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Question

Choose the correct answer from the alternatives given.

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

A

Both magnetic and electric fields

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B

electric field only

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C

Magnetic field only

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D

None of these

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Solution

The correct option is A Both magnetic and electric fields
A. Both magnetic and electric field.

Because both electric and magnetic field oscillate as sine and cosine wave, which over one period, average value is zero.

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