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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceSingle correctEasyApplication

JEE Main 30 July 2022, Shift 2, Physics Q9

Question 9 of 90 in this shift, Physics question 9 of 30, Section A.

An oscillating simple pendulum of time period To\mathrm{T_o} is placed in a lift which is accelerating upwards with 2.5 m/s22.5\ \mathrm{m/s^2} . The time period of pendulum in the lift will be (if g = 10 m/s210\ \mathrm{m/s^2})
  1. (1)To\mathrm{T_o}
  2. (2)25 To\frac{2}{\sqrt{5}}\,\mathrm{T_o}Official answer
  3. (3)23 To\frac{2}{\sqrt{3}}\,\mathrm{T_o}
  4. (4)To4\frac{\mathrm{T_o}}{4}

Official answer

Option 2

NTA final key.

Same idea in other shifts

Asked 2× in all
  1. 26 Jun 2022, Shift 1 · Q38Time period of a simple pendulum in a stationary lift is 'T'. If the lift accelerates with g6\frac{g}{6} vertically upwards then the time…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 108 of the 174 JEE Main shifts held from 2017 to 2026.