Question

The pair of physical quantities having the same dimensional formula is:

• A. angular momentum and torque
• B. torque and strain energy
• C. entropy and power
• D. power and angular momentum

Answer 1

The correct option is B torque and strain energy

Angular momentum $=M^1{L}^2{T}^{-1}$
Torque $=M{L}^2{T}^{-2}$
Strain energy $=\frac{1}{2}\times M{L}^2{T}^{-2}$
Entropy $=M{L}^2{T}^{-2}{K}^{-1}$
Power $=M{L}^2{T}^{-3}$
Hence torque and strain energy has same dimensions,