JEE Main 2021PhysicsMathematics in PhysicsMediumMCQ

JEE Main 2021 — Mathematics in Physics Question with Solution

JEE Main 2021 (27 Jul Shift 2)

Question

A physical quantity y is represented by the formula y=m2r-4 gxl-32 If the percentage errors found in y, m, r, l and g are 18, 1, 0.5, 4 and p respectively, then find the value of x and p.

Choose an option

Show full solutionCorrect option: C
Correct answer
C163 and ±32

Step-by-step explanation

Δyy=2Δmm+4Δrr+xΔgg+32Δll

18=2(1)+4(0.5)+xp+32(4)

8=xp

By checking from options.

x=163, p=±32

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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.