Solution

Magnetic moment of a single current loop: $m = iA$.
For a coil of n turns, each turn contributes the same moment, so $M = niA$.
Its direction is along the axis of the coil, given by the right hand rule.

Concept Magnetic moment of a coil

Magnetic Dipole Moment of Current Loop in past papers

5 questions from this chapter have appeared across 5 exam years.