ALTERNATING CURRENT AND VOLTAGE QUIZ

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

100 s

4 s

2 s

20 s

TRUE ANSWER : ?
YOUR ANSWER : ?

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

1.5 mA

1 mA

10 mA

15 mA

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

5.93 V

16.54 V

1.65 V

10.60 V

TRUE ANSWER : ?
YOUR ANSWER : ?

A waveform has a baseline of 3 V, a duty cycle of 20%, and an amplitude of 8 V. The average voltage value is

4.6 V

4 V

1.6 V

11 V

TRUE ANSWER : ?
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

400 Hz

100 Hz

indeterminable

40 Hz

TRUE ANSWER : ?
YOUR ANSWER : ?

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

50 Hz

100 Hz

10 Hz

1,000 Hz

TRUE ANSWER : ?
YOUR ANSWER : ?

If the peak of a sine wave is 13 V, the peak-to-peak value is

6.5 V

26 V

None of these

13 V

TRUE ANSWER : ?
YOUR ANSWER : ?

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

is 100%

is 30%

is 1%

cannot be determined

TRUE ANSWER : ?
YOUR ANSWER : ?

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

14.14 V

50.96 V

6.37 V

25.48 V

TRUE ANSWER : ?
YOUR ANSWER : ?

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

400 rps

200 rps

1,600 rps

800 rps

TRUE ANSWER : ?
YOUR ANSWER : ?

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