8.Electromagnetic waves
easy

In a plane electromagnetic wave, which of the following has/ have zero average/value in one complete cycle?

$(a)$ Magnetic field

$(b)$ Magnetic energy

$(c)$ Electric field

$(d)$ Electric energy

A

$(a), (c)$

B

$(b), (c)$

C

$(a), (d)$

D

All of these

Solution

(a)

Both $\vec{E}$ and $\vec{B}$ are sinusoidal, so over a complete cycle, its value will be zero.

Standard 12
Physics

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