Question

A solenoid has core of a material with relative permeability 500 and its windings carry a current of 2 A. The number of turns of the solenoid is 500 per metre. The magnetization of the material is ______.

Options

• 500 × 10^-3 Am^-1

• 499 × 10³ Am^-1

• 499 × 10^-3 Am^-1

• 500 × 10⁵ Am^-1

Answer 1

A solenoid has core of a material with relative permeability 500 and its windings carry a current of 2 A. The number of turns of the solenoid is 500 per metre. The magnetization of the material is 499 × 10³ Am^-1.

Explanation:

Magnetic intensity,

H = nI = 500 × 2 = 1000 Am^-1

µ_r = 1+ x ⇒ x = (µ_r-1)

∴ M= xH= (µ_r-1) H

=(500-1) × 1000

=499 ×10³ Am^-1