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Question: A circular parallel plate capacitor of radius R and distance d between the plate is given. A capacit...

A circular parallel plate capacitor of radius R and distance d between the plate is given. A capacitor is being charged with a current I flowing through the wire. Neglect fringing effect.

What is the rate of change of electric flux through plane in middle of capacitor with respect to time (i.e. ) –

A

B

C

4Iε0\frac { 4 \mathrm { I } } { \varepsilon _ { 0 } }

D

6Iε0\frac { 6 \mathrm { I } } { \varepsilon _ { 0 } }

Answer

Explanation

Solution

f = QAε0×A\frac { \mathrm { Q } } { \mathrm { A } \varepsilon _ { 0 } } \times \mathrm { A }

f =

= 1ε0\frac { 1 } { \varepsilon _ { 0 } } × = Iε0\frac { \mathrm { I } } { \varepsilon _ { 0 } }