Question

In the figure shown, a circuit contains two identical resistors with resistance $R=5\Omega$ and an inductance with $L=2mH$. An ideal battery of $15V$ is connected in the circuit. What will be the current through the battery long after the switch is closed?

• A. $6A$
• B. $7.5A$
• C. $5.5A$
• D. $3A$

Answer 1

Answer: (A)

$6A$

Ideal inductor will behave like zero resistance long time after switch is closed
$I=\frac{2\epsilon }{R}=\frac{2\times 15}{5}=6A$