Which of the following statements about an inductor that is connected to an AC voltage is true?
A)The average power dissipated by the inductor is zero.
B)At low frequencies the inductor behaves like a short circuit.
C)At high frequencies the inductor behaves like an open short circuit.
D)The back EMF produced by the inductor is the maximum when the voltage is at zero part of the cycle.
E)All the above statements are true.

Question

Quizplus · Accepted Answer

Option A is true because in an ideal inductor, there is no energy dissipation (no resistor); therefore, the average power dissipated is zero. Option B and C are false because an inductor is a frequency-dependent device that behaves like an open circuit at low frequencies and a short circuit at high frequencies. Option D is false because the back EMF produced by the inductor is maximum when the current is changing at the fastest rate, which occurs when the voltage is at the maximum or minimum part of the cycle.

Which of the Following Statements About an Inductor That Is