Question

Current drawn from the battery, just after switch $S$ is closed is,

• A. $\frac{2V}{3R}$
  
• B. $\frac{3V}{2R}$
  
• C. $\frac{2V}{R}$
  
• D. $\frac{V}{R}$
  

Answer 1

The correct option is A $\frac{2V}{3R}$


Just after closing the switch $S$, the uncharged capacitor will act as a zero resistance wire
$\Rightarrow R_{eq}=R+\frac{R}{2}=\frac{3R}{2}$

The current drawn from the battery is,
$i=\frac{V}{R_{eq}}=\frac{2V}{3R}$

Hence, $\left(A\right)$ is the correct answer.