<div class="xblock xblock-public_view xblock-public_view-vertical" data-init="VerticalStudentView" data-runtime-version="1" data-graded="True" data-has-score="False" data-usage-id="block-v1:MITx+22.011x+3T2018+type@vertical+block@14e3d8f4f92c41b5ac135d2076dea68f" data-runtime-class="LmsRuntime" data-request-token="d1c9355851dd11ecbe401652d7ed4529" data-block-type="vertical" data-course-id="course-v1:MITx+22.011x+3T2018">
<h2 class="hd hd-2 unit-title">3.2.5. Video Lecture</h2>
<div class="vert-mod">
<div class="vert vert-0" data-id="block-v1:MITx+22.011x+3T2018+type@video+block@f06fa7cd80274dc08160412b559e55a3">
<div class="xblock xblock-public_view xblock-public_view-video xmodule_display xmodule_VideoBlock" data-init="XBlockToXModuleShim" data-runtime-version="1" data-graded="True" data-has-score="False" data-usage-id="block-v1:MITx+22.011x+3T2018+type@video+block@f06fa7cd80274dc08160412b559e55a3" data-runtime-class="LmsRuntime" data-request-token="d1c9355851dd11ecbe401652d7ed4529" data-block-type="video" data-course-id="course-v1:MITx+22.011x+3T2018">
<script type="json/xblock-args" class="xblock-json-init-args">
{"xmodule-type": "Video"}
</script>
<h3 class="hd hd-2">Video</h3>
<div
id="video_f06fa7cd80274dc08160412b559e55a3"
class="video closed"
data-metadata='{"generalSpeed": 1.0, "poster": "https://mitx-edx-video-meta-storage.s3.amazonaws.com/media/video-images/afce792c6c754d2d84198fcc786713fe.png?Expires=1638277669&Signature=TrIRGcdwAp3JVIpG0FrDwhbmF3s%3D&x-amz-security-token=IQoJb3JpZ2luX2VjECUaCXVzLWVhc3QtMSJHMEUCIA8DUWNvqhDY7PsxeXDxM6VeVwNqwn2w7DC8x8lvCJgSAiEAtqsAOiCjt6GwdH8XngZ%2Bhqm4TJlE3F2tA21jjf2FJo0qgwQI7v%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FARACGgw4NTkyMDU2Mzc0MTEiDKSubzic8YMsKqZp4yrXA9Bm5zvX7BeAiPq4BisKsCkwMpbO6iNZQ5PbG65kN9hCjW%2B3Xfdx3Wzu580at6xulWpZhC86MeD4LPk3Vgigh%2F7BTk3%2FsFyl6s2rHVbb9vzElmQq5%2BFcmzTNjgpx2mAxctni%2FJaDdwhbME3E%2B9d6D32p4hfRuMCPRlsPS9pzd4qYKtLGqsg2FpfbfUEJe5aySSs73Uo62zzKe9pzPphN1rBQnvBNTMUItoYn5RJmQv2xTpO2SnkN91SlR0yhNKZ%2BpUbhi9czZFnFfWM99Et1yMvl53LEv3WUt2SoG7xOplgNou%2BmyCsUbCJKkjVNC%2BoarCXXrhFISx5MP6os8wX0iNiewnE5r0H6lZs4%2FEhU1ucrE4%2FCMVg%2B2B4rbx%2F9qD%2Bi8mPY58PqQU%2Bfqx7Sv4prMp8BCqVK%2BG51%2FqS95I2sC8zVR7mtoBuCDyxwoAvk0kjBZxJN2B%2FNdf%2BwvKIUIc7GJQ5q2yHeiI6ApNsZzDWFuXMk7Y6MgCq%2Ff4ELWcypClmy2fTxlfO%2BAV8VWW4RbYO%2BuPCYMw9GklMg3hG%2FUDCWokg8LC%2F6FWg5IiVoxWnwMvEGRH4LISVH2rpN4FZS2JFhp1xYiBzzZjqzsuCvO4hGtNq9ZI6TpRDGrzD1wZiNBjqlAUYMKQsyvYxWg0rJ7yXafShqKvewKdGKJfXq%2BxdpW%2FzqG6pYeOMTpxigS29KhUrAZeyaIC2Hk1cSJrbnSu55JDOKBYZjw0on2Tp2QoEP4Vifabf1ziYk6VrTVT2md4v2%2FkjFlWP6d5mBBJPruyjx6fn8TeJzQsTgTXP1%2FWZah7bEhP4%2Bs6%2Bf7PBDnyC6NO1vdyuv4HxjpcUu7DK95GtLjIDU5%2Bchww%3D%3D&AWSAccessKeyId=ASIA4QDFFSURW4LMM7LV", "lmsRootURL": "https://openlearninglibrary.mit.edu", "publishCompletionUrl": "/courses/course-v1:MITx+22.011x+3T2018/xblock/block-v1:MITx+22.011x+3T2018+type@video+block@f06fa7cd80274dc08160412b559e55a3/handler/publish_completion", "sources": ["https://d2f1egay8yehza.cloudfront.net/MITx22.011x-V010600/MITx22.011x-V010600.m3u8", "https://d2f1egay8yehza.cloudfront.net/MITx22.011x-V010600_DTH.mp4"], "completionPercentage": 