A planar current loop of N turns, area A, carrying current I, has magn…

Question

A planar current loop of N turns, area A, carrying current I, has magnetic moment:

Accepted Answer

B. N I A

1. For a single-turn loop the magnetic moment is $m = IA$.
2. With $N$ closely wound turns the moments add: $m = NIA$.
3. Its direction is given by the right-hand thumb rule.
4. The units are A m², consistent with $N I A$.
_Source: NCERT Class 12 Physics Ch 4 "Moving Charges and Magnetism", p.157_

Answer

N I / A

Answer

I A / N

Answer

N A / I