Q.

Which of the following has/have zero average value in a plane electromagnetic wave?

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a

Both magnetic and electric field

b

Electric field only

c

Magnetic energy

d

Electric energy

answer is A.

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Detailed Solution

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.

 

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Which of the following has/have zero average value in a plane electromagnetic wave?