COMEDK2024Evening ShiftPhysicsUnits and DimensionsActual
Joule second is the unit of
Options
- AAngular momentum
- BLinear momentum
- CPower
- DEnergy
Correct answer
A. Angular momentum
Step-by-step solution
The unit of energy is Joule (J) and the unit of time is second (s). The unit Joule second (J s) corresponds to the product of energy and time. From the relation E = h , where E is energy and is frequency, the unit of Planck constant h is J s⁻¹ = J s . Angular momentum L is defined as L = mvr . The dimensional formula for angular momentum is [M L^2 T⁻¹] . The dimensional formula for energy is [M L^2 T⁻²] . Multiplying by time T , we get [M L^2 T⁻²] [T] = [M L^2 T⁻¹] . Since the dimensions of energy multiplied by tim