Question

Which of the following have zero average value in a plane electromagnetic wave?
(i) Magnetic field
(ii) Electric field
(iii) Electric energy
(iv) Magnetic energy.

• A. (i) and (ii)
• B. (i) and (iv)
• C. (ii) and (iii)
• D. (iii) and (iv)

Answer 1

The correct option is A (i) and (ii)

Electric field has zero average value in electromagnetic waves