ALTERNATING CURRENT AND VOLTAGE QUIZ

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

10 mA

15 mA

1 mA

1.5 mA

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

3,000 s

0.0045 s

1.5 ms

2 ms

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

20 s

100 s

2 s

4 s

TRUE ANSWER : ?
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A sawtooth wave has a period of 10 ms. Its frequency is

1,000 Hz

100 Hz

50 Hz

10 Hz

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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 lags wave B by 15°.

Wave A leads wave B by 105°.

Wave A leads wave B by 15°.

Wave A lags wave B by 105°.

TRUE ANSWER : ?
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A phasor represents

the width of a quantity

the magnitude of a quantity

the magnitude and a quantity direction

the phase angle

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

is 100%

is 1%

cannot be determined

is 30%

TRUE ANSWER : ?
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When a sine wave has a frequency of 100 Hz in 12 s it goes through

1/100 cycle

12 cycles

120 cycles

1,200 cycles

TRUE ANSWER : ?
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A signal with a 400 s period has a frequency of

25,000 Hz

250 Hz

2,500 Hz

400 Hz

TRUE ANSWER : ?
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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

40 Hz

400 Hz

100 Hz

indeterminable

TRUE ANSWER : ?
YOUR ANSWER : ?

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