Question

An insulator plate is passed between the plates of a capacitor. Then current

• A. first flows from A to B and then from B to A
• B. first flows from B to A and then from A to B
• C. always flows from B to A
• D. always flows from A to B

Answer 1

Answer: (B)

first flows from B to A and then from A to B

Answer 2

As insulator plate is passed between the plates of the capacitor, its capacity increases first and then decreases as the plate slips out. As a result, positive charge on plate A increases first and then decreases, hence current in outer circuit flows from B to A and then from A to B.