Question

The ratio of initial to final current through the battery when the switch is closed in the figure.

• A. Zero
• B. $\infty$
• C. $\frac{4}{3}$
• D. $\frac{3}{4}$

Answer 1

The correct option is D $\frac{3}{4}$

At t=0 , switch closed,

$I_1=\frac{E}{2R}$

At steady state after s closed

$I_2=\frac{E}{\frac{3}{2}R}=\frac{2E}{3R}$

Ratio $\frac{I_1}{I_2}=\frac{3}{4}$