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Q.

The relation between electric field E and magnetic field H in an EM wave is

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a

E = H

b

$E = \sqrt{\frac{μ_{0}}{ϵ_{0}}} H$

c

$E = \frac{μ_{0}}{ϵ_{0}} H$

d

$E = \sqrt{\frac{ϵ_{0}}{μ_{0}}} H$

answer is B.

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Detailed Solution

$In any e . m wave \frac{E}{B} = c$

$But B = μ_{0} H and c = \frac{1}{\sqrt{μ_{0} ε_{0}}}$

$Substituting \frac{E}{μ_{0} H} = \frac{1}{\sqrt{μ_{0} ε_{0}}}$

$E = \sqrt{\frac{μ_{0}}{ε_{0}}} H$

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