Question

What is the relative permittivity when the actual permittivity is 4F/m?

(a) 4.57*10^-11

(b) 4.57*10^12

(c) 4.57*10^11

(d) 4.57*10^-12

This question was posed to me in an international level competition.

This intriguing question comes from Relative Permittivity in division Capacitance and Capacitors of Basic Electrical Engineering

Answer 1

Right choice is (c) 4.57*10^11

The explanation: Relative permittivity= Actual permittivity/ Absolute permittivity.

Relative permittivity = 4/(8.85*10^-12) = 4.57*10^11.