JEE Main 2021PhysicsMathematics in PhysicsEasyMCQ

JEE Main 2021 — Mathematics in Physics Question with Solution

JEE Main 2021 (26 Aug Shift 2)

Question

If the length of the pendulum in pendulum clock increases by 0.1%, then the error in time per day is:

Choose an option

Show full solutionCorrect option: A
Correct answer
A43.2 s

Step-by-step explanation

T=2πlg

T∝l12

ΔTT=12Δll

ΔT24×3600=12×0.1100

ΔT=12×0.1100×24×3600

ΔT=43.2 s

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About this question

This is a previous-year question from JEE Main 2021, covering the Mathematics in Physics 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.