A resistor and an inductor are connected in series to an ideal battery of constant terminal voltage.At the moment contact is made with the battery,the voltage across the inductor is
A)greater than the battery's terminal voltage.
B)equal to the battery's terminal voltage.
C)less than the battery's terminal voltage,but not zero.
D)zero.
E)equal to the voltage across the resistor.

Question

Quizplus · Accepted Answer

When a resistor and an inductor are connected in series to a battery, at the moment contact is made, the inductor opposes changes in current through it by generating a back EMF (electromotive force) equal to the battery's terminal voltage, according to Lenz's Law. This means the initial voltage across the inductor is equal to the battery's terminal voltage.

A Resistor and an Inductor Are Connected in Series to an Ideal