Question

Dimensions of planck's constant is equal to that of

• A. force
• B. angular momentum
• C. energy
• D. frequency

Answer 1

Answer: (B)

angular momentum

Answer 2

As, $E=h\upsilon$ or $h=\frac{E}{\upsilon}$ $=\frac{\left[ML^{2}T^{-2}\right]}{\left[T^{-1}\right]}=\left[ML^{2}T^{-1}\right]$ Dimensions of angular momentum, $L=I\omega$ $=\left[ML^{2}T^{-1}\right]$