Alternating Current - Result Question 14

14. Figure shows a circuit that contains three identical resistors with resistance R=9.0Ω each, two identical inductors with inductance L=2.0 mH each, and an ideal battery with emf ε=18V. The current ’ i ’ through the battery just after the switch closed is

[2017]

(a) 0.2A

(b) 2A

(c) 0

(d) 2mA

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Answer:

Correct Answer: 14. (b)

Solution:

  1. (b)

At t=0, no current flows through R1 and R3

Current through battery just after the switch closed is

i=εR2=189=2A



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