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Question

The poynting vector for an electromagnetic wave is :

A
S=E×H
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B
S=E×B
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C
S=(E×H)/2
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D
S=(E×B)/2
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Solution

The correct option is A S=E×H
Poynting vector is defined as S=E×H.
It represents the directional energy flux density(rate of energy flux per unit area) of an electromagnetic field.

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