First slide

Time -Varying current in L-R circuit

Question

In which of the following circuits is the current maximum just after the switch S is closed?

Moderate

A

(i)
B

(ii)
C

(iii)
D

Both (ii) and (iii)

Solution

At t = 0 current through L is zero so it acts as open circuit. The given figures can be redrawn as follows.
$i_{1} = 0; i_{2} = \frac{E}{R} i_{3} = \frac{E}{2 R}$
Hence, $i_{2} > i_{3} > i_{1}$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App