Question

The unit of magnetic moment is

• A. $A-m^2$
• B. A-m
• C. $A-m^3$
• D. $kg-m^3$

Answer 1

Answer: (A)

Magnetic moment $(M)=NIA$ where $N=$ number of turn, $I=$ electron current, $A=$ area of cross-section of the coil $\therefore$ Unit of magnetic moment $=A-m^2$