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<p> Now that we know about capacitors, we can modify them by adding dielectrics.</p><p> Textbook Links </p><ul><li><a href="/courses/course-v1:MITx+8.02.1x+1T2019/pdfbook/0/chapter/5/13">Chapter 5.4 Dielectrics</a></li></ul>
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<h2 class="hd hd-2 unit-title">L13Q1: Insert Dielectric with Battery Disconnected - Charge</h2>
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Insert Dielectric with Battery Disconnected, Charge
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A parallel plate capacitor is charged with a battery to a total charge [mathjaxinline]Q[/mathjaxinline] on the positive plate and the battery is removed. A slab of material with dielectric constant [mathjaxinline]\kappa[/mathjaxinline] is inserted between the plates. The charge on the positive plate of the capacitor </p>
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<h2 class="hd hd-2 unit-title">L13v2: Capacitor Demo</h2>
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<p>
In the first part of this video the difference in potential between the plates of a parallel plate capacitor is measured while the distance between the plates is changed when the battery is disconnected, and when the battery is connected to the plates.
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In the second part, the difference in potential between the plates of the capacitor is measured while a dielectric is inserted between the plates when the battery is disconnected, and when the battery is connected to the plates.
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<h2 class="hd hd-2 unit-title">L13Q2: Insert Dielectric with Battery Disconnected - Potential Difference</h2>
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Insert Dielectric with Battery Disonnected, Potential Difference
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A parallel plate capacitor is charged with a battery to a total charge [mathjaxinline]Q[/mathjaxinline] on the positive plate and the battery is removed. A slab of material with dielectric constant [mathjaxinline]\kappa[/mathjaxinline] is inserted between the plates. The grey circle represents a meter which measures the voltage between the top and bottom plates. It is not a battery that supplies voltage or a wire connecting the two plates. The potential difference [mathjaxinline]V[/mathjaxinline] across the plates of the capacitor </p>
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<h2 class="hd hd-2 unit-title">L13v3: Dielectric Constant</h2>
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<h2 class="hd hd-2 unit-title">L13Q3: Dielectric Capacitor Energy 1</h2>
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Dielectric Capacitor Energy I
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A parallel plate capacitor is charged to a total charge [mathjaxinline]Q[/mathjaxinline] and the battery is disconnected. A slab of material with dielectric constant [mathjaxinline]\kappa[/mathjaxinline] is inserted between the plates. The energy stored in the capacitor </p>
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<img src="/assets/courseware/v1/6bab8779ec0deec665b372d993e23bdc/asset-v1:MITx+8.02.1x+1T2019+type@asset+block/images_checkpoint_w5_2_1.png" width="550"/>
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<h2 class="hd hd-2 unit-title">L13Q4: Dielectric Capacitor Energy 2</h2>
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Dielectric Capacitor Energy II
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A parallel plate capacitor is charged to a total charge [mathjaxinline]Q[/mathjaxinline]. While the battery is still connected a slab of material with dielectric constant [mathjaxinline]\kappa[/mathjaxinline] is inserted between the plates. The energy stored in the capacitor </p>
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<h2 class="hd hd-2 unit-title">L13v4: Dissectible Capacitor</h2>
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<h3 class="hd hd-2">L13v04: Dissectible Capacitor</h3>
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<h3 class="hd hd-4 downloads-heading sr" id="video-download-transcripts_L13v04">Downloads and transcripts</h3>
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<h4 class="hd hd-5">Transcripts</h4>
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<a class="btn btn-link" href="/courses/course-v1:MITx+8.02.1x+1T2019/xblock/block-v1:MITx+8.02.1x+1T2019+type@video+block@L13v04/handler/transcript/download" data-value="srt">Download SubRip (.srt) file</a>
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