JEE Main 2020PhysicsUnits and DimensionsEasyMCQ

JEE Main 2020 — Units and Dimensions Question with Solution

JEE Main 2020 (09 Jan Shift 1)

Question

A quantity f is given by f=hc5G where c is speed of light, G univasal gravitational constant and h is the Planck’s constant. Dimension of f is that of:

Choose an option

Show full solutionCorrect option: B
Correct answer
Benergy

Step-by-step explanation

hc=MLT-23
c=LT-1
G=M-1L3T-2

Substituting the dimensional formulas in the given formula,

f=ML2T-2

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About this question

This is a previous-year question from JEE Main 2020, covering the Units and Dimensions 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.