Consider figures 25-21 and 25-22 on page 664 of the textbook. If fig. 25-21 is s

Question

Consider figures 25-21 and 25-22 on page 664 of the textbook. If fig. 25-21 is showing 60 Hz AC voltage in its lower panel, and fig. 25-22 is showing the power dissipated in a resistor in a 60 Hz AC circuit, what is the frequency of the power variation? Put another way, if the time between consecutive peaks in the voltage graph is 1/60 s; what is the time between consecutive peaks in the power graph? From a direct measurement personally made, I can assure that the time between consecutive peaks in the power graph is not 1/60 s.

Explanation / Answer

the time between consecutive peaks in the power graph = (1/60) * (1/2)

                                                                                         = 8.33 * 10-3 sec

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