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Friday, 9 October

JEE Main 2022 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 24 June 2022, Shift 1, Physics Q41

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

A resistance of 40 Ω40\ \Omega is connected to a source of alternating current rated 220 V, 50 Hz. Find the time taken by the current to change from its maximum value to the rms value :
  1. (1)2.5 msOfficial answer
  2. (2)1.25 ms
  3. (3)2.5 s
  4. (4)0.25 s

Official answer

Option 1

NTA final key (2022 Session 1).

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

Same idea in other shifts

Asked 2× in all
  1. 18 Mar 2021, Shift 1 · Q6An AC source rated 220 V, 50 Hz is connected to a resistor. The time taken by the current to change from its maximum to the rms value is :EasySingle 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 42 of the 174 JEE Main shifts held from 2017 to 2026.