Question

Calculate the value of stored energy in an inductor if the value of inductance is 20H and 4A of current flows through it.

(a) 220J

(b) 150J

(c) 190J

(d) 160J

I had been asked this question in an online quiz.

This question is from Energy Stored in an Inductor in section Inductance in a DC Circuit of Basic Electrical Engineering

Answer 1

The correct choice is (d) 160J

For explanation I would say: The expression for energy in an inductor is

E = LI^2/2. Substituting the values from the given question, we get E = 160J.