Concepts Of Physics MCQ Edition [Volume 2]PhysicsPhotoelectric Effect and Wave–Particle Duality
The dimensions of the Planck constant are identical to those of
Options
- Aforce distance time
- Bforce time
- Cforce speed
- Dforce distance
Correct answer
A. force distance time
Step-by-step solution
From the relation E = h , the dimensions of the Planck constant h are given by [h] = [E] [ ] = [M L^2 T⁻²] [T⁻¹] = [M L^2 T⁻¹] Evaluating the dimensions of the given options: Force distance time = [M L T⁻²] [L] [T] = [M L^2 T⁻¹] Force time = [M L T⁻²] [T] = [M L T⁻¹] Force speed = [M L T⁻²] [L T⁻¹] = [M L^2 T⁻³] Force distance = [M L T⁻²] [L] = [M L^2 T⁻²] The dimensions of the Planck constant match those of force distance time.