ALTERNATING CURRENT AND VOLTAGE QUIZ

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

None of these

0°

40°

45°

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

1.65 V

16.54 V

5.93 V

10.60 V

TRUE ANSWER : ?
YOUR ANSWER : ?

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

1,000 Hz

10 Hz

100 Hz

50 Hz

TRUE ANSWER : ?
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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

4.6 V

11 V

4 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

30 V

6 V

0 V

35 V

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

0.0045 s

3,000 s

2 ms

1.5 ms

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

6.37 V

25.48 V

14.14 V

50.96 V

TRUE ANSWER : ?
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If the rms voltage drop across a 15 k resistor is 16 V, the peak current through the resistor is

1.5 mA

10 mA

1 mA

15 mA

TRUE ANSWER : ?
YOUR ANSWER : ?

How many degrees are there in /3 rad?

6°

27°

60°

180°

TRUE ANSWER : ?
YOUR ANSWER : ?

A phasor represents

the magnitude and a quantity direction

the phase angle

the magnitude of a quantity

the width of a quantity

TRUE ANSWER : ?
YOUR ANSWER : ?

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