Question

Find the intensity of magnetization of a magnet of moment 4 Am² which weighs 50 gram. (Density of the material of a magnet = 5000 kg/m³)

Options

• 2 x 10⁵ A/m

• 4 x 10⁵ A/m

• 3 x 10⁵ A/m

• 10⁵ A/m

Answer 1

4 x 10⁵ A/m

Explanation:

`"I" = "M"/"V" = 4/("M"//rho)`

`= (4 xx 5000)/(50 xx 10^-3)`

`= 4 xx 10^-5  "A/m"`