHcElDHgQlWANzaxOKUnKYF2Zs04Z505uiyNF%2Fg%3D%3D&AWSAccessKeyId=ASIA4QDFFSUR7DC3PP4B", "publishCompletionUrl": "/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@ef19ca3fe2bd4e71b18411699e8df72a/handler/publish_completion", "transcriptLanguage": "en", "showCaptions": "true", "completionEnabled": false, "prioritizeHls": false, "sources": ["https://d2f1egay8yehza.cloudfront.net/MIT315XX/MIT315XXT115-V002400_DTH.webm", "https://d2f1egay8yehza.cloudfront.net/MIT315XX/MIT315XXT115-V002400_DTH.mp4", "https://d2f1egay8yehza.cloudfront.net/MIT315XXT115-V002400/MIT315XXT115-V002400.m3u8"], "transcriptAvailableTranslationsUrl": "/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@ef19ca3fe2bd4e71b18411699e8df72a/handler/transcript/available_translations", "ytApiUrl": "https://www.youtube.com/iframe_api", "autohideHtml5": false, "start": 0.0, "generalSpeed": 1.0, "recordedYoutubeIsAvailable": true, "speed": null, "end": 0.0, "ytMetadataEndpoint": "", "savedVideoPosition": 0.0, "ytTestTimeout": 1500, "autoplay": false, "saveStateUrl": "/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@ef19ca3fe2bd4e71b18411699e8df72a/handler/xmodule_handler/save_user_state", "saveStateEnabled": false, "transcriptTranslationUrl": "/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@ef19ca3fe2bd4e71b18411699e8df72a/handler/transcript/translation/__lang__", "streams": "1.00:WrrN7_J6U2Y", "completionPercentage": 0.95, "duration": 466.93, "lmsRootURL": "https://openlearninglibrary.mit.edu"}'
data-bumper-metadata='null'
data-autoadvance-enabled="False"
data-poster='null'
tabindex="-1"
>
<div class="focus_grabber first"></div>
<div class="tc-wrapper">
<div class="video-wrapper">
<span tabindex="0" class="spinner" aria-hidden="false" aria-label="Loading video player"></span>
<span tabindex="-1" class="btn-play fa fa-youtube-play fa-2x is-hidden" aria-hidden="true" aria-label="Play video"></span>
<div class="video-player-pre"></div>
<div class="video-player">
<div id="ef19ca3fe2bd4e71b18411699e8df72a"></div>
<h4 class="hd hd-4 video-error is-hidden">No playable video sources found.</h4>
<h4 class="hd hd-4 video-hls-error is-hidden">
Your browser does not support this video format. Try using a different browser.
</h4>
</div>
<div class="video-player-post"></div>
<div class="closed-captions"></div>
<div class="video-controls is-hidden">
<div>
<div class="vcr"><div class="vidtime">0:00 / 0:00</div></div>
<div class="secondary-controls"></div>
</div>
</div>
</div>
</div>
<div class="focus_grabber last"></div>
<h3 class="hd hd-4 downloads-heading sr" id="video-download-transcripts_ef19ca3fe2bd4e71b18411699e8df72a">Downloads and transcripts</h3>
<div class="wrapper-downloads" role="region" aria-labelledby="video-download-transcripts_ef19ca3fe2bd4e71b18411699e8df72a">
<div class="wrapper-download-transcripts">
<h4 class="hd hd-5">Transcripts</h4>
<ul class="list-download-transcripts">
<li class="transcript-option">
<a class="btn btn-link" href="/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@ef19ca3fe2bd4e71b18411699e8df72a/handler/transcript/download" data-value="srt">Download SubRip (.srt) file</a>
</li>
<li class="transcript-option">
<a class="btn btn-link" href="/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@ef19ca3fe2bd4e71b18411699e8df72a/handler/transcript/download" data-value="txt">Download Text (.txt) file</a>
</li>
</ul>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="xblock xblock-public_view xblock-public_view-vertical" data-block-type="vertical" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITX+3.15.1x+2T2017+type@vertical+block@0c6b5ef635954b3483d622fe4c3b5274" data-course-id="course-v1:MITX+3.15.1x+2T2017" data-has-score="False" data-graded="False" data-runtime-version="1" data-init="VerticalStudentView" data-request-token="7ce9e05e041011efa56f0afff417eba9">
<h2 class="hd hd-2 unit-title">In-Lecture Question 4.1</h2>
<div class="vert-mod">
<div class="vert vert-0" data-id="block-v1:MITX+3.15.1x+2T2017+type@problem+block@281b6b2762e04d16860bd2584f9c0bc3">
<div class="xblock xblock-public_view xblock-public_view-problem xmodule_display xmodule_ProblemBlock" data-block-type="problem" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITX+3.15.1x+2T2017+type@problem+block@281b6b2762e04d16860bd2584f9c0bc3" data-course-id="course-v1:MITX+3.15.1x+2T2017" data-has-score="True" data-graded="False" data-runtime-version="1" data-init="XBlockToXModuleShim" data-request-token="7ce9e05e041011efa56f0afff417eba9">
<script type="json/xblock-args" class="xblock-json-init-args">
{"xmodule-type": "Problem"}
</script>
<div id="problem_281b6b2762e04d16860bd2584f9c0bc3" class="problems-wrapper" role="group"
aria-labelledby="281b6b2762e04d16860bd2584f9c0bc3-problem-title"
