In three-phase power systems, the delivered power _____.
A) falls to zero three times per cycle
B) falls to zero once per cycle
C) never falls to zero
D) falls to zero at least three times per cycle

Question

Quizplus · Accepted Answer

In a three-phase power system, the power delivered to the load is constant and does not fall to zero because the sum of the instantaneous powers in the three phases is a constant value. This is one of the key advantages of three-phase systems over single-phase systems, where power does fall to zero twice per cycle.

In Three-Phase Power Systems, the Delivered Power _____