When the frequency of an ac circuit is increased at constant voltage, the current increases and then decreases. Which combination of elements is most likely to comprise this circuit?
A)resistors only
B)inductors only
C)capacitors only
D)a combination of inductors and resistors
E)a combination of inductors and capacitors

Question

Quizplus · Accepted Answer

When the frequency of an AC circuit is increased, the reactance of a capacitor decreases while the reactance of an inductor increases. Therefore, in a circuit with both capacitors and inductors, there will be a frequency at which the capacitive reactance equals the inductive reactance, causing the current to be at a maximum. As the frequency increases further, the inductive reactance dominates, reducing the current. This phenomenon is commonly observed in resonant circuits, such as those used in radio tuning circuits.

When the Frequency of an Ac Circuit Is Increased at Constant