ALTERNATING CURRENT AND VOLTAGE QUIZ

When a sine wave has a frequency of 100 Hz in 12 s it goes through

12 cycles

1,200 cycles

1/100 cycle

120 cycles

TRUE ANSWER : ?
YOUR ANSWER : ?

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

26.6 V

18.8 V

4 V

2.66 V

TRUE ANSWER : ?
YOUR ANSWER : ?

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

30 V

6 V

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A sawtooth wave has a period of 10 ms. Its frequency is

10 Hz

100 Hz

50 Hz

1,000 Hz

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

800 rps

200 rps

400 rps

1,600 rps

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YOUR ANSWER : ?

A square wave has a period of 60 s. The first odd harmonic is

5 kHz

33.33 kHz

500 kHz

50 kHz

TRUE ANSWER : ?
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The average value of a 12 V peak sine wave over one complete cycle is

1.27 V

6.37 V

7.64 V

0 V

TRUE ANSWER : ?
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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 leads wave B by 105°.

Wave A lags wave B by 15°.

Wave A lags wave B by 105°.

TRUE ANSWER : ?
YOUR ANSWER : ?

If the peak of a sine wave is 13 V, the peak-to-peak value is

13 V

None of these

6.5 V

26 V

TRUE ANSWER : ?
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A signal with a 400 s period has a frequency of

25,000 Hz

400 Hz

250 Hz

2,500 Hz

TRUE ANSWER : ?
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