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The expression for intrinsic impedance is given by(a) √(με)(b) (με)(c) √(μ/ε)(d) (μ/ε)This question was addressed to me by my college professor while I was bunking the class.My question comes from Plane Waves in Dielectrics in section EM Wave Propagation of Electromagnetic Theory

Answer»

The correct option is (c) √(μ/ε)

The EXPLANATION is: The intrinsic impedance is given by the ratio of square ROOT of the PERMITTIVITY to the permeability. Thus η = √(μ/ε) is the intrinsic impedance. In free space or air medium, the intrinsic impedance will be 120π or 377 OHMS.



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