If an inductor, resistor and switch are connected in series to a 12 V battery,W hat is the magnitude of the inductorʹs voltage at the instant that the switch is closed?
A)6V
B)4V
C)0V
D)12V

Question

Quizplus · Accepted Answer

At the instant the switch is closed, the inductor opposes changes in current through it by generating a voltage across itself. This voltage initially equals the applied voltage (12 V) to prevent any sudden change in current, as per Lenz's Law.

If an Inductor, Resistor and Switch Are Connected in Series