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That AC voltage swings from peak to peak and back each second a number of times equal to:
A50
B40
C30
D60
Answer & Solution
Correct answer: D. 60
1. The mains supply alternates at a fixed frequency.
2. In the United States that frequency is standard.
3. It completes 60 cycles each second.
_Source: OpenStax College Physics 2e, Chapter 20, Electric Current, Resistance, and Ohm's Law._
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