Question

Following figures show the arrangement of bar magnetism in different configurations. Each magnet has magnetic dipole moment $\overrightarrow{m}$ . Which configuration has highest net magnetic dipole moment ?

• A.
• B.
• C.
• D.

Answer 1

The correct option is C

Net magnetic moment$=\sqrt{m_1^2+m_2^2+2m_1{m}_2\cos \theta }$
So out of the given configuration $C$ has the maximum net dipole magnetic moment as $\cos \theta$ is decreasing function.