Electromagnetic Induction and Alternating Current 4 Question 6

6. In the figure shown, a circuit contains two identical resistors with resistance R=5Ω 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?

(2019 Main, 12 Jan I)

(a) 6A

(b) 3A

(c) 5.5A

(d) 7.5A

Show Answer

Answer:

Correct Answer: 6. (a)

Solution:

  1. After a sufficiently long time, in steady state, resistance offered by inductor is zero. So, circuit is reduced to

Current in circuit is

I=EReq=155×55+5=15×25=6A



NCERT Chapter Video Solution

Dual Pane