Question

What is the dimensional formula for torque?

(a) [ML^2T^-2]

(b) [MLT^-2]

(c) [M^1L^2T^-3]

(d) [LT^-2]

This question was posed to me during a job interview.

The above asked question is from Dynamics topic in section Dynamics of Electrical Drives of Electric Drives

Answer 1

The correct choice is (a) [ML^2T^-2]

For explanation: Torque is a vector product of force and displacement. Dimensional formula for force is [MLT^-2] and displacement is [L] so dimensional formula for torque is [MLT^-2] [L] = [ML^2T^-2].