Question

The dimensions of Planck constant equals to that of

• A. energy
• B. momentum
• C. angular momentum
• D. power

Answer 1

Answer: (C)

angular momentum

Answer 2

Dimensions of Planck constant $h=\frac{\text{Energy}}{\text{Frequency}}$
$=\frac{[ML^2T^{-2}]}{[T^{-1}]}$
$=[ML^2T^{-1}]$
Dimensions of angular momentum $L$
= Moment of inertia $I \times$ Angular velocity $\omega$
$=[ML^2][T^{-1}]$
$=[ML^2T^{-1}]$