ALTERNATING CURRENT AND VOLTAGE QUIZ

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

120 cycles

1,200 cycles

12 cycles

1/100 cycle

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

26.6 V

2.66 V

18.8 V

4 V

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

18 kHz

12 kHz

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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

15 mA

10 mA

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A phasor represents

the magnitude and a quantity direction

the width of a quantity

the phase angle

the magnitude of a quantity

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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

5.44 V

8 V

7.07 V

TRUE ANSWER : ?
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How many degrees are there in /3 rad?

60°

6°

27°

180°

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A signal with a 400 s period has a frequency of

250 Hz

25,000 Hz

2,500 Hz

400 Hz

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

100 Hz

10 Hz

50 Hz

1,000 Hz

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

14.14 V

50.96 V

25.48 V

6.37 V

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