Question

What is the value of dielectric constant of free space?

(a) 8.854 * 10^-9 F m^-1

(b) 8.854 * 10^-12 F ^-1

(c) 8.854 * 10^-15 F ^-1

(d) 8.854 * 10^-6 F ^-1

The question was posed to me in quiz.

Origin of the question is Polarisation and Dielectrics in chapter Refractories & Dielectric Materials of Engineering Material & Metallurgy

Answer 1

Right answer is (b) 8.854 * 10^-12 F ^-1

Easiest explanation: The dielectric constant is that value which designates the capacity of a material to store electrical energy. It is denoted by  and has a value of 8.854 * 10^-12 F m-1. Dielectric constant is denoted as Farad per meter.