A coil with a self-inductance of 6.0 H has a constant current of 2.0 A flowing through it for 2.0 s. What is the emf induced in this coil?
A) 0.0 V
B) 6.0 V
C) 12 V
D) 4.0 V
E) 8.0 V

Question

Quizplus · Accepted Answer

The emf induced in a coil is given by the formula $emf = -L \frac{dI}{dt}$, where $L$ is the self-inductance and $\frac{dI}{dt}$ is the rate of change of current. Since the current is constant, $\frac{dI}{dt} = 0$, which means no emf is induced.

A Coil with a Self-Inductance of 6