CONTROL SYSTEMS QUIZ

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

45°

40°

0°

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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

4 s

20 s

2 s

100 s

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

4 V

2.66 V

26.6 V

TRUE ANSWER : ?
YOUR ANSWER : ?

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

6.5 V

13 V

None of these

26 V

TRUE ANSWER : ?
YOUR ANSWER : ?

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

6.37 V

14.14 V

50.96 V

25.48 V

TRUE ANSWER : ?
YOUR ANSWER : ?

A phasor represents

the magnitude of a quantity

the magnitude and a quantity direction

the phase angle

the width of a quantity

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

cannot be determined

is 100%

is 1%

is 30%

TRUE ANSWER : ?
YOUR ANSWER : ?

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

10 Hz

50 Hz

1,000 Hz

100 Hz

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

1%

25%

50%

100%

TRUE ANSWER : ?
YOUR ANSWER : ?

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

33.33 kHz

500 kHz

50 kHz

5 kHz

TRUE ANSWER : ?
YOUR ANSWER : ?

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