Question

Identify the factor on which the torque on a planar current loop does not depend.

(a) Current

(b) Strength of magnetic field

(c) Area of the loop

(d) The shape of the loop

The question was asked in an international level competition.

I want to ask this question from Torque on Current Loop & Magnetic Dipole in chapter Moving Charges and Magnetism of Physics – Class 12

Answer 1

The correct answer is (d) The shape of the loop

For explanation I would say: Torque on a planar current loop depends upon current, the strength of the magnetic field, area of the loop and the orientation of the loop in the magnetic field. It is independent of the shape of the loop.