0.95, "transcriptTranslationUrl": "/courses/course-v1:MITx+22.011x+3T2018/xblock/block-v1:MITx+22.011x+3T2018+type@video+block@f06fa7cd80274dc08160412b559e55a3/handler/transcript/translation/__lang__", "streams": "1.00:AR92ryfULlA", "transcriptAvailableTranslationsUrl": "/courses/course-v1:MITx+22.011x+3T2018/xblock/block-v1:MITx+22.011x+3T2018+type@video+block@f06fa7cd80274dc08160412b559e55a3/handler/transcript/available_translations", "ytTestTimeout": 1500, "autohideHtml5": false, "saveStateUrl": "/courses/course-v1:MITx+22.011x+3T2018/xblock/block-v1:MITx+22.011x+3T2018+type@video+block@f06fa7cd80274dc08160412b559e55a3/handler/xmodule_handler/save_user_state", "speed": null, "autoAdvance": false, "saveStateEnabled": false, "start": 0.0, "ytApiUrl": "https://www.youtube.com/iframe_api", "duration": 617.03, "recordedYoutubeIsAvailable": true, "showCaptions": "true", "end": 0.0, "ytMetadataEndpoint": "", "prioritizeHls": false, "autoplay": false, "captionDataDir": null, "transcriptLanguage": "en", "transcriptLanguages": {"en": "English"}, "completionEnabled": false, "savedVideoPosition": 0.0}'
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="f06fa7cd80274dc08160412b559e55a3"></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_f06fa7cd80274dc08160412b559e55a3">Downloads and transcripts</h3>
<div class="wrapper-downloads" role="region" aria-labelledby="video-download-transcripts_f06fa7cd80274dc08160412b559e55a3">
<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+22.011x+3T2018/xblock/block-v1:MITx+22.011x+3T2018+type@video+block@f06fa7cd80274dc08160412b559e55a3/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+22.011x+3T2018/xblock/block-v1:MITx+22.011x+3T2018+type@video+block@f06fa7cd80274dc08160412b559e55a3/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-init="VerticalStudentView" data-runtime-version="1" data-graded="True" data-has-score="False" data-usage-id="block-v1:MITx+22.011x+3T2018+type@vertical+block@8ad263a1af154a8a82d924d71db76f62" data-runtime-class="LmsRuntime" data-request-token="d1c9355851dd11ecbe401652d7ed4529" data-block-type="vertical" data-course-id="course-v1:MITx+22.011x+3T2018">
<h2 class="hd hd-2 unit-title">3.2.5. Notes & Additional Material</h2>
<div class="vert-mod">
<div class="vert vert-0" data-id="block-v1:MITx+22.011x+3T2018+type@html+block@66c620a3259546daa03fa0ef66d52da0">
<div class="xblock xblock-public_view xblock-public_view-html xmodule_display xmodule_HtmlBlock" data-init="XBlockToXModuleShim" data-runtime-version="1" data-graded="True" data-has-score="False" data-usage-id="block-v1:MITx+22.011x+3T2018+type@html+block@66c620a3259546daa03fa0ef66d52da0" data-runtime-class="LmsRuntime" data-request-token="d1c9355851dd11ecbe401652d7ed4529" data-block-type="html" data-course-id="course-v1:MITx+22.011x+3T2018">
<script type="json/xblock-args" class="xblock-json-init-args">
{"xmodule-type": "HTMLModule"}
</script>
<p><strong>Use the following links to download this lecture's notes:</strong></p>
