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JEE Main 2022 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 27 June 2022, Shift 1, Physics Q41

Question 41 of 90 in this shift, Physics question 11 of 30, Section A.

The current flowing through an ac circuit is given by

I=5\sin(120\pi t)

A How long will the current take to reach the peak value starting from zero ?

(1) $\frac{1}{60}$ s
(2) $60$ s
(3) $\frac{1}{120}$ s
(4) $\frac{1}{240}$ sOfficial answer

Official answer

Option 4

NTA final key.

Chapter: Alternating Current
Topic: RMS and Peak Values
Idea tested: Time from Zero to Peak

Same idea in other shifts

Asked 2× in all

30 Jan 2024, Shift 2 · Q43An alternating voltage $V(t) = 220\sin 100\pi t$ volt is applied to a purely resistive load of $50\ \Omega$ . The time taken for the…MediumSingle correct

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.