data-problem-id="block-v1:MITX+3.15.1x+2T2017+type@problem+block@281b6b2762e04d16860bd2584f9c0bc3" data-url="/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@problem+block@281b6b2762e04d16860bd2584f9c0bc3/handler/xmodule_handler"
data-problem-score="0"
data-problem-total-possible="0"
data-attempts-used="0"
data-content="
<h3 class="hd hd-3 problem-header" id="281b6b2762e04d16860bd2584f9c0bc3-problem-title" aria-describedby="block-v1:MITX+3.15.1x+2T2017+type@problem+block@281b6b2762e04d16860bd2584f9c0bc3-problem-progress" tabindex="-1">
In-Lecture Question 4.1
</h3>
<div class="problem-progress" id="block-v1:MITX+3.15.1x+2T2017+type@problem+block@281b6b2762e04d16860bd2584f9c0bc3-problem-progress"></div>
<div class="problem">
<div>
<span id="anchor_change_my_id_for_each_one_on_the_page"/>
<script type="text/javascript">
/* The object here is to replace the single line input with a textarea */
(function() {
var elem = $("#anchor_change_my_id_for_each_one_on_the_page")
.closest("div.problem")
.find(":text");
/* There's CSS in the LMS that controls the height, so we have to override here */
var textarea = $('<textarea style="height:150px" rows="20" cols="70"/>');
console.log(elem);
console.log(textarea);
//This is just a way to do an iterator in JS
for (attrib in {'id':null, 'name':null}) {
textarea.attr(attrib, elem.attr(attrib));
}
/* copy over the submitted value */
textarea.val(elem.val())
elem.replaceWith(textarea);
})();
</script>
<p>Explain why a BJT is fundamentally different from a pair of pn junctions connected together with a wire?</p>
<div class="wrapper-problem-response" tabindex="-1" aria-label="Question 1" role="group"><div id="inputtype_281b6b2762e04d16860bd2584f9c0bc3_2_1" class=" capa_inputtype textline">
<div class="unanswered ">
<input type="text" name="input_281b6b2762e04d16860bd2584f9c0bc3_2_1" id="input_281b6b2762e04d16860bd2584f9c0bc3_2_1" aria-describedby="status_281b6b2762e04d16860bd2584f9c0bc3_2_1" value=""/>
<span class="trailing_text" id="trailing_text_281b6b2762e04d16860bd2584f9c0bc3_2_1"/>
<span class="status unanswered" id="status_281b6b2762e04d16860bd2584f9c0bc3_2_1" data-tooltip="Not yet answered.">
<span class="sr">unanswered</span><span class="status-icon" aria-hidden="true"/>
</span>
<p id="answer_281b6b2762e04d16860bd2584f9c0bc3_2_1" class="answer"/>
</div>
</div></div>
<div class="solution-span">
<span id="solution_281b6b2762e04d16860bd2584f9c0bc3_solution_1"/>
</div></div>
<div class="action">
<input type="hidden" name="problem_id" value="In-Lecture Question 4.1" />
<div class="submit-attempt-container">
<button type="button" class="submit btn-brand" data-submitting="Submitting" data-value="Submit" data-should-enable-submit-button="True" aria-describedby="submission_feedback_281b6b2762e04d16860bd2584f9c0bc3" >
<span class="submit-label">Submit</span>
</button>
<div class="submission-feedback" id="submission_feedback_281b6b2762e04d16860bd2584f9c0bc3">
<span class="sr">Some problems have options such as save, reset, hints, or show answer. These options follow the Submit button.</span>
</div>
</div>
<div class="problem-action-buttons-wrapper">
</div>
</div>
<div class="notification warning notification-gentle-alert
is-hidden"
tabindex="-1">
<span class="icon fa fa-exclamation-circle" aria-hidden="true"></span>
<span class="notification-message" aria-describedby="281b6b2762e04d16860bd2584f9c0bc3-problem-title">
</span>
<div class="notification-btn-wrapper">
<button type="button" class="btn btn-default btn-small notification-btn review-btn sr">Review</button>
</div>
</div>
<div class="notification warning notification-save
is-hidden"
tabindex="-1">
<span class="icon fa fa-save" aria-hidden="true"></span>
<span class="notification-message" aria-describedby="281b6b2762e04d16860bd2584f9c0bc3-problem-title">None
</span>
<div class="notification-btn-wrapper">
<button type="button" class="btn btn-default btn-small notification-btn review-btn sr">Review</button>
</div>
</div>
<div class="notification general notification-show-answer
is-hidden"
tabindex="-1">
<span class="icon fa fa-info-circle" aria-hidden="true"></span>
<span class="notification-message" aria-describedby="281b6b2762e04d16860bd2584f9c0bc3-problem-title">Answers are displayed within the problem
</span>
<div class="notification-btn-wrapper">
<button type="button" class="btn btn-default btn-small notification-btn review-btn sr">Review</button>
</div>
</div>
</div>
"
data-graded="False">
<p class="loading-spinner">
<i class="fa fa-spinner fa-pulse fa-2x fa-fw"></i>
<span class="sr">Loading…</span>
</p>
</div>
</div>
</div>
</div>
</div>
<div class="xblock xblock-public_view xblock-public_view-vertical" data-block-type="vertical" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITX+3.15.1x+2T2017+type@vertical+block@3f967f0f0e9845388f4414a6c2bcb273" data-course-id="course-v1:MITX+3.15.1x+2T2017" data-has-score="False" data-graded="False" data-runtime-version="1" data-init="VerticalStudentView" data-request-token="7ce9e05e041011efa56f0afff417eba9">
