Question 317: AC fundamentals

Question

Average power associated with an ideal inductor and ideal capacitor over a complete cycle of a.c. is respectively

Accepted Answer

For an ideal inductor and an ideal capacitor, the average power over a complete cycle of alternating current (AC) is zero for both components.
Explanation
Inductor:
An ideal inductor has no resistance and therefore no real power loss. The energy is stored temporarily in the magnetic field during one part of the AC cycle and then completely returned to the circuit in another part of the cycle. Therefore, the net energy transfer over a full cycle is zero, resulting in:
Average Power for Inductor = 0
Capacitor:
Similarly, an ideal capacitor temporarily stores energy in its electric field. During one half of the AC cycle, energy is stored, and during the other half, it is returned to the circuit. Since the energy is not dissipated, the net energy transfer over a full cycle is zero:
Average Power for Capacitor = 0
Thus, the average power over a complete cycle for both an ideal inductor and ideal capacitor is:
Option C: zero, zero

Answer

zero, one

Answer

one, zero

Answer

zero, zero

Answer

one, one

AC fundamentals

Average power associated with an ideal inductor and ideal capacitor over a complete cycle of a.c. is respectively

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