Question

A capacitor is charged with a battery and energy stored is U After disconnecting battery another capacitor of same capacity is connected in parallel to the first capacitor. Then energy stored in each capacitor is

(a) U/2

(b) U/4

(c) 4U

(d) 2U

Answer 1

Correct option (b) U/4

Explanation:

Let q be the charge on each capacitor.

Now, when battery is disconnected and another capacitor of same capacity is connected in parallel to the first capacitor, then voltage across each capacitor, V = q/2C