Question

Under which of these conditions, the torque acting on the current carrying loop is minimum?

(a) θ = 0^o

(b) θ = 90^o

(c) θ = 270^o

(d) θ = 450^o

The question was asked by my college director while I was bunking the class.

The above asked question is from Torque on Current Loop & Magnetic Dipole topic in chapter Moving Charges and Magnetism of Physics – Class 12

Answer 1

Right option is (a) θ = 0^o

For explanation I would say: When θ = 0^o ➔ τ = 0.

The torque is minimum when the plane of the loop is perpendicular to the magnetic field, so the angle θ should be 0^o.