JEE Main 2020 · PhysicsMultiple choiceSingle correctMediumMulti-step

JEE Main 9 January 2020, Shift 2, Physics Q15

Question 15 of 75 in this shift, Physics question 15 of 25, Section A.

In LC circuit the inductance

L = 40

mH and capacitance

C = 100\ \mu

F. If a voltage

V(t) = 10\sin(314\,t)

is applied to the circuit, the current in the circuit is given as :

(1) $0.52\sin 314\,t$
(2) $0.52\cos 314\,t$ Official answer
(3) $10\cos 314\,t$
(4) $5.2\cos 314\,t$

Official answer

Option 2

NTA final key (Jan 2020).

Chapter: Alternating Current
Topic: Phasor Diagrams
Idea tested: Phase Relations in RLC

Same idea in other shifts

Asked 8× in all

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Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.