<p><a href="/assets/courseware/v1/120162a0e23980ced79cdad1215348a6/asset-v1:MITx+22.011x+3T2018+type@asset+block/Unit_3.2.5_required_pdf_lecture_notes_vf.pdf" target="[object Object]">Lecture 3.2.5. [Introduction to the Tokamak] - Required Lecture Notes</a></p>
<p><a href="/assets/courseware/v1/847d687b31e73cea3cfc95d627cd9754/asset-v1:MITx+22.011x+3T2018+type@asset+block/Unit_3.2.5_optional_pdf_lecture_notes_vf.pdf" target="[object Object]">Lecture 3.2.5. [Introduction to the Tokamak] - Optional Lecture Notes</a></p>
<p><strong>Optional reading section</strong></p>
<p><a href="/assets/courseware/v1/41ca527e4787b8f8aea374bf7ab6604a/asset-v1:MITx+22.011x+3T2018+type@asset+block/Optional_Reading_section_3.2.5_Tokamaks_JohnWesson_Chapter1.6_tokamaks.pdf" target="[object Object]">Lecture 3.2.5. [Tokamaks - JohnWesson,_Chapter 1.6_ -Tokamaks</a><a href="/assets/courseware/v1/847d687b31e73cea3cfc95d627cd9754/asset-v1:MITx+22.011x+3T2018+type@asset+block/Unit_3.2.5_optional_pdf_lecture_notes_vf.pdf" target="[object Object]">]</a><a href="/assets/courseware/v1/41ca527e4787b8f8aea374bf7ab6604a/asset-v1:MITx+22.011x+3T2018+type@asset+block/Optional_Reading_section_3.2.5_Tokamaks_JohnWesson_Chapter1.6_tokamaks.pdf" target="[object Object]"> - Optional Reading</a></p>
<p><strong></strong></p>
<p></p>
<p></p>
</div>
</div>
</div>
</div>
<div class="xblock xblock-public_view xblock-public_view-vertical" data-init="VerticalStudentView" data-runtime-version="1" data-graded="True" data-has-score="False" data-usage-id="block-v1:MITx+22.011x+3T2018+type@vertical+block@c5358dc50706499293fc2ff49f6f3654" data-runtime-class="LmsRuntime" data-request-token="d1c9355851dd11ecbe401652d7ed4529" data-block-type="vertical" data-course-id="course-v1:MITx+22.011x+3T2018">
<h2 class="hd hd-2 unit-title">3.2.5. Required Assessment</h2>
<div class="vert-mod">
<div class="vert vert-0" data-id="block-v1:MITx+22.011x+3T2018+type@problem+block@a6975230a0114bffa7128dff924250cd">
<div class="xblock xblock-public_view xblock-public_view-problem xmodule_display xmodule_ProblemBlock" data-init="XBlockToXModuleShim" data-runtime-version="1" data-graded="True" data-has-score="True" data-usage-id="block-v1:MITx+22.011x+3T2018+type@problem+block@a6975230a0114bffa7128dff924250cd" data-runtime-class="LmsRuntime" data-request-token="d1c9355851dd11ecbe401652d7ed4529" data-block-type="problem" data-course-id="course-v1:MITx+22.011x+3T2018">
<script type="json/xblock-args" class="xblock-json-init-args">
{"xmodule-type": "Problem"}
</script>
<div id="problem_a6975230a0114bffa7128dff924250cd" class="problems-wrapper" role="group"
aria-labelledby="a6975230a0114bffa7128dff924250cd-problem-title"
data-problem-id="block-v1:MITx+22.011x+3T2018+type@problem+block@a6975230a0114bffa7128dff924250cd" data-url="/courses/course-v1:MITx+22.011x+3T2018/xblock/block-v1:MITx+22.011x+3T2018+type@problem+block@a6975230a0114bffa7128dff924250cd/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="a6975230a0114bffa7128dff924250cd-problem-title" aria-describedby="block-v1:MITx+22.011x+3T2018+type@problem+block@a6975230a0114bffa7128dff924250cd-problem-progress" tabindex="-1">
