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The polarity of the voltage in a circuit operating at 60 Hz reverses: a) 120 times...

The polarity of the voltage in a circuit operating at 60 Hz reverses:

a) 120 times per second;

b) 90 times per second;

c) 60 times per second;

d) 30 times per second;

e) 10(pi) times per second

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Answer #1

a) 120 times per second;

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Answer #2

c) 60 times per second;

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