ALTERNATING CURRENT AND VOLTAGE QUIZ

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

5.93 V

1.65 V

16.54 V

10.60 V

TRUE ANSWER : ?
YOUR ANSWER : ?

The average value of a 12 V peak sine wave over one complete cycle is

0 V

7.64 V

1.27 V

6.37 V

TRUE ANSWER : ?
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When a sine wave has a frequency of 100 Hz in 12 s it goes through

1/100 cycle

12 cycles

1,200 cycles

120 cycles

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If the rms current through a 6.8 k resistor is 8 mA, the rms voltage drop across the resistor is

54.4 V

5.44 V

8 V

7.07 V

TRUE ANSWER : ?
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A sine wave with an rms value of 12 V is riding on a dc level of 18 V. The maximum value of the resulting waveform is

0 V

35 V

6 V

30 V

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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 leads wave B by 15°.

Wave A lags wave B by 15°.

Wave A leads wave B by 105°.

Wave A lags wave B by 105°.

TRUE ANSWER : ?
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If the peak of a sine wave is 13 V, the peak-to-peak value is

6.5 V

13 V

26 V

None of these

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A waveform has a baseline of 3 V, a duty cycle of 20%, and an amplitude of 8 V. The average voltage value is

1.6 V

4 V

11 V

4.6 V

TRUE ANSWER : ?
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To produce an 800 Hz sine wave, a four-pole generator must be operated at

800 rps

1,600 rps

400 rps

200 rps

TRUE ANSWER : ?
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The average half-cycle value of a sine wave with a 40 V peak is

50.96 V

14.14 V

25.48 V

6.37 V

TRUE ANSWER : ?
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