JEE Main 2020PhysicsAlternating CurrentHardMCQ

JEE Main 2020 — Alternating Current Question with Solution

JEE Main 2020 (08 Jan Shift 2)

Question


As shown in the figure, a battery of emf ∈ is connected to an inductor L and resistance R in series. The switch is closed at t=0. The total charge that flows from the battery, between t=0 and t=tc ( tc is the time constant of the circuit) is:

Choose an option

Show full solutionCorrect option: A
Correct answer
A∈LeR2

Step-by-step explanation

q=∫0Tcidt
=∈Rt-e-tTc-1Tc0Tc=∈RTc+Tce-1-Tc
=∈R×1e×LR

 q=∈LR2e

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About this question

This is a previous-year question from JEE Main 2020, 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.