In an electromagnetic wave, the electric and magnetising fields are 100V mȡ

Question

In an electromagnetic wave, the electric and magnetising fields are 100V

m^{- 1}

and 0.265

A m^{- 1}

. The maximum energy flow is

Options:

A . 26.5 W/m2

B . 36.5 W/m2

C . 46.7 W/m2

D . 765 W/m2

Answer: Option A
:
A
Here

E_{0} = 100 V / m, B_{0} = 0.265

A/m.

∴

Maximum rate of energy flow

S = E_{0} \times B_{0}

= 100 \times .265 = 26.5 \frac{W}{m^{2}}

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