ALTERNATING CURRENT AND VOLTAGE QUIZ

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

20 s

4 s

100 s

2 s

TRUE ANSWER : ?
YOUR ANSWER : ?

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

120 cycles

1,200 cycles

1/100 cycle

12 cycles

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 : ?

One sine wave has a positive-going zero crossing at 15° and another sine wave has a positive-going zero crossing at 55°. The phase angle between the two waveforms is

0°

45°

40°

None of these

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

11 V

4 V

1.6 V

4.6 V

TRUE ANSWER : ?
YOUR ANSWER : ?

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

25 kHz

18 kHz

12 kHz

1.3 MHz

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

18.8 V

26.6 V

2.66 V

4 V

TRUE ANSWER : ?
YOUR ANSWER : ?

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

33.33 kHz

50 kHz

500 kHz

5 kHz

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

1%

50%

100%

25%

TRUE ANSWER : ?
YOUR ANSWER : ?

A signal with a 400 s period has a frequency of

2,500 Hz

400 Hz

250 Hz

25,000 Hz

TRUE ANSWER : ?
YOUR ANSWER : ?

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