Question

The voltage of a capacitor 12F with a rating of 2J energy is

(a) 0.57

(b) 5.7

(c) 57

(d) 570

I have been asked this question by my college professor while I was bunking the class.

My doubt stems from Stokes Theorem topic in section Vector Calculus of Electromagnetic Theory

Answer 1

The correct option is (a) 0.57

The explanation: We can compute the energy stored in a capacitor from Stoke’s theorem as 0.5Cv^2. Thus given energy is 0.5 X 12 X v^2. We get v = 0.57 volts.