Q.

The pair (s) of physical quantities that do not have the same dimensions is

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a

volumetric strain and coefficient of friction

b

disintegration constant of a radioactive substance and frequency of light wave

c

heat and work

d

Planck's constant and torque.

answer is .

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Detailed Solution

Strain and coefficient of friction both are dimensionless, disintegration constant and frequency of light both have dimensions [T-1], heat and work  has  same units and dimensions.
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The pair (s) of physical quantities that do not have the same dimensions is