Q.

The pair(s) of physical quantities that has/have the same dimensions is(are)

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a

volumetric strain and coefficient of friction

b

disintegration constant of a radioactive substance and frequency of light wave

c

LATENT heat capacity and gravitational potential

d

Planck's constant and torque

answer is A.

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Detailed Solution

(1) Strain and coefficient of friction both are dimensionless(2) Disintegration constant and frequency of light both have dimensions [T-1](3) LATENT Heat capacity has unit cal/kg while gravitational potential has unit J/kg i.e. both have dimensions [L2T-2]
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The pair(s) of physical quantities that has/have the same dimensions is(are)