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Air has a dielectric constant of ___________

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Air has a dielectric constant of ___________

(a) Unity

(b) Zero

(c) Infinity

(d) Hundred

This question was addressed to me during an internship interview.

This key question is from Capacitance in section Capacitance and Capacitors of Basic Electrical Engineering

1 Answer

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Correct answer is (a) Unity

Best explanation: Dielectric constant of air is the same as that of a vacuum which is equal to unity. Dielctric constant of air is taken as the reference to measure the dielectric constant of all other materials.

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