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Speed of electromagnetic wave in a transparent dielectric medium is $2 x 10^{8} m / s$ . Relative permeability for the medium is 1. Then, find its relative permittivity.

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4.2

6.25

2.25

3.25

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detailed solution

Correct option is C

Refractive index of the medium is, n=cv=3 x 1082 x 108=1.5Now, μr.εr=n⇒εr=n2μr=1.521=2.25

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Speed of electromagnetic wave in a transparent dielectric medium is 2 x 108 m/s. Relative permeability for the medium is 1. Then, find its relative permittivity.

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Speed of electromagnetic wave in a transparent dielectric medium is $2 x 10^{8} m / s$ . Relative permeability for the medium is 1. Then, find its relative permittivity.