Question Detail

PHY 101 Physical Quantities And Units Objective Question

Question

Which of the following pairs of physical quantities does not have the same dimensional formula?
Options
A Work and torque
B Angular momentum and Planck’s constant
C Tension and surface tension
Correct Answer
D Impulse and linear momentum
Correct Answer

Option C is the correct answer.

Detailed Explanation

Tension is force [MLT⁻²]. Surface tension is force per length [MT⁻²]. Others: work and torque both [ML²T⁻²]; angular momentum and Planck's constant both [ML²T⁻¹]; impulse and momentum both [MLT⁻¹].

Hint

Surface tension has an extra L⁻¹ compared to tension.

Question Info