2016 · Q20
Which one of the following physical quantities has the same dimensions as that of Planck’s constant h?
General KnowledgePhysics
- ALinear momentum
- BAngular momentum
- CForce
- DPotential energy
Explanation
Planck's constant h has dimensions of [ML^2T^-1] (energy × time, or action), which are exactly the dimensions of angular momentum. Linear momentum is [MLT^-1], force [MLT^-2], and energy [ML^2T^-2] — all different from h.