The rms value of conduction current in a parallel plate capacitor is $6.9 \,\mu \mathrm{A}$. The capacity of this capacitor, if it is connected to $230 \mathrm{~V}$ ac supply with an angular frequency of $600 \,\mathrm{rad} / \mathrm{s}$, will be :
Solution
<p>${Z_C} = {V \over I}$</p>
<p>$\Rightarrow {1 \over {\omega C}} = {{230} \over {6.9}}\,M\,\Omega$</p>
<p>$\Rightarrow C = {{6.9} \over {230\,\omega }}\,\mu F$</p>
<p>$= {{6.9} \over {230 \times 600}}\,\mu F$</p>
<p>$C = 50\,pF$</p>
About this question
Subject: Physics · Chapter: Electromagnetic Waves · Topic: Maxwell's Equations
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