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Multiple Choice
The voltage across a resistor is found to be given by v R (t) = (10 V) cos[(120 s−1)t]:
a) At what frequency does the AC course operate?
b) If the resistance is 12 Ω, what is the maximum current in this circuit?
c) What is the RMS voltage of the AC source?
A
a) 19.1 Hz;
b) 0.83 A;
c) 7.1 V
b) 0.83 A;
c) 7.1 V
B
a) 120 V;
b) 1.2 A;
c) 2.2 V
b) 1.2 A;
c) 2.2 V
C
a) 754 Hz;
b) 120 A;
c) 14 V
b) 120 A;
c) 14 V
3:12m
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