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 : ?

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

1,200 cycles

120 cycles

12 cycles

1/100 cycle

TRUE ANSWER : ?
YOUR ANSWER : ?

A square wave has a period of 60 s. The first odd harmonic is

33.33 kHz

50 kHz

5 kHz

500 kHz

TRUE ANSWER : ?
YOUR ANSWER : ?

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 : ?
YOUR ANSWER : ?

The average value of a 12 V peak sine wave over one complete cycle is

0 V

1.27 V

6.37 V

7.64 V

TRUE ANSWER : ?
YOUR ANSWER : ?

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

100 Hz

10 Hz

1,000 Hz

50 Hz

TRUE ANSWER : ?
YOUR ANSWER : ?

A pulse waveform has a high time of 8 ms and a pulse width of 32 ms. The duty cycle is

25%

1%

100%

50%

TRUE ANSWER : ?
YOUR ANSWER : ?

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 105°.

Wave A leads wave B by 105°.

Wave A leads wave B by 15°.

Wave A lags wave B by 15°.

TRUE ANSWER : ?
YOUR ANSWER : ?

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

12 kHz

25 kHz

1.3 MHz

18 kHz

TRUE ANSWER : ?
YOUR ANSWER : ?

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

800 rps

200 rps

1,600 rps

400 rps

TRUE ANSWER : ?
YOUR ANSWER : ?

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