Assessment 1
</h3>
<div class="problem-progress" id="block-v1:MITx+22.011x+3T2018+type@problem+block@a6975230a0114bffa7128dff924250cd-problem-progress"></div>
<div class="problem">
<div>
<div class="wrapper-problem-response" tabindex="-1" aria-label="Question 1" role="group"><div class="choicegroup capa_inputtype" id="inputtype_a6975230a0114bffa7128dff924250cd_2_1">
<fieldset aria-describedby="status_a6975230a0114bffa7128dff924250cd_2_1">
<legend id="a6975230a0114bffa7128dff924250cd_2_1-legend" class="response-fieldset-legend field-group-hd">Why will a hot plasma expand?</legend>
<div class="field">
<input type="radio" name="input_a6975230a0114bffa7128dff924250cd_2_1" id="input_a6975230a0114bffa7128dff924250cd_2_1_choice_0" class="field-input input-radio" value="choice_0"/><label id="a6975230a0114bffa7128dff924250cd_2_1-choice_0-label" for="input_a6975230a0114bffa7128dff924250cd_2_1_choice_0" class="response-label field-label label-inline" aria-describedby="status_a6975230a0114bffa7128dff924250cd_2_1"> the self-generated electric and magnetic fields in the plasma cause an outward force
</label>
</div>
<div class="field">
<input type="radio" name="input_a6975230a0114bffa7128dff924250cd_2_1" id="input_a6975230a0114bffa7128dff924250cd_2_1_choice_1" class="field-input input-radio" value="choice_1"/><label id="a6975230a0114bffa7128dff924250cd_2_1-choice_1-label" for="input_a6975230a0114bffa7128dff924250cd_2_1_choice_1" class="response-label field-label label-inline" aria-describedby="status_a6975230a0114bffa7128dff924250cd_2_1"> the gradient of the plasma pressure is equivalent to an outward force
</label>
</div>
<div class="field">
<input type="radio" name="input_a6975230a0114bffa7128dff924250cd_2_1" id="input_a6975230a0114bffa7128dff924250cd_2_1_choice_2" class="field-input input-radio" value="choice_2"/><label id="a6975230a0114bffa7128dff924250cd_2_1-choice_2-label" for="input_a6975230a0114bffa7128dff924250cd_2_1_choice_2" class="response-label field-label label-inline" aria-describedby="status_a6975230a0114bffa7128dff924250cd_2_1"> the plasma-wall interaction pulls the plasma outward, equivalent to an outward forcee
</label>
</div>
<span id="answer_a6975230a0114bffa7128dff924250cd_2_1"/>
</fieldset>
<div class="indicator-container">
<span class="status unanswered" id="status_a6975230a0114bffa7128dff924250cd_2_1" data-tooltip="Not yet answered.">
<span class="sr">unanswered</span><span class="status-icon" aria-hidden="true"/>
</span>
</div>
</div></div>
</div>
<div class="action">
<input type="hidden" name="problem_id" value="Assessment 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_a6975230a0114bffa7128dff924250cd" >
<span class="submit-label">Submit</span>
</button>
<div class="submission-feedback" id="submission_feedback_a6975230a0114bffa7128dff924250cd">