<h2 class="hd hd-2 unit-title">The BJT: Forward Active Mode</h2>
<div class="vert-mod">
<div class="vert vert-0" data-id="block-v1:MITX+3.15.1x+2T2017+type@video+block@84ab01451e3c486eba9a7cd921e493a6">
<div class="xblock xblock-public_view xblock-public_view-video xmodule_display xmodule_VideoBlock" data-block-type="video" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITX+3.15.1x+2T2017+type@video+block@84ab01451e3c486eba9a7cd921e493a6" data-course-id="course-v1:MITX+3.15.1x+2T2017" data-has-score="False" data-graded="False" data-runtime-version="1" data-init="XBlockToXModuleShim" data-request-token="7ce9e05e041011efa56f0afff417eba9">
<script type="json/xblock-args" class="xblock-json-init-args">
{"xmodule-type": "Video"}
</script>
<h3 class="hd hd-2">The BJT: Forward Active Mode</h3>
<div
id="video_84ab01451e3c486eba9a7cd921e493a6"
class="video closed"
data-metadata='{"transcriptLanguages": {"en": "English"}, "captionDataDir": null, "autoAdvance": false, "poster": "https://mitx-edx-video-meta-storage.s3.amazonaws.com/media/video-images/6a2d6f99a0cd45b9a98fe619cabec4b7.jpeg?Expires=1714165734&Signature=KKksSrcxp6StqISlvVRsByJtCYQ%3D&x-amz-security-token=IQoJb3JpZ2luX2VjEH0aCXVzLWVhc3QtMSJHMEUCIDY4clmPDbLAbz4EM8cpDRsxvMn%2FaBXnnMbltZftAJZwAiEAilJmm45ugoCHRW8m6YY%2Fry%2BsRtAl2apPwFLI8P3cg0sqwwUIxv%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FARADGgw4NTkyMDU2Mzc0MTEiDI8B4EzWTo5P6GCVFSqXBcB77YdBJEx0jQa1mhCdJNIzVKlncJ%2BhpCs4Xp8%2BPkxZkmiUxq4xEb%2BZrnTCQ1wX7Q0MAM3GBLqPkRhsD0LZXV5mP4hiAGsxs15COXtkco9COPwoURMy7LweySSBs49gevI1CeToOhfhgba5EKmoCTFDkz%2BsE6YigWvFnGSz5wtgb4CNpCT%2FNIq8rN1ckpdh2lE9C2bJDRgQfILYgHoLpPyzQcLQwrw%2BYHjuctpDbd%2FP8R9pfWeV1vEpCH%2FBdWtdSGNc5dHfM%2BeBIKawrDK08%2BBlR1yFf7gN0fxZdtQAfX9psuyn0yspNxibnd9KNbPqmljNO2k35A2EDhcc8sye21Z8Se2d0FbkAIjy4Awy0fj8MwTsZVmkavtUxU%2Ftmg3xHhSgcbKuPkDscq50ADOgYI%2BM6Uu4ACsotPtSh%2Fb54zgEK7mQE4brlQn13d3Ti9%2FPGIfRhruJOQ8Y7gkiPFzNyxJxj4QdG%2Be%2BjLElprpikp8xN4E630vZL%2BSP4fIL3SJ2HNVvd3E%2BHiSSwDXkDX%2BvRLJlA%2FTfvxDMI4FFJdjdkf67T7yXpD7VmIUisa7KQbMQD7ul3rWxthH9u09jlCuaIvHb%2FyAoQ6OF16ArfT4BLCL54vJfuSb2NciVqg1AkXwmxMsLl6bE6fnnEkNRalquiZ8Wv2XgSkimSblGzHbba6RJf9KaUsEcxx4zp%2FpuVr9JaZdsR5kdYdHo97o0JCRc%2BqCYXOhPO0fa2oGY8pOgZwF4MbxP%2FirpKzxBmB4hNsnGRCKaQKtKu825RitYGrDYVFqZ5dlPWMgy3MaLvWeUvKnGjCDd8ba%2FzwycPPUsq5jtAcLl8PZZ0lds8M4bBiWnQruhSQMeBIXpR8SavPfhB%2BpKhlWQ0Mos3TD0obCxBjqxAfW53wsAzlieG0vZZliZCUE%2FgvOD9%2BiDN05rfEQ6rZzVYf60L8p%2B%2Bb8EN9S9y%2B2ASBvi9FYDKfMziNImOFH4RyBsUZrbUU%2BNxpFHknpokbZZEHAfa6kKCBhmomscV4kYV0hbNCOM3rGtzT0B2PIokCeE6hAEvFE%2BpqFWOa52CngJff2xGMQbWciTPLSSPbpHPWborWrmHcElDHgQlWANzaxOKUnKYF2Zs04Z505uiyNF%2Fg%3D%3D&AWSAccessKeyId=ASIA4QDFFSUR7DC3PP4B", "publishCompletionUrl": "/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@84ab01451e3c486eba9a7cd921e493a6/handler/publish_completion", "transcriptLanguage": "en", "showCaptions": "true", "completionEnabled": false, "prioritizeHls": false, "sources": ["https://d2f1egay8yehza.cloudfront.net/MIT315XX/MIT315XXT115-V002500_DTH.webm", "https://d2f1egay8yehza.cloudfront.net/MIT315XX/MIT315XXT115-V002500_DTH.mp4", "https://d2f1egay8yehza.cloudfront.net/MIT315XXT115-V002500/MIT315XXT115-V002500.m3u8"], "transcriptAvailableTranslationsUrl": "/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@84ab01451e3c486eba9a7cd921e493a6/handler/transcript/available_translations", "ytApiUrl": "https://www.youtube.com/iframe_api", "autohideHtml5": false, "start": 0.0, "generalSpeed": 1.0, "recordedYoutubeIsAvailable": true, "speed": null, "end": 0.0, "ytMetadataEndpoint": "", "savedVideoPosition": 0.0, "ytTestTimeout": 1500, "autoplay": false, "saveStateUrl": "/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@84ab01451e3c486eba9a7cd921e493a6/handler/xmodule_handler/save_user_state", "saveStateEnabled": false, "transcriptTranslationUrl": "/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@84ab01451e3c486eba9a7cd921e493a6/handler/transcript/translation/__lang__", "streams": "1.00:9mZmiv-O30E", "completionPercentage": 0.95, "duration": 519.83, "lmsRootURL": "https://openlearninglibrary.mit.edu"}'
data-bumper-metadata='null'
data-autoadvance-enabled="False"
data-poster='null'
tabindex="-1"
>
<div class="focus_grabber first"></div>
<div class="tc-wrapper">
<div class="video-wrapper">
<span tabindex="0" class="spinner" aria-hidden="false" aria-label="Loading video player"></span>
<span tabindex="-1" class="btn-play fa fa-youtube-play fa-2x is-hidden" aria-hidden="true" aria-label="Play video"></span>
<div class="video-player-pre"></div>
<div class="video-player">
<div id="84ab01451e3c486eba9a7cd921e493a6"></div>
<h4 class="hd hd-4 video-error is-hidden">No playable video sources found.</h4>
<h4 class="hd hd-4 video-hls-error is-hidden">
Your browser does not support this video format. Try using a different browser.
