Question

In the given circuit, the potential difference across the capacitor is 12 V in steady state. Each resistor have $3\Omega$ resistance. The emf of the ideal battery is

• A. 15 V
• B. 9 V
• C. 12 V
• D. 24 V

Answer 1

The correct option is A

15 V

In steady state current will not flow from the capacitor.
If emf of battery is $v_0$, then potential difference between A and B
$V_A-V_B=\frac{0.4v_0}{5}=12V\Rightarrow v_0=15V$