<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="a6975230a0114bffa7128dff924250cd-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="a6975230a0114bffa7128dff924250cd-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="a6975230a0114bffa7128dff924250cd-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="True">
<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 class="vert vert-1" data-id="block-v1:MITx+22.011x+3T2018+type@problem+block@aa86c5806fd2480a8355bf045cc15a1b">
<div class="xblock xblock-public_view xblock-public_view-problem xmodule_display xmodule_ProblemBlock" data-init="XBlockToXModuleShim" data-runtime-version="1" data-graded="True" data-has-score="True" data-usage-id="block-v1:MITx+22.011x+3T2018+type@problem+block@aa86c5806fd2480a8355bf045cc15a1b" data-runtime-class="LmsRuntime" data-request-token="d1c9355851dd11ecbe401652d7ed4529" data-block-type="problem" data-course-id="course-v1:MITx+22.011x+3T2018">
<script type="json/xblock-args" class="xblock-json-init-args">
{"xmodule-type": "Problem"}
</script>
<div id="problem_aa86c5806fd2480a8355bf045cc15a1b" class="problems-wrapper" role="group"
aria-labelledby="aa86c5806fd2480a8355bf045cc15a1b-problem-title"
data-problem-id="block-v1:MITx+22.011x+3T2018+type@problem+block@aa86c5806fd2480a8355bf045cc15a1b" data-url="/courses/course-v1:MITx+22.011x+3T2018/xblock/block-v1:MITx+22.011x+3T2018+type@problem+block@aa86c5806fd2480a8355bf045cc15a1b/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="aa86c5806fd2480a8355bf045cc15a1b-problem-title" aria-describedby="block-v1:MITx+22.011x+3T2018+type@problem+block@aa86c5806fd2480a8355bf045cc15a1b-problem-progress" tabindex="-1">
Assessment 2
</h3>
<div class="problem-progress" id="block-v1:MITx+22.011x+3T2018+type@problem+block@aa86c5806fd2480a8355bf045cc15a1b-problem-progress"></div>
<div class="problem">
<div>
<div class="wrapper-problem-response" tabindex="-1" aria-label="Question 1" role="group"><div class="choicegroup capa_inputtype" id="inputtype_aa86c5806fd2480a8355bf045cc15a1b_2_1">
<fieldset aria-describedby="status_aa86c5806fd2480a8355bf045cc15a1b_2_1 description_aa86c5806fd2480a8355bf045cc15a1b_1_1">
<legend id="aa86c5806fd2480a8355bf045cc15a1b_2_1-legend" class="response-fieldset-legend field-group-hd">A magnetic field can be used to counteract the outward expansion of a hot plasma according to MHD theory. Choose the correct equation that describes this force balance.</legend>
<p class="question-description" id="description_aa86c5806fd2480a8355bf045cc15a1b_1_1"> Select one anwer. </p>
<div class="field">
<input type="radio" name="input_aa86c5806fd2480a8355bf045cc15a1b_2_1" id="input_aa86c5806fd2480a8355bf045cc15a1b_2_1_choice_0" class="field-input input-radio" value="choice_0"/><label id="aa86c5806fd2480a8355bf045cc15a1b_2_1-choice_0-label" for="input_aa86c5806fd2480a8355bf045cc15a1b_2_1_choice_0" class="response-label field-label label-inline" aria-describedby="status_aa86c5806fd2480a8355bf045cc15a1b_2_1 description_aa86c5806fd2480a8355bf045cc15a1b_1_1"> \(F = qE = ma\), where \(F\) is the outward force caused by the charge \(q\) of the plasma and the electric field of the plasma, and m is the mass of the plasma.
