Question

If for a material, the magnetization is 8 X 10^5 A/m and the relative permeability is 200, what is the Magnetic Intensity?

(a) 4.89 X 10^3 A/m

(b) 4.64 X 10^3 A/m

(c) 4.43 X 10^3 A/m

(d) 4.02 X 10^3 A/m

I got this question during an interview for a job.

This intriguing question comes from Parameters topic in portion Magnetic Properties of Materials of Engineering Physics II

Answer 1

Right option is (d) 4.02 X 10^3 A/m

The explanation: Magnetization is given by: M = (μr – 1) H

8 X 10^5 = 199 X H

H = 4.02 X 10^3 A/m.