ALTERNATING CURRENT AND VOLTAGE QUIZ

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

50%

100%

1%

25%

TRUE ANSWER : ?
YOUR ANSWER : ?

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

500 kHz

33.33 kHz

5 kHz

50 kHz

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

10.60 V

5.93 V

16.54 V

1.65 V

TRUE ANSWER : ?
YOUR ANSWER : ?

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

15 mA

1.5 mA

10 mA

1 mA

TRUE ANSWER : ?
YOUR ANSWER : ?

A phasor represents

the magnitude and a quantity direction

the magnitude of a quantity

the width of a quantity

the phase angle

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

40°

45°

0°

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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

None of these

26 V

6.5 V

13 V

TRUE ANSWER : ?
YOUR ANSWER : ?

A signal with a 400 s period has a frequency of

25,000 Hz

250 Hz

2,500 Hz

400 Hz

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

1.6 V

11 V

4 V

4.6 V

TRUE ANSWER : ?
YOUR ANSWER : ?

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

100 s

20 s

2 s

4 s

TRUE ANSWER : ?
YOUR ANSWER : ?

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