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<div class="document" id="measuring-capacitance">
<h1 class="title">Measuring Capacitance</h1>

<p>Adding electric charge <strong>Q</strong> to an isolated body results in a potential difference <strong>V</strong> between that body and it's surroundings. The ratio Q/V is called it's capacitance <strong>C</strong>, given by the equation <span class="formula"><i>C</i> = <i>Q</i> ⁄ <i>V</i></span>. A capacitor is generally formed by two conducting surfaces separated by a non-conducting material. The capacitance is the ratio charge in one plate and the potential difference between the plates. The capacitance depends on the area of the plates, distance between them, dielectric constant of the separating material and the geometry of the plates.</p>
<p>For a parallel plate capacitor, <span class="formula"><i>C</i> = <span class="fraction"><span class="ignored">(</span><span class="numerator"><i>ϵ</i><sub>0</sub><i>ϵ</i><sub><i>r</i></sub><i>A</i></span><span class="ignored">)/(</span><span class="denominator"><i>d</i></span><span class="ignored">)</span></span></span>, where A is the area of the plates facing each other, d is the distance between plates, <span class="formula"><i>ϵ</i><sub><i>r</i></sub></span> is the dielectric constant of the material between the plates and <span class="formula"><i>ϵ</i><sub>0</sub></span> is the permittivity of free space whose value is <span class="formula">8.85418782 × 10<sup> − 12</sup><i>Fm</i><sup> − 1</sup></span>.</p>
<div class="section" id="objective">
<h1>Objective</h1>
<p>Measuring a capacitance using the IN1 terminal.</p>
<object data="schematics/cap-measure.svg" style="width: 300px;" type="image/svg+xml">
schematics/cap-measure.svg</object>
</div>
<div class="section" id="procedure">
<h1>Procedure</h1>
<ul class="simple">
<li>Connect the capacitor between IN1 and Ground.</li>
<li>Click on “Capacitance on IN1” . Should not touch the circuit while measuring.</li>
<li>Repeat with different values of capacitors, starting from <span class="formula">100<i>pF</i></span> to several micro Farads.</li>
</ul>
</div>
<div class="section" id="discussion">
<h1>Discussion</h1>
<p>You can make the capacitors by pasting thin metal foils on both sides of
insulators like paper, polythene or glass. It is possible to find out the dielectric constant of materials
by this method.</p>
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