</label>
</div>
<div class="field">
<input type="radio" name="input_aa86c5806fd2480a8355bf045cc15a1b_2_1" id="input_aa86c5806fd2480a8355bf045cc15a1b_2_1_choice_1" class="field-input input-radio" value="choice_1"/><label id="aa86c5806fd2480a8355bf045cc15a1b_2_1-choice_1-label" for="input_aa86c5806fd2480a8355bf045cc15a1b_2_1_choice_1" class="response-label field-label label-inline" aria-describedby="status_aa86c5806fd2480a8355bf045cc15a1b_2_1 description_aa86c5806fd2480a8355bf045cc15a1b_1_1"> \(&#8711;P = E_1 &#215; &#914;_2\) , where \(E_1\) and \(&#914;_2\) are the electric and magnetic fields, respectively
</label>
</div>
<div class="field">
<input type="radio" name="input_aa86c5806fd2480a8355bf045cc15a1b_2_1" id="input_aa86c5806fd2480a8355bf045cc15a1b_2_1_choice_2" class="field-input input-radio" value="choice_2"/><label id="aa86c5806fd2480a8355bf045cc15a1b_2_1-choice_2-label" for="input_aa86c5806fd2480a8355bf045cc15a1b_2_1_choice_2" class="response-label field-label label-inline" aria-describedby="status_aa86c5806fd2480a8355bf045cc15a1b_2_1 description_aa86c5806fd2480a8355bf045cc15a1b_1_1"> \(&#8711;P = J &#215; &#914;\), where \(J\) and \(&#914;\) are a current and magnetic field, respectvely
</label>
</div>
<span id="answer_aa86c5806fd2480a8355bf045cc15a1b_2_1"/>
</fieldset>
<div class="indicator-container">
<span class="status unanswered" id="status_aa86c5806fd2480a8355bf045cc15a1b_2_1" data-tooltip="Not yet answered.">
<span class="sr">unanswered</span><span class="status-icon" aria-hidden="true"/>
</span>
</div>
</div></div>
</div>
<div class="action">
<input type="hidden" name="problem_id" value="Assessment 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_aa86c5806fd2480a8355bf045cc15a1b" >
<span class="submit-label">Submit</span>
</button>
<div class="submission-feedback" id="submission_feedback_aa86c5806fd2480a8355bf045cc15a1b">
<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="aa86c5806fd2480a8355bf045cc15a1b-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="aa86c5806fd2480a8355bf045cc15a1b-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="aa86c5806fd2480a8355bf045cc15a1b-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="True">
<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 class="vert vert-2" data-id="block-v1:MITx+22.011x+3T2018+type@problem+block@13b7c25f3b614f87802782045706b659">
<div class="xblock xblock-public_view xblock-public_view-problem xmodule_display xmodule_ProblemBlock" data-init="XBlockToXModuleShim" data-runtime-version="1" data-graded="True" data-has-score="True" data-usage-id="block-v1:MITx+22.011x+3T2018+type@problem+block@13b7c25f3b614f87802782045706b659" data-runtime-class="LmsRuntime" data-request-token="d1c9355851dd11ecbe401652d7ed4529" data-block-type="problem" data-course-id="course-v1:MITx+22.011x+3T2018">
<script type="json/xblock-args" class="xblock-json-init-args">
{"xmodule-type": "Problem"}
</script>
<div id="problem_13b7c25f3b614f87802782045706b659" class="problems-wrapper" role="group"
aria-labelledby="13b7c25f3b614f87802782045706b659-problem-title"
data-problem-id="block-v1:MITx+22.011x+3T2018+type@problem+block@13b7c25f3b614f87802782045706b659" data-url="/courses/course-v1:MITx+22.011x+3T2018/xblock/block-v1:MITx+22.011x+3T2018+type@problem+block@13b7c25f3b614f87802782045706b659/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="13b7c25f3b614f87802782045706b659-problem-title" aria-describedby="block-v1:MITx+22.011x+3T2018+type@problem+block@13b7c25f3b614f87802782045706b659-problem-progress" tabindex="-1">
Assessment 3
</h3>
<div class="problem-progress" id="block-v1:MITx+22.011x+3T2018+type@problem+block@13b7c25f3b614f87802782045706b659-problem-progress"></div>
<div class="problem">
<div>