</h4>
</div>
<div class="video-player-post"></div>
<div class="closed-captions"></div>
<div class="video-controls is-hidden">
<div>
<div class="vcr"><div class="vidtime">0:00 / 0:00</div></div>
<div class="secondary-controls"></div>
</div>
</div>
</div>
</div>
<div class="focus_grabber last"></div>
<h3 class="hd hd-4 downloads-heading sr" id="video-download-transcripts_84ab01451e3c486eba9a7cd921e493a6">Downloads and transcripts</h3>
<div class="wrapper-downloads" role="region" aria-labelledby="video-download-transcripts_84ab01451e3c486eba9a7cd921e493a6">
<div class="wrapper-download-transcripts">
<h4 class="hd hd-5">Transcripts</h4>
<ul class="list-download-transcripts">
<li class="transcript-option">
<a class="btn btn-link" href="/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@84ab01451e3c486eba9a7cd921e493a6/handler/transcript/download" data-value="srt">Download SubRip (.srt) file</a>
</li>
<li class="transcript-option">
<a class="btn btn-link" href="/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@84ab01451e3c486eba9a7cd921e493a6/handler/transcript/download" data-value="txt">Download Text (.txt) file</a>
</li>
</ul>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="xblock xblock-public_view xblock-public_view-vertical" data-block-type="vertical" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITX+3.15.1x+2T2017+type@vertical+block@139d95930aaa405490275d9f7fac8e72" data-course-id="course-v1:MITX+3.15.1x+2T2017" data-has-score="False" data-graded="False" data-runtime-version="1" data-init="VerticalStudentView" data-request-token="7ce9e05e041011efa56f0afff417eba9">
<h2 class="hd hd-2 unit-title">The BJT: Currents in Forward Active Mode</h2>
<div class="vert-mod">
<div class="vert vert-0" data-id="block-v1:MITX+3.15.1x+2T2017+type@video+block@1ae3468dbf0b43b4a2f51b14d6ad45ef">
<div class="xblock xblock-public_view xblock-public_view-video xmodule_display xmodule_VideoBlock" data-block-type="video" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITX+3.15.1x+2T2017+type@video+block@1ae3468dbf0b43b4a2f51b14d6ad45ef" data-course-id="course-v1:MITX+3.15.1x+2T2017" data-has-score="False" data-graded="False" data-runtime-version="1" data-init="XBlockToXModuleShim" data-request-token="7ce9e05e041011efa56f0afff417eba9">
<script type="json/xblock-args" class="xblock-json-init-args">
{"xmodule-type": "Video"}
</script>
<h3 class="hd hd-2">The BJT: Currents in Forward Active Mode</h3>
<div
id="video_1ae3468dbf0b43b4a2f51b14d6ad45ef"
class="video closed"
data-metadata='{"transcriptLanguages": {"en": "English"}, "captionDataDir": null, "autoAdvance": false, "poster": "https://mitx-edx-video-meta-storage.s3.amazonaws.com/media/video-images/1f31d3e933be476a8f999d863cbc5bf3.jpeg?Expires=1714165734&Signature=tC3lQ2uDSCA7JXoKBnbbyxn539Q%3D&x-amz-security-token=IQoJb3JpZ2luX2VjEH0aCXVzLWVhc3QtMSJHMEUCIDY4clmPDbLAbz4EM8cpDRsxvMn%2FaBXnnMbltZftAJZwAiEAilJmm45ugoCHRW8m6YY%2Fry%2BsRtAl2apPwFLI8P3cg0sqwwUIxv%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FARADGgw4NTkyMDU2Mzc0MTEiDI8B4EzWTo5P6GCVFSqXBcB77YdBJEx0jQa1mhCdJNIzVKlncJ%2BhpCs4Xp8%2BPkxZkmiUxq4xEb%2BZrnTCQ1wX7Q0MAM3GBLqPkRhsD0LZXV5mP4hiAGsxs15COXtkco9COPwoURMy7LweySSBs49gevI1CeToOhfhgba5EKmoCTFDkz%2BsE6YigWvFnGSz5wtgb4CNpCT%2FNIq8rN1ckpdh2lE9C2bJDRgQfILYgHoLpPyzQcLQwrw%2BYHjuctpDbd%2FP8R9pfWeV1vEpCH%2FBdWtdSGNc5dHfM%2BeBIKawrDK08%2BBlR1yFf7gN0fxZdtQAfX9psuyn0yspNxibnd9KNbPqmljNO2k35A2EDhcc8sye21Z8Se2d0FbkAIjy4Awy0fj8MwTsZVmkavtUxU%2Ftmg3xHhSgcbKuPkDscq50ADOgYI%2BM6Uu4ACsotPtSh%2Fb54zgEK7mQE4brlQn13d3Ti9%2FPGIfRhruJOQ8Y7gkiPFzNyxJxj4QdG%2Be%2BjLElprpikp8xN4E630vZL%2BSP4fIL3SJ2HNVvd3E%2BHiSSwDXkDX%2BvRLJlA%2FTfvxDMI4FFJdjdkf67T7yXpD7VmIUisa7KQbMQD7ul3rWxthH9u09jlCuaIvHb%2FyAoQ6OF16ArfT4BLCL54vJfuSb2NciVqg1AkXwmxMsLl6bE6fnnEkNRalquiZ8Wv2XgSkimSblGzHbba6RJf9KaUsEcxx4zp%2FpuVr9JaZdsR5kdYdHo97o0JCRc%2BqCYXOhPO0fa2oGY8pOgZwF4MbxP%2FirpKzxBmB4hNsnGRCKaQKtKu825RitYGrDYVFqZ5dlPWMgy3MaLvWeUvKnGjCDd8ba%2FzwycPPUsq5jtAcLl8PZZ0lds8M4bBiWnQruhSQMeBIXpR8SavPfhB%2BpKhlWQ0Mos3TD0obCxBjqxAfW53wsAzlieG0vZZliZCUE%2FgvOD9%2BiDN05rfEQ6rZzVYf60L8p%2B%2Bb8EN9S9y%2B2ASBvi9FYDKfMziNImOFH4RyBsUZrbUU%2BNxpFHknpokbZZEHAfa6kKCBhmomscV4kYV0hbNCOM3rGtzT0B2PIokCeE6hAEvFE%2BpqFWOa52CngJff2xGMQbWciTPLSSPbpHPWborWrmHcElDHgQlWANzaxOKUnKYF2Zs04Z505uiyNF%2Fg%3D%3D&AWSAccessKeyId=ASIA4QDFFSUR7DC3PP4B", "publishCompletionUrl": "/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@1ae3468dbf0b43b4a2f51b14d6ad45ef/handler/publish_completion", "transcriptLanguage": "en", "showCaptions": "true", "completionEnabled": false, "prioritizeHls": false, "sources": ["https://d2f1egay8yehza.cloudfront.net/MIT315XX/MIT315XXT115-V002600_DTH.webm", "https://d2f1egay8yehza.cloudfront.net/MIT315XX/MIT315XXT115-V002600_DTH.mp4", "https://d2f1egay8yehza.cloudfront.net/MIT315XXT115-V002600/MIT315XXT115-V002600.m3u8"], "transcriptAvailableTranslationsUrl": "/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@1ae3468dbf0b43b4a2f51b14d6ad45ef/handler/transcript/available_translations", "ytApiUrl": "https://www.youtube.com/iframe_api", "autohideHtml5": false, "start": 0.0, "generalSpeed": 1.0, "recordedYoutubeIsAvailable": true, "speed": null, "end": 0.0, "ytMetadataEndpoint": "", "savedVideoPosition": 0.0, "ytTestTimeout": 1500, "autoplay": false, "saveStateUrl": "/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@1ae3468dbf0b43b4a2f51b14d6ad45ef/handler/xmodule_handler/save_user_state", "saveStateEnabled": false, "transcriptTranslationUrl": "/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@1ae3468dbf0b43b4a2f51b14d6ad45ef/handler/transcript/translation/__lang__", "streams": "1.00:M5oG3OvPtRQ", "completionPercentage": 0.95, "duration": 642.93, "lmsRootURL": "https://openlearninglibrary.mit.edu"}'
data-bumper-metadata='null'
data-autoadvance-enabled="False"
data-poster='null'
tabindex="-1"
>
<div class="focus_grabber first"></div>
<div class="tc-wrapper">
<div class="video-wrapper">
<span tabindex="0" class="spinner" aria-hidden="false" aria-label="Loading video player"></span>
<span tabindex="-1" class="btn-play fa fa-youtube-play fa-2x is-hidden" aria-hidden="true" aria-label="Play video"></span>
<div class="video-player-pre"></div>
<div class="video-player">
<div id="1ae3468dbf0b43b4a2f51b14d6ad45ef"></div>
<h4 class="hd hd-4 video-error is-hidden">No playable video sources found.</h4>
<h4 class="hd hd-4 video-hls-error is-hidden">
Your browser does not support this video format. Try using a different browser.
