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Identify the pair of physical quantities which have different dimensions

Asked in JEE Main 24th June 1st Shift 2022 · Pairs with the same dimensions

Answer: (4) Specific heat capacity and latent heat

Step-by-step solution

Wave number and Rydberg's constant are both [L⁻¹].

Stress and the coefficient of elasticity are both [ML⁻¹T⁻²], because elasticity is stress over a dimensionless strain.

Coercivity and magnetisation are both [L⁻¹A].

Specific heat capacity is [L²T⁻²K⁻¹] while latent heat is [L²T⁻²]: they differ by a temperature, so this is the odd pair.

Why the other options are wrong

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