Question

The energy stored in an inductor 2H and current 4A is

(a) 4

(b) 8

(c) 12

(d) 16

This question was addressed to me by my school teacher while I was bunking the class.

I need to ask this question from Stokes Theorem in section Vector Calculus of Electromagnetic Theory

Answer 1

The correct choice is (d) 16

To explain: From Stoke’s theorem, we can calculate energy stored in an inductor as 0.5Li^2. E = 0.5 X 2 X 4^2 = 16 units.