<div class="wrapper-problem-response" tabindex="-1" aria-label="Question 1" role="group"><div class="choicegroup capa_inputtype" id="inputtype_13b7c25f3b614f87802782045706b659_2_1">
<fieldset aria-describedby="status_13b7c25f3b614f87802782045706b659_2_1">
<legend id="13b7c25f3b614f87802782045706b659_2_1-legend" class="response-fieldset-legend field-group-hd">In a tokamak, how is the plasma current generated?</legend>
<div class="field">
<input type="radio" name="input_13b7c25f3b614f87802782045706b659_2_1" id="input_13b7c25f3b614f87802782045706b659_2_1_choice_0" class="field-input input-radio" value="choice_0"/><label id="13b7c25f3b614f87802782045706b659_2_1-choice_0-label" for="input_13b7c25f3b614f87802782045706b659_2_1_choice_0" class="response-label field-label label-inline" aria-describedby="status_13b7c25f3b614f87802782045706b659_2_1"> it is imposed with external electrodes
</label>
</div>
<div class="field">
<input type="radio" name="input_13b7c25f3b614f87802782045706b659_2_1" id="input_13b7c25f3b614f87802782045706b659_2_1_choice_1" class="field-input input-radio" value="choice_1"/><label id="13b7c25f3b614f87802782045706b659_2_1-choice_1-label" for="input_13b7c25f3b614f87802782045706b659_2_1_choice_1" class="response-label field-label label-inline" aria-describedby="status_13b7c25f3b614f87802782045706b659_2_1"> it is generated using transformer action
</label>
</div>
<div class="field">
<input type="radio" name="input_13b7c25f3b614f87802782045706b659_2_1" id="input_13b7c25f3b614f87802782045706b659_2_1_choice_2" class="field-input input-radio" value="choice_2"/><label id="13b7c25f3b614f87802782045706b659_2_1-choice_2-label" for="input_13b7c25f3b614f87802782045706b659_2_1_choice_2" class="response-label field-label label-inline" aria-describedby="status_13b7c25f3b614f87802782045706b659_2_1"> it is generated using external magnets
</label>
</div>
<span id="answer_13b7c25f3b614f87802782045706b659_2_1"/>
</fieldset>
<div class="indicator-container">
<span class="status unanswered" id="status_13b7c25f3b614f87802782045706b659_2_1" data-tooltip="Not yet answered.">
<span class="sr">unanswered</span><span class="status-icon" aria-hidden="true"/>
</span>
</div>
</div></div>
</div>
<div class="action">
<input type="hidden" name="problem_id" value="Assessment 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_13b7c25f3b614f87802782045706b659" >
<span class="submit-label">Submit</span>
</button>
<div class="submission-feedback" id="submission_feedback_13b7c25f3b614f87802782045706b659">
<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="13b7c25f3b614f87802782045706b659-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="13b7c25f3b614f87802782045706b659-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="13b7c25f3b614f87802782045706b659-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="True">
<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 class="vert vert-3" data-id="block-v1:MITx+22.011x+3T2018+type@problem+block@6b6d3f88a44e4f6abb3774c3ff42b00e">
<div class="xblock xblock-public_view xblock-public_view-problem xmodule_display xmodule_ProblemBlock" data-init="XBlockToXModuleShim" data-runtime-version="1" data-graded="True" data-has-score="True" data-usage-id="block-v1:MITx+22.011x+3T2018+type@problem+block@6b6d3f88a44e4f6abb3774c3ff42b00e" data-runtime-class="LmsRuntime" data-request-token="d1c9355851dd11ecbe401652d7ed4529" data-block-type="problem" data-course-id="course-v1:MITx+22.011x+3T2018">
<script type="json/xblock-args" class="xblock-json-init-args">
{"xmodule-type": "Problem"}
</script>
<div id="problem_6b6d3f88a44e4f6abb3774c3ff42b00e" class="problems-wrapper" role="group"
aria-labelledby="6b6d3f88a44e4f6abb3774c3ff42b00e-problem-title"
