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Which of the following is the SI unit of...

Which of the following is the `SI` unit of poynting vector ?

A

`WS^(-1)`

B

`Wm^(-2)`

C

`Wm^(-2)s^(-1)`

D

`Wm^(-3)s^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
Here by definition
The poynting Vector is `("Power")/("area").`
`:.` Its units are watts per `m^(2)`
`:.Wm^(-2)` is the correct.
Hence `(b)` is the right choice.
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