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In free space, which of the following will be zero?(a) Permittivity(b) Permeability(c) Conductivity(d) ResistivityThe question was posed to me in unit test.I'd like to ask this question from Displacement and Conduction Current in portion Electric Fields in Material Space of Electromagnetic Theory

Answer»

Correct answer is (C) Conductivity

The explanation is: In free SPACE, ε = ε0 and μ = μ0. The relative PERMITTIVITY and permeability will be unity. Since the free space will contain no CHARGES in it, the conductivity will be zero.



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