Question

Among the following, which is the right formula for growth in an inductive circuit?

(a) VL=V(1-e^-tR/L)

(b) VL=(e^-tR/L)

(c) VL=(1-e^-tR/L)

(d) VL=V(e^-tR/L)

I got this question in exam.

This interesting question is from Growth in an Inductive Circuit topic in portion Inductance in a DC Circuit of Basic Electrical Engineering

Answer 1

Correct answer is (d) VL=V(e^-tR/L)

The best explanation: The correct formula for growth in an inductive circuit is VL=V(e^-tR/L). As the time increases, voltage decreases.