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In an e.m. wave the electric and magneti...

In an e.m. wave the electric and magnetic fields are `200V//m` and `0.365A//m`. The maximum rate of energy flow is

A

`73.0W//m^2`

B

`36.5W//m^2`

C

`54.7W//m^2`

D

`77.8W//m^2`

Text Solution

Verified by Experts

The correct Answer is:
a
Here, amplitude of electric field `E_0=200V//m`,
amplitude of magnetism field `H_0=0.365A//m`
We know that the maximum rate of energy flow
`S=E_0B_0//mu=E_0xxH_0=200xx0.365`
`=73.0W//m^2`
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