Question

Which of the following is NOT true of electromagnetic waves?

A. An electric field is created in any region of space in which a magnetic field is changing with time.

B. A magnetic field is created in any region of space in which an electric field is changing with time.

C. Induction of electric fields by changing magnetic fields occurs only if a conducting material is present.

D. Induction of magnetic fields by changing magnetic fields occurs even in the absence of a conducting material

Answer 1

I'd say D because changing magnetic fields induce a counter magnetic field in conductors (through Lenz's Law) through eddy currents and nonconductors can not produce eddy currents, being nonconductors.

Answer 2

thank you for explaining

Answer 3

yw