Question

The charge flowing through the cell on closing the key K is equal to

(a) CV/4

(b) 4CV

(c) 3CV/4

(d) 4CV/3

Answer 1

Correct option: (a) CV/4

Explanation: 

In the circuit C_net = 3C/4

When key K was open, charge stored in the capacitor was q_initial = 3CV/4

When key K is closed, capacitor 3C becomes short circuited and hence the new charge on C is q_final = CV

So, charge flowing is