Question

In a travelling plane electromagnetic wave, which of the following bare
zero average value?

(A) Magnetic energy and electric energy
B) Magnetic field and electric field
(C) Magnetic energy and magnetic field
(D) Electric energy and electric field​

Answer 1

Answer:

Both magnetic as well as electric field in EM waves are sinusoidal in nature and we know that the average value of sinusoidal wave is zero.

Hence, both magnetic and electric fields have zero average value in a plane EM wave.

means $\huge {Option\: B }$