In an electromagnetic wave, electric and magnetising fields are 100,V,{m^{ - 1}} and 0.265,A,{m^{ -

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8.Electromagnetic waves

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In an electromagnetic wave, the electric and magnetising fields are $100\,V\,{m^{ - 1}}$ and $0.265\,A\,{m^{ - 1}}$. The maximum energy flow is.......$W/{m^2}$

A

$26.5$

B

$36.5$

C

$46.7$

D

$765$

Solution

(a) Here ${E_0} = 100\;V/m,$${B_0} = 0.265\;A/m.$
Maximum rate of energy flow $S =$ ${E_0} \times {B_0}$
= $100 \times .265 = 26.5\frac{W}{{{m^2}}}$

Standard 12

Physics

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