</h4>
</div>
<div class="video-player-post"></div>
<div class="closed-captions"></div>
<div class="video-controls is-hidden">
<div>
<div class="vcr"><div class="vidtime">0:00 / 0:00</div></div>
<div class="secondary-controls"></div>
</div>
</div>
</div>
</div>
<div class="focus_grabber last"></div>
<h3 class="hd hd-4 downloads-heading sr" id="video-download-transcripts_1ae3468dbf0b43b4a2f51b14d6ad45ef">Downloads and transcripts</h3>
<div class="wrapper-downloads" role="region" aria-labelledby="video-download-transcripts_1ae3468dbf0b43b4a2f51b14d6ad45ef">
<div class="wrapper-download-transcripts">
<h4 class="hd hd-5">Transcripts</h4>
<ul class="list-download-transcripts">
<li class="transcript-option">
<a class="btn btn-link" href="/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@1ae3468dbf0b43b4a2f51b14d6ad45ef/handler/transcript/download" data-value="srt">Download SubRip (.srt) file</a>
</li>
<li class="transcript-option">
<a class="btn btn-link" href="/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@1ae3468dbf0b43b4a2f51b14d6ad45ef/handler/transcript/download" data-value="txt">Download Text (.txt) file</a>
</li>
</ul>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="xblock xblock-public_view xblock-public_view-vertical" data-block-type="vertical" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITX+3.15.1x+2T2017+type@vertical+block@4fb62602367247c7bed4802681e6f91e" data-course-id="course-v1:MITX+3.15.1x+2T2017" data-has-score="False" data-graded="False" data-runtime-version="1" data-init="VerticalStudentView" data-request-token="7ce9e05e041011efa56f0afff417eba9">
<h2 class="hd hd-2 unit-title">In-Lecture Question 4.2</h2>
<div class="vert-mod">
<div class="vert vert-0" data-id="block-v1:MITX+3.15.1x+2T2017+type@problem+block@7163aa8e101b4ab09b19f675ee6d7018">
<div class="xblock xblock-public_view xblock-public_view-problem xmodule_display xmodule_ProblemBlock" data-block-type="problem" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITX+3.15.1x+2T2017+type@problem+block@7163aa8e101b4ab09b19f675ee6d7018" data-course-id="course-v1:MITX+3.15.1x+2T2017" data-has-score="True" data-graded="False" data-runtime-version="1" data-init="XBlockToXModuleShim" data-request-token="7ce9e05e041011efa56f0afff417eba9">
<script type="json/xblock-args" class="xblock-json-init-args">
{"xmodule-type": "Problem"}
</script>
<div id="problem_7163aa8e101b4ab09b19f675ee6d7018" class="problems-wrapper" role="group"
aria-labelledby="7163aa8e101b4ab09b19f675ee6d7018-problem-title"
data-problem-id="block-v1:MITX+3.15.1x+2T2017+type@problem+block@7163aa8e101b4ab09b19f675ee6d7018" data-url="/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@problem+block@7163aa8e101b4ab09b19f675ee6d7018/handler/xmodule_handler"
data-problem-score="0"
data-problem-total-possible="0"
data-attempts-used="0"
data-content="
<h3 class="hd hd-3 problem-header" id="7163aa8e101b4ab09b19f675ee6d7018-problem-title" aria-describedby="block-v1:MITX+3.15.1x+2T2017+type@problem+block@7163aa8e101b4ab09b19f675ee6d7018-problem-progress" tabindex="-1">
In-Lecture Question 4.2
</h3>
<div class="problem-progress" id="block-v1:MITX+3.15.1x+2T2017+type@problem+block@7163aa8e101b4ab09b19f675ee6d7018-problem-progress"></div>
<div class="problem">
<div>
<span id="anchor_change_my_id_for_each_one_on_the_page"/>
<script type="text/javascript">
/* The object here is to replace the single line input with a textarea */
(function() {
var elem = $("#anchor_change_my_id_for_each_one_on_the_page")
.closest("div.problem")
.find(":text");
/* There's CSS in the LMS that controls the height, so we have to override here */
var textarea = $('<textarea style="height:150px" rows="20" cols="70"/>');
console.log(elem);
console.log(textarea);
//This is just a way to do an iterator in JS
for (attrib in {'id':null, 'name':null}) {
textarea.attr(attrib, elem.attr(attrib));
}
/* copy over the submitted value */
textarea.val(elem.val())
elem.replaceWith(textarea);
})();
</script>
<p>For a BJT in forward active mode, explain concisely what factor(s) determine the current &#946;, and why.</p>
