Question

a coil has 1000 turns each of area 0.5m^2 what is the magnetic moment of the coil when it carries a current of 1ma

Answer 1

Answer:

magnetic moment = NIA = 1000×0.5×1×(10^-3)

= 0.5 A/m2

Answer 2

Given:

The number of turns in the coil (N) = 1000

The area of each turn (A) = 0.5m²

The current in the coil (I) = 1mA

To Find:

The magnetic moment of the coil

Solution:

The magnetic moment (M) or magnetic dipole moment is a vector quantity. It measures the object's tendency to align in direction of the external magnetic field.

According to the formula,

M = NIA

Here, N is the number of turns in the coil

I is the current flowing through the coil

and A is the area of the coil

Substituting,

M = 1000 X 10⁻³ X 0.5

(1mA = 10⁻³ A)

or M = 0.5 Am²

The direction of magnetic moment can be found out by curling the fingers of our right hand in the direction of the current. The thumb in this situation points in the direction of the magnetic moment.

Hence, the magnetic moment of the coil is 0.5 Am².