ALTERNATING CURRENT AND VOLTAGE QUIZ

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

8 V

54.4 V

TRUE ANSWER : ?
YOUR ANSWER : ?

A sinusoidal current has an rms value of 14 mA. The peak-to-peak value is

45.12 mA

22.6 mA

39.6 mA

16 mA

TRUE ANSWER : ?
YOUR ANSWER : ?

A phasor represents

the magnitude of a quantity

the width of a quantity

the magnitude and a quantity direction

the phase angle

TRUE ANSWER : ?
YOUR ANSWER : ?

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

1,000 Hz

50 Hz

100 Hz

10 Hz

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

2 ms

1.5 ms

0.0045 s

3,000 s

TRUE ANSWER : ?
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A sine wave of 15 kHz is changing at a faster rate than a sine wave with a frequency of

1.3 MHz

25 kHz

12 kHz

18 kHz

TRUE ANSWER : ?
YOUR ANSWER : ?

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

TRUE ANSWER : ?
YOUR ANSWER : ?

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

800 rps

200 rps

400 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

16.54 V

1.65 V

10.60 V

5.93 V

TRUE ANSWER : ?
YOUR ANSWER : ?

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

cannot be determined

is 100%

is 1%

is 30%

TRUE ANSWER : ?
YOUR ANSWER : ?

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