<div class="wrapper-problem-response" tabindex="-1" aria-label="Question 1" role="group"><div id="inputtype_7163aa8e101b4ab09b19f675ee6d7018_2_1" class=" capa_inputtype textline">
<div class="unanswered ">
<input type="text" name="input_7163aa8e101b4ab09b19f675ee6d7018_2_1" id="input_7163aa8e101b4ab09b19f675ee6d7018_2_1" aria-describedby="status_7163aa8e101b4ab09b19f675ee6d7018_2_1" value=""/>
<span class="trailing_text" id="trailing_text_7163aa8e101b4ab09b19f675ee6d7018_2_1"/>
<span class="status unanswered" id="status_7163aa8e101b4ab09b19f675ee6d7018_2_1" data-tooltip="Not yet answered.">
<span class="sr">unanswered</span><span class="status-icon" aria-hidden="true"/>
</span>
<p id="answer_7163aa8e101b4ab09b19f675ee6d7018_2_1" class="answer"/>
</div>
</div></div>
<div class="solution-span">
<span id="solution_7163aa8e101b4ab09b19f675ee6d7018_solution_1"/>
</div></div>
<div class="action">
<input type="hidden" name="problem_id" value="In-Lecture Question 4.2" />
<div class="submit-attempt-container">
<button type="button" class="submit btn-brand" data-submitting="Submitting" data-value="Submit" data-should-enable-submit-button="True" aria-describedby="submission_feedback_7163aa8e101b4ab09b19f675ee6d7018" >
<span class="submit-label">Submit</span>
</button>
<div class="submission-feedback" id="submission_feedback_7163aa8e101b4ab09b19f675ee6d7018">
<span class="sr">Some problems have options such as save, reset, hints, or show answer. These options follow the Submit button.</span>
</div>
</div>
<div class="problem-action-buttons-wrapper">
</div>
</div>
<div class="notification warning notification-gentle-alert
is-hidden"
tabindex="-1">
<span class="icon fa fa-exclamation-circle" aria-hidden="true"></span>
<span class="notification-message" aria-describedby="7163aa8e101b4ab09b19f675ee6d7018-problem-title">
</span>
<div class="notification-btn-wrapper">
<button type="button" class="btn btn-default btn-small notification-btn review-btn sr">Review</button>
</div>
</div>
<div class="notification warning notification-save
is-hidden"
tabindex="-1">
<span class="icon fa fa-save" aria-hidden="true"></span>
<span class="notification-message" aria-describedby="7163aa8e101b4ab09b19f675ee6d7018-problem-title">None
</span>
<div class="notification-btn-wrapper">
<button type="button" class="btn btn-default btn-small notification-btn review-btn sr">Review</button>
</div>
</div>
<div class="notification general notification-show-answer
is-hidden"
tabindex="-1">
<span class="icon fa fa-info-circle" aria-hidden="true"></span>
<span class="notification-message" aria-describedby="7163aa8e101b4ab09b19f675ee6d7018-problem-title">Answers are displayed within the problem
</span>
<div class="notification-btn-wrapper">
<button type="button" class="btn btn-default btn-small notification-btn review-btn sr">Review</button>
</div>
</div>
</div>
"
data-graded="False">
<p class="loading-spinner">
<i class="fa fa-spinner fa-pulse fa-2x fa-fw"></i>
<span class="sr">Loading…</span>
</p>
</div>
</div>
</div>
</div>
</div>
<div class="xblock xblock-public_view xblock-public_view-vertical" data-block-type="vertical" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITX+3.15.1x+2T2017+type@vertical+block@42075c1a24e94e22bb21c5dc277ac60b" data-course-id="course-v1:MITX+3.15.1x+2T2017" data-has-score="False" data-graded="False" data-runtime-version="1" data-init="VerticalStudentView" data-request-token="7ce9e05e041011efa56f0afff417eba9">
<h2 class="hd hd-2 unit-title">The BJT: Other Operation Modes & Summary</h2>
<div class="vert-mod">
<div class="vert vert-0" data-id="block-v1:MITX+3.15.1x+2T2017+type@video+block@c478dc47ccbc4b29a2a8b530d5655240">
<div class="xblock xblock-public_view xblock-public_view-video xmodule_display xmodule_VideoBlock" data-block-type="video" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITX+3.15.1x+2T2017+type@video+block@c478dc47ccbc4b29a2a8b530d5655240" data-course-id="course-v1:MITX+3.15.1x+2T2017" data-has-score="False" data-graded="False" data-runtime-version="1" data-init="XBlockToXModuleShim" data-request-token="7ce9e05e041011efa56f0afff417eba9">
<script type="json/xblock-args" class="xblock-json-init-args">
