Comprehension A circular parallel plate capacitor having plate radius \( R \) is charged by mean...

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Comprehension
A circular parallel plate capacitor having plate radius \( R \) is charged by means of a cell at time \( t=0 \). The variation of the current through the connecting wires with time is shown in figure.

Consider a plane circular area of radius \( R / 2 \) parallel to the plates and situated symmetrically between them. The displacement current through this area at time \( t=200 \mu \mathrm{s} \) is
(a) \( 0.135 i_{0} \)
(b) \( 0.092 i_{0} \)
(c) \( 0.068 i_{0} \)
(d) \( 0.034 i_{0} \)
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