First slide

Dimensions of physical quantities

Question

Which of the following pairs has same dimensions?

Easy

A

Current density and charge density
B

Angular momentum and momentum
C

Spring constant and surface energy
D

Force and torque

Solution

Spring constant $= \frac{F}{L} = [M L^{0} T^{- 2}]$
Surface energy $= \frac{E n e r g y}{A r e a} = [M L^{0} T^{- 2}]$

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