Question

The magnetic moment of a square coil having 10 turns, each side measuring 2 cm and carrying a current of unit ampere is ____________.

विकल्प

• 20 x 10^-3 A m²

• 4 x 10^-3 A m²

• 4 A m²

• 16 x 10^-3 A m²

Answer 1

The magnetic moment of a square coil having 10 turns, each side measuring 2 cm and carrying a current of unit ampere is 4 x 10^-3 A m².

Explanation:

m = NIA = 10 x 1 x (2 x 10^-2)²

m = 4 x 10^-3 A m²