Question

‘X’ is the product of the pole strength of either magnetic pole and the magnetic length of the magnetic dipole. Identify X.

(a) Magnetic dipole

(b) Magnetic dipole moment

(c) Magnetic pole strength

(d) Magnetic dipole length

This question was posed to me during an online exam.

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

Answer 1

Correct answer is (b) Magnetic dipole moment

To explain I would say: The product of the pole strength of either magnetic pole and the magnetic length of the magnetic dipole is called its magnetic dipole moment. The SI unit of magnetic dipole moment is Am^2.