Question

A dielectric slab is introduced between the plates of a capacitor in the manner as shown. Then current in outer circuit. 

(a) always flows from B to A 

(b) always flows from A to B 

(c) first flows from B to A and then from A to B 

(d) first flows from A to B and then from B to A

Answer 1

Correct option: (c) the energy stored in the capacitor is reduced.

Explanation: 

The capacitance of the capacitor increases initially and then decreases and hence the positive charge on plate A first increases and then decreases. Due to this the current in the outer circuit first flows from B to A and then from A to B.