Question 88: EM waves

Question

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 :

Accepted Answer

$${Z_C} = {V \over I}$$
$$ \Rightarrow {1 \over {\omega C}} = {{230} \over {6.9}}\,M\,\Omega $$
$$ \Rightarrow C = {{6.9} \over {230\,\omega }}\,\mu F$$
$$ = {{6.9} \over {230 	imes 600}}\,\mu F$$
$$C = 50\,pF$$

Answer

5 pF

Answer

50 pF

Answer

100 pF

Answer

200 pF

EM waves

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 :

Choose the correct answer: