ALTERNATING CURRENT AND VOLTAGE QUIZ

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

2.66 V

18.8 V

26.6 V

4 V

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YOUR ANSWER : ?

The conductive loop on the rotor of a simple two-pole, single-phase generator rotates at a rate of 400 rps. The frequency of the induced output voltage is

indeterminable

100 Hz

400 Hz

40 Hz

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If a sine wave goes through 10 cycles in 20 s, the period is

100 s

4 s

20 s

2 s

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A phasor represents

the width of a quantity

the magnitude and a quantity direction

the magnitude of a quantity

the phase angle

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A sine wave of 15 kHz is changing at a faster rate than a sine wave with a frequency of

18 kHz

25 kHz

1.3 MHz

12 kHz

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

54.4 V

8 V

5.44 V

7.07 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 mA

1.5 mA

10 mA

15 mA

TRUE ANSWER : ?
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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

5.93 V

1.65 V

10.60 V

16.54 V

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

25.48 V

50.96 V

14.14 V

6.37 V

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

50 Hz

10 Hz

100 Hz

1,000 Hz

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