Question

The net magnetic moment of two identical magnets each of magnetic moment $M_{0}$ , inclined at $60^\circ $ with each other is

• A. $M_{0}$
• B. $\sqrt{2} \, M_{0}$
• C. $\sqrt{3} \, M_{0}$
• D. $2M_{0}$

Answer 1

Answer: (C)

Magnetic dipole moment is a vector quantity.
$M_{n e t}= \, \sqrt{M_{0}^{2} + M_{0}^{2} + 2 M_{0}^{2} \, cos 60^{o}}$
$= \, \sqrt{3 M_{0}^{2}}= \, \sqrt{3} \, M_{0}$