{"xmodule-type": "Video"}
</script>
<h3 class="hd hd-2">The BJT: Other Operation Modes & Summary</h3>
<div
id="video_c478dc47ccbc4b29a2a8b530d5655240"
class="video closed"
data-metadata='{"transcriptLanguages": {"en": "English"}, "captionDataDir": null, "autoAdvance": false, "poster": "https://mitx-edx-video-meta-storage.s3.amazonaws.com/media/video-images/56a3e3393fee4d5ca5a9cdfeb97d31a9.jpeg?Expires=1714165735&Signature=mHv87qgC24lo%2BhYWJ%2FJrUidGukc%3D&x-amz-security-token=IQoJb3JpZ2luX2VjEH0aCXVzLWVhc3QtMSJHMEUCIDY4clmPDbLAbz4EM8cpDRsxvMn%2FaBXnnMbltZftAJZwAiEAilJmm45ugoCHRW8m6YY%2Fry%2BsRtAl2apPwFLI8P3cg0sqwwUIxv%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FARADGgw4NTkyMDU2Mzc0MTEiDI8B4EzWTo5P6GCVFSqXBcB77YdBJEx0jQa1mhCdJNIzVKlncJ%2BhpCs4Xp8%2BPkxZkmiUxq4xEb%2BZrnTCQ1wX7Q0MAM3GBLqPkRhsD0LZXV5mP4hiAGsxs15COXtkco9COPwoURMy7LweySSBs49gevI1CeToOhfhgba5EKmoCTFDkz%2BsE6YigWvFnGSz5wtgb4CNpCT%2FNIq8rN1ckpdh2lE9C2bJDRgQfILYgHoLpPyzQcLQwrw%2BYHjuctpDbd%2FP8R9pfWeV1vEpCH%2FBdWtdSGNc5dHfM%2BeBIKawrDK08%2BBlR1yFf7gN0fxZdtQAfX9psuyn0yspNxibnd9KNbPqmljNO2k35A2EDhcc8sye21Z8Se2d0FbkAIjy4Awy0fj8MwTsZVmkavtUxU%2Ftmg3xHhSgcbKuPkDscq50ADOgYI%2BM6Uu4ACsotPtSh%2Fb54zgEK7mQE4brlQn13d3Ti9%2FPGIfRhruJOQ8Y7gkiPFzNyxJxj4QdG%2Be%2BjLElprpikp8xN4E630vZL%2BSP4fIL3SJ2HNVvd3E%2BHiSSwDXkDX%2BvRLJlA%2FTfvxDMI4FFJdjdkf67T7yXpD7VmIUisa7KQbMQD7ul3rWxthH9u09jlCuaIvHb%2FyAoQ6OF16ArfT4BLCL54vJfuSb2NciVqg1AkXwmxMsLl6bE6fnnEkNRalquiZ8Wv2XgSkimSblGzHbba6RJf9KaUsEcxx4zp%2FpuVr9JaZdsR5kdYdHo97o0JCRc%2BqCYXOhPO0fa2oGY8pOgZwF4MbxP%2FirpKzxBmB4hNsnGRCKaQKtKu825RitYGrDYVFqZ5dlPWMgy3MaLvWeUvKnGjCDd8ba%2FzwycPPUsq5jtAcLl8PZZ0lds8M4bBiWnQruhSQMeBIXpR8SavPfhB%2BpKhlWQ0Mos3TD0obCxBjqxAfW53wsAzlieG0vZZliZCUE%2FgvOD9%2BiDN05rfEQ6rZzVYf60L8p%2B%2Bb8EN9S9y%2B2ASBvi9FYDKfMziNImOFH4RyBsUZrbUU%2BNxpFHknpokbZZEHAfa6kKCBhmomscV4kYV0hbNCOM3rGtzT0B2PIokCeE6hAEvFE%2BpqFWOa52CngJff2xGMQbWciTPLSSPbpHPWborWrmHcElDHgQlWANzaxOKUnKYF2Zs04Z505uiyNF%2Fg%3D%3D&AWSAccessKeyId=ASIA4QDFFSUR7DC3PP4B", "publishCompletionUrl": "/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@c478dc47ccbc4b29a2a8b530d5655240/handler/publish_completion", "transcriptLanguage": "en", "showCaptions": "true", "completionEnabled": false, "prioritizeHls": false, "sources": ["https://d2f1egay8yehza.cloudfront.net/MIT315XX/MIT315XXT115-V002700_DTH.webm", "https://d2f1egay8yehza.cloudfront.net/MIT315XX/MIT315XXT115-V002700_DTH.mp4", "https://d2f1egay8yehza.cloudfront.net/MIT315XXT115-V002700/MIT315XXT115-V002700.m3u8"], "transcriptAvailableTranslationsUrl": "/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@c478dc47ccbc4b29a2a8b530d5655240/handler/transcript/available_translations", "ytApiUrl": "https://www.youtube.com/iframe_api", "autohideHtml5": false, "start": 0.0, "generalSpeed": 1.0, "recordedYoutubeIsAvailable": true, "speed": null, "end": 0.0, "ytMetadataEndpoint": "", "savedVideoPosition": 0.0, "ytTestTimeout": 1500, "autoplay": false, "saveStateUrl": "/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@c478dc47ccbc4b29a2a8b530d5655240/handler/xmodule_handler/save_user_state", "saveStateEnabled": false, "transcriptTranslationUrl": "/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@c478dc47ccbc4b29a2a8b530d5655240/handler/transcript/translation/__lang__", "streams": "1.00:NoKW27hmzDo", "completionPercentage": 0.95, "duration": 338.2, "lmsRootURL": "https://openlearninglibrary.mit.edu"}'
data-bumper-metadata='null'
data-autoadvance-enabled="False"
data-poster='null'
tabindex="-1"
>
<div class="focus_grabber first"></div>
<div class="tc-wrapper">
<div class="video-wrapper">
<span tabindex="0" class="spinner" aria-hidden="false" aria-label="Loading video player"></span>
<span tabindex="-1" class="btn-play fa fa-youtube-play fa-2x is-hidden" aria-hidden="true" aria-label="Play video"></span>
<div class="video-player-pre"></div>
<div class="video-player">
<div id="c478dc47ccbc4b29a2a8b530d5655240"></div>
<h4 class="hd hd-4 video-error is-hidden">No playable video sources found.</h4>
<h4 class="hd hd-4 video-hls-error is-hidden">
Your browser does not support this video format. Try using a different browser.
