JEE Main 2019PhysicsAlternating CurrentEasyMCQ

JEE Main 2019 — Alternating Current Question with Solution

JEE Main 2019 (12 Jan Shift 1)

Question

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

Choose an option

Show full solutionCorrect option: B
Correct answer
B6 A

Step-by-step explanation



After a long time, when the growth of current in the circuit has stopped, the inductor will work as a conductor. Therefore the effective resistance of the circuit will be, 

R=52=2.5 Ω

Hence, the current through the circuit will be,

I=VR=152.5=6A

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About this question

This is a previous-year question from JEE Main 2019, covering the Alternating Current chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.