Question

In metals which of the following equation will hold good?

(a) Curl(H) = J

(b) Curl(J) = dD/dt

(c) Curl(H) = D

(d) Curl(J) = dB/dt

I had been asked this question in an online interview.

Query is from Maxwell Law topic in section Magnetostics of Electromagnetic Theory

Answer 1

The correct answer is (a) Curl(H) = J

The best I can explain: Generally, the Curl(H) is the sum of two currents- conduction and displacement. In case of metals, it constitutes conduction J and in case of dielectrics, it constitutes the displacement current dD/dt.