ALTERNATING CURRENT AND VOLTAGE QUIZ

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

30 V

6 V

35 V

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 leads wave B by 105°.

Wave A leads wave B by 15°.

Wave A lags wave B by 15°.

Wave A lags wave B by 105°.

TRUE ANSWER : ?
YOUR ANSWER : ?

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

1/100 cycle

120 cycles

12 cycles

1,200 cycles

TRUE ANSWER : ?
YOUR ANSWER : ?

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

None of these

13 V

6.5 V

26 V

TRUE ANSWER : ?
YOUR ANSWER : ?

A sine wave with a period of 4 ms is changing at a faster rate than a sine wave with a period of

0.0045 s

2 ms

1.5 ms

3,000 s

TRUE ANSWER : ?
YOUR ANSWER : ?

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

5.44 V

7.07 V

54.4 V

8 V

TRUE ANSWER : ?
YOUR ANSWER : ?

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

50 kHz

500 kHz

5 kHz

33.33 kHz

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

4 V

18.8 V

2.66 V

26.6 V

TRUE ANSWER : ?
YOUR ANSWER : ?

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

400 rps

800 rps

200 rps

1,600 rps

TRUE ANSWER : ?
YOUR ANSWER : ?

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

10.60 V

5.93 V

16.54 V

1.65 V

TRUE ANSWER : ?
YOUR ANSWER : ?

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