ALTERNATING CURRENT AND VOLTAGE QUIZ

The average half-cycle value of a sine wave with a 40 V peak is

25.48 V

50.96 V

6.37 V

14.14 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

6 V

0 V

35 V

30 V

TRUE ANSWER : ?
YOUR ANSWER : ?

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

4 V

11 V

1.6 V

4.6 V

TRUE ANSWER : ?
YOUR ANSWER : ?

One sine wave has a positive-going zero crossing at 15° and another sine wave has a positive-going zero crossing at 55°. The phase angle between the two waveforms is

45°

40°

None of these

0°

TRUE ANSWER : ?
YOUR ANSWER : ?

A 20 kHz pulse waveform consists of pulses that are 15 s wide. The duty cycle

is 1%

is 30%

is 100%

cannot be determined

TRUE ANSWER : ?
YOUR ANSWER : ?

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 15°.

Wave A lags wave B by 105°.

Wave A leads wave B by 15°.

Wave A leads wave B by 105°.

TRUE ANSWER : ?
YOUR ANSWER : ?

A signal with a 400 s period has a frequency of

25,000 Hz

2,500 Hz

250 Hz

400 Hz

TRUE ANSWER : ?
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A sine wave with a period of 4 ms is changing at a faster rate than a sine wave with a period of

2 ms

1.5 ms

0.0045 s

3,000 s

TRUE ANSWER : ?
YOUR ANSWER : ?

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

7.64 V

6.37 V

0 V

1.27 V

TRUE ANSWER : ?
YOUR ANSWER : ?

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

50 kHz

33.33 kHz

500 kHz

5 kHz

TRUE ANSWER : ?
YOUR ANSWER : ?

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