Question

A fiat circular coil, carrying a current, has a magnetic moment $\mu$

• A. $\mu$ has only magnitude; it does not have direction
• B. the direction of $\mu$ is along the normal to the plane of the coil
• C. the direction of $\mu$ depends on the direction of the current flow
• D. the direction of $\mu$ does not change if the current in the coil is reversed

Answer 1

Answer: (B), (C)

the direction of $\mu$ is along the normal to the plane of the coil
the direction of $\mu$ depends on the direction of the current flow

The area vector $\overrightarrow{A}$ is upward if the current in the loop is anti-clockwise and downward if the current in the loop is clockwise.