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. $2 M_0$

Answer 1

Answer: (C)

$\sqrt{3} M_0$

Answer 2

$M_{\text{net}} = \sqrt{M_{0}^{2} + M_{0}^{2} + 2 M_{0}^{2} \cos 60^{\circ}}$ $=\sqrt{3M_{0}^{2}} = \sqrt{3} M_{0}$