Question

Find the susceptibility when the curie constant is 0.2 and the difference in critical temperature and paramagnetic curie temperature is 0.01.

(a) 2

(b) 20

(c) 0.02

(d) 200

This question was addressed to me in an interview for internship.

I'm obligated to ask this question of Magnetic Materials topic in chapter Magnetic Forces and Materials of Electromagnetic Theory

Answer 1

The correct choice is (b) 20

The best explanation: The susceptibility in magnetic materials is given by χm = C/(T-θ), where C is the curie constant, T is the critical temperature and θ is the paramagnetic curie temperature. Put C = 0.2 and T-θ = 0.01, thus we get susceptibility as 0.2/0.01 = 20.