data-problem-id="block-v1:MITx+22.011x+3T2018+type@problem+block@6b6d3f88a44e4f6abb3774c3ff42b00e" data-url="/courses/course-v1:MITx+22.011x+3T2018/xblock/block-v1:MITx+22.011x+3T2018+type@problem+block@6b6d3f88a44e4f6abb3774c3ff42b00e/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="6b6d3f88a44e4f6abb3774c3ff42b00e-problem-title" aria-describedby="block-v1:MITx+22.011x+3T2018+type@problem+block@6b6d3f88a44e4f6abb3774c3ff42b00e-problem-progress" tabindex="-1">
Assessment 4
</h3>
<div class="problem-progress" id="block-v1:MITx+22.011x+3T2018+type@problem+block@6b6d3f88a44e4f6abb3774c3ff42b00e-problem-progress"></div>
<div class="problem">
<div>
<div class="wrapper-problem-response" tabindex="-1" aria-label="Question 1" role="group"><div class="choicegroup capa_inputtype" id="inputtype_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1">
<fieldset aria-describedby="status_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1">
<legend id="6b6d3f88a44e4f6abb3774c3ff42b00e_2_1-legend" class="response-fieldset-legend field-group-hd">In a tokamak, two of the three magnetic fields needed to confine the plasma (toroidal, poloidal, vertical) are generated using</legend>
<div class="field">
<input type="radio" name="input_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1" id="input_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1_choice_0" class="field-input input-radio" value="choice_0"/><label id="6b6d3f88a44e4f6abb3774c3ff42b00e_2_1-choice_0-label" for="input_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1_choice_0" class="response-label field-label label-inline" aria-describedby="status_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1"> The vertical field. It is caused by the plasma current.
</label>
</div>
<div class="field">
<input type="radio" name="input_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1" id="input_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1_choice_1" class="field-input input-radio" value="choice_1"/><label id="6b6d3f88a44e4f6abb3774c3ff42b00e_2_1-choice_1-label" for="input_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1_choice_1" class="response-label field-label label-inline" aria-describedby="status_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1"> The poloidal field. It is caused by the plasma current.
</label>
</div>
<div class="field">
<input type="radio" name="input_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1" id="input_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1_choice_2" class="field-input input-radio" value="choice_2"/><label id="6b6d3f88a44e4f6abb3774c3ff42b00e_2_1-choice_2-label" for="input_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1_choice_2" class="response-label field-label label-inline" aria-describedby="status_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1"> The toroidal field. It is caused by the plasma current.
</label>
</div>
<span id="answer_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1"/>
</fieldset>
<div class="indicator-container">
<span class="status unanswered" id="status_6b6d3f88a44e4f6abb3774c3ff42b00e_2_1" data-tooltip="Not yet answered.">
<span class="sr">unanswered</span><span class="status-icon" aria-hidden="true"/>
</span>
</div>
</div></div>
</div>
<div class="action">
<input type="hidden" name="problem_id" value="Assessment 4" />
<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_6b6d3f88a44e4f6abb3774c3ff42b00e" >
<span class="submit-label">Submit</span>
</button>
<div class="submission-feedback" id="submission_feedback_6b6d3f88a44e4f6abb3774c3ff42b00e">
<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="6b6d3f88a44e4f6abb3774c3ff42b00e-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="6b6d3f88a44e4f6abb3774c3ff42b00e-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="6b6d3f88a44e4f6abb3774c3ff42b00e-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="True">
<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