Question

Which of the following is correct for a flat 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 current flow
• D. The direction of $\mu$ does not change if the current in the coil is reversed

Answer 1

Answer: (B), (C)

The correct options are
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 current flow

A flat circular coil carrying a current has a magnetic moment . The direction of it depends on the direction of the current and can be determined by right handed screw rule. It will be always perpendicular to the plane of the coil.