# 5.8(a) A closely wound solenoid of 2000 turns and area of cross-section $1.6 \times 10 ^{-4} m^2$ , carrying a current of 4.0 A, is suspended through its centre allowing it to turn in a horizontal plane. What is the magnetic moment associated with the solenoid?

Answers (1)
H Harsh Kankaria

Given,

Number of turns, N = 2000

Area of the cross-section of the solenoid, $A = 1.6$$\dpi{100} 10^{-4} m^2$

Current in the solenoid, I = 4 A

We know, The magnetic moment along the axis of the solenoid is:

m = NIA

= (2000)(4 A)(1.6 x $\dpi{100} 10^{-4} m^2$)

= 1.28 $\dpi{100} Am^2$

Exams
Articles
Questions