Question

The magnetic moment of a solenoid of 100 turns carry a current of 1 A and having an area of 0.01 $m^2$ is

• A. 20 $A{m}^2$
• B. 1 $A{m}^2$
• C. 0.1 $A{m}^2$
• D. Data insufficient

Answer 1

The correct option is B 1 $A{m}^2$

The magnetic moment of a solenoid is given by m = nIA here the number of turns, n = 100
the current, I = 1A
the area, A = 0.01 $m^2$
m = nIA
= 100 $\times$ 1 $\times$ 0.01
= 1 A $m^2$