Question

A flat circular coil carrying current has a magnetic moment $\mu$. Then ,
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

• A. a only is correct
• B. b and c only are correct
• C. d only is correct
• D. b and d only are correct

Answer 1

The correct option is B b and c only are correct

Magnetic moment $\left(\mu \right)=iA$
The magnetic moment can be considered to be a vector quantity with direction perpendicular to the current loop in the right-hand-rule direction where fingers curl in the direction of current flow