1.

The susceptibility of free space is(a) 1(b) 0(c) 2(d) ∞I got this question during an interview.Question is taken from Electrostatic Properties in division Electrostatic Fields of Electromagnetic Theory

Answer»

The correct option is (b) 0

Easiest explanation: For FREE space/air, the relative permittivity is UNITY i.e, εr = 1. Thus χe = εr – 1 = 0. The SUSCEPTIBILITY will become ZERO in air.



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