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Alternating Current and Voltage

Alternating Current and Voltage
If the peak of a sine wave is 13 V, the peak-to-peak value is

13 V
6.5 V
None of these
26 V

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Alternating Current and Voltage
A phasor represents

the phase angle
the magnitude and a quantity direction
the width of a quantity
the magnitude of a quantity

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Alternating Current and Voltage
Two series resistors are connected to an ac source. If there are 7.5 V rms across one resistor and 4.2 V rms across the other, the peak source voltage is

1.65 V
10.60 V
5.93 V
16.54 V

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Alternating Current and Voltage
Sine wave A has a positive-going zero crossing at 45°. Sine wave B has a positive-going zero crossing at 60°. Which of the following statements is true?

Wave A lags wave B by 105°.
Wave A lags wave B by 15°.
Wave A leads wave B by 15°.
Wave A leads wave B by 105°.

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Alternating Current and Voltage
If the rms current through a 4.7 k resistor is 4 mA, the peak voltage drop across the resistor is

18.8 V
2.66 V
4 V
26.6 V

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Alternating Current and Voltage
How many degrees are there in /3 rad?

27°
6°
180°
60°

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