</h4>
</div>
<div class="video-player-post"></div>
<div class="closed-captions"></div>
<div class="video-controls is-hidden">
<div>
<div class="vcr"><div class="vidtime">0:00 / 0:00</div></div>
<div class="secondary-controls"></div>
</div>
</div>
</div>
</div>
<div class="focus_grabber last"></div>
<h3 class="hd hd-4 downloads-heading sr" id="video-download-transcripts_c478dc47ccbc4b29a2a8b530d5655240">Downloads and transcripts</h3>
<div class="wrapper-downloads" role="region" aria-labelledby="video-download-transcripts_c478dc47ccbc4b29a2a8b530d5655240">
<div class="wrapper-download-transcripts">
<h4 class="hd hd-5">Transcripts</h4>
<ul class="list-download-transcripts">
<li class="transcript-option">
<a class="btn btn-link" href="/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@c478dc47ccbc4b29a2a8b530d5655240/handler/transcript/download" data-value="srt">Download SubRip (.srt) file</a>
</li>
<li class="transcript-option">
<a class="btn btn-link" href="/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@video+block@c478dc47ccbc4b29a2a8b530d5655240/handler/transcript/download" data-value="txt">Download Text (.txt) file</a>
</li>
</ul>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="xblock xblock-public_view xblock-public_view-vertical" data-block-type="vertical" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITX+3.15.1x+2T2017+type@vertical+block@a7bc0ef70ad7468a95f8830139ef98bc" data-course-id="course-v1:MITX+3.15.1x+2T2017" data-has-score="False" data-graded="False" data-runtime-version="1" data-init="VerticalStudentView" data-request-token="7ce9e05e041011efa56f0afff417eba9">
<h2 class="hd hd-2 unit-title">In-Lecture Question 4.3</h2>
<div class="vert-mod">
<div class="vert vert-0" data-id="block-v1:MITX+3.15.1x+2T2017+type@problem+block@53a3a43add1044bc8d11f0af9d7bcf9e">
<div class="xblock xblock-public_view xblock-public_view-problem xmodule_display xmodule_ProblemBlock" data-block-type="problem" data-runtime-class="LmsRuntime" data-usage-id="block-v1:MITX+3.15.1x+2T2017+type@problem+block@53a3a43add1044bc8d11f0af9d7bcf9e" data-course-id="course-v1:MITX+3.15.1x+2T2017" data-has-score="True" data-graded="False" data-runtime-version="1" data-init="XBlockToXModuleShim" data-request-token="7ce9e05e041011efa56f0afff417eba9">
<script type="json/xblock-args" class="xblock-json-init-args">
{"xmodule-type": "Problem"}
</script>
<div id="problem_53a3a43add1044bc8d11f0af9d7bcf9e" class="problems-wrapper" role="group"
aria-labelledby="53a3a43add1044bc8d11f0af9d7bcf9e-problem-title"
data-problem-id="block-v1:MITX+3.15.1x+2T2017+type@problem+block@53a3a43add1044bc8d11f0af9d7bcf9e" data-url="/courses/course-v1:MITX+3.15.1x+2T2017/xblock/block-v1:MITX+3.15.1x+2T2017+type@problem+block@53a3a43add1044bc8d11f0af9d7bcf9e/handler/xmodule_handler"
data-problem-score="0"
data-problem-total-possible="1"
data-attempts-used="0"
data-content="
<h3 class="hd hd-3 problem-header" id="53a3a43add1044bc8d11f0af9d7bcf9e-problem-title" aria-describedby="block-v1:MITX+3.15.1x+2T2017+type@problem+block@53a3a43add1044bc8d11f0af9d7bcf9e-problem-progress" tabindex="-1">
In-Lecture Question 4.3
</h3>
<div class="problem-progress" id="block-v1:MITX+3.15.1x+2T2017+type@problem+block@53a3a43add1044bc8d11f0af9d7bcf9e-problem-progress"></div>
<div class="problem">
<div>
<div>
<p> </p>
<p> </p>
<span id="anchor_change_my_id_for_each_one_on_the_page"/>
<p> </p>
<script type="text/javascript">
/* The object here is to replace the single line input with a textarea */
(function() {
var elem = $("#anchor_change_my_id_for_each_one_on_the_page")
.closest("div.problem")
.find(":text");
/* There's CSS in the LMS that controls the height, so we have to override here */
var textarea = $('<textarea style="height:150px" rows="20" cols="70"/>');
console.log(elem);
console.log(textarea);
//This is just a way to do an iterator in JS
for (attrib in {'id':null, 'name':null}) {
textarea.attr(attrib, elem.attr(attrib));
}
/* copy over the submitted value */
textarea.val(elem.val())
elem.replaceWith(textarea);
})();
</script>
<p>How do you bias a BJT to put it into saturation mode and into cutoff mode? Why are these modes useful?</p>
<div class="wrapper-problem-response" tabindex="-1" aria-label="Question 1" role="group"><div id="inputtype_53a3a43add1044bc8d11f0af9d7bcf9e_2_1" class=" capa_inputtype textline">
<div class="unanswered ">
<input type="text" name="input_53a3a43add1044bc8d11f0af9d7bcf9e_2_1" id="input_53a3a43add1044bc8d11f0af9d7bcf9e_2_1" aria-describedby="status_53a3a43add1044bc8d11f0af9d7bcf9e_2_1" value=""/>
<span class="trailing_text" id="trailing_text_53a3a43add1044bc8d11f0af9d7bcf9e_2_1"/>
<span class="status unanswered" id="status_53a3a43add1044bc8d11f0af9d7bcf9e_2_1" data-tooltip="Not yet answered.">
<span class="sr">unanswered</span><span class="status-icon" aria-hidden="true"/>
</span>
<p id="answer_53a3a43add1044bc8d11f0af9d7bcf9e_2_1" class="answer"/>
</div>
</div></div>
<div class="solution-span">
<span id="solution_53a3a43add1044bc8d11f0af9d7bcf9e_solution_1"/>
</div></div>
</div>
<div class="action">
<input type="hidden" name="problem_id" value="In-Lecture Question 4.3" />
<div class="submit-attempt-container">
<button type="button" class="submit btn-brand" data-submitting="Submitting" data-value="Submit" data-should-enable-submit-button="True" aria-describedby="submission_feedback_53a3a43add1044bc8d11f0af9d7bcf9e" >
<span class="submit-label">Submit</span>
</button>
<div class="submission-feedback" id="submission_feedback_53a3a43add1044bc8d11f0af9d7bcf9e">
<span class="sr">Some problems have options such as save, reset, hints, or show answer. These options follow the Submit button.</span>
</div>
</div>
<div class="problem-action-buttons-wrapper">
</div>
</div>
<div class="notification warning notification-gentle-alert
is-hidden"
tabindex="-1">
<span class="icon fa fa-exclamation-circle" aria-hidden="true"></span>
<span class="notification-message" aria-describedby="53a3a43add1044bc8d11f0af9d7bcf9e-problem-title">
</span>
<div class="notification-btn-wrapper">
<button type="button" class="btn btn-default btn-small notification-btn review-btn sr">Review</button>
</div>
</div>
<div class="notification warning notification-save
is-hidden"
tabindex="-1">
<span class="icon fa fa-save" aria-hidden="true"></span>
<span class="notification-message" aria-describedby="53a3a43add1044bc8d11f0af9d7bcf9e-problem-title">None
</span>
<div class="notification-btn-wrapper">
<button type="button" class="btn btn-default btn-small notification-btn review-btn sr">Review</button>
</div>
</div>
<div class="notification general notification-show-answer
is-hidden"
tabindex="-1">
<span class="icon fa fa-info-circle" aria-hidden="true"></span>
<span class="notification-message" aria-describedby="53a3a43add1044bc8d11f0af9d7bcf9e-problem-title">Answers are displayed within the problem
</span>
<div class="notification-btn-wrapper">
<button type="button" class="btn btn-default btn-small notification-btn review-btn sr">Review</button>
</div>
</div>
</div>
"
data-graded="False">
<p class="loading-spinner">
<i class="fa fa-spinner fa-pulse fa-2x fa-fw"></i>
<span class="sr">Loading…</span>
</p>
</div>
</div>
</div>
</div>
</div>
© All Rights Reserved