JEE Main 2022 · 24 Jun · Shift 2 · Physics Q31 · Dronacharya Exams

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PhysicsSingle correct+4 / -1Question 31 of 90

Identify the pair of physical quantities that have same dimensions :

A

velocity gradient and decay constant

B

wien's constant and Stefan constant

C

angular frequency and angular momentum

D

wave number and Avogadro number

Answer and worked solution

Official answer: A

Check each pair.

Velocity gradient $dv/dx$ : $T^{-1}$ . Decay constant $\lambda$ : $T^{-1}$ . Same.
Wien's constant (m K) and Stefan's constant (W m $^{-2}$ K $^{-4}$ ): different.
Angular frequency ( $T^{-1}$ ) and angular momentum ( $ML^2T^{-1}$ ): different.
Wave number ( $L^{-1}$ ) and Avogadro number (mol $^{-1}$ ): different.

(A)

Topics:Dimensional analysis

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