Alternating Current and Voltage - General Questions

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Alternating Current and Voltage - General Questions

1. 

What is the average voltage when a rectangular wave's base line voltage is 20 V, its peak-to-peak voltage is 50 V, and its duty cycle is 20%?
A. 26 V
B. 30 V
C. 40 V
D. 45 V

Answer: Option B

Explanation:

No answer description available for this question.

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2. 

A single-phase induction motor
A. is self-starting
B. operates at a fixed speed
C. is less reliable than a three-phase synchronous motor
D. none of the above

Answer: Option D

Explanation:

No answer description available for this question

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3. 

mcq8_1001_1 (1)

Which point is the trailing edge of the repetitive pulse waveform in the given circuit?

 
A. Point A
B. Point B
C. Point C
D. Point D

Answer: Option A

Explanation:

No answer description available for this question

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4. 

mcq8_1008_1

What is the peak voltage across R3 in the given circuit?

 
A. 1.2 V
B. 5 V
C. 7 V
D. 12 V

Answer: Option B

Explanation:

No answer description available for this question

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5. 

What is the fourth harmonic of a fundamental frequency of 400 Hz?
A. 100 Hz
B. 4 kHz
C. 4 Hz
D. 1.6 kHz

Answer: Option C

Explanation:

No answer description available for this question.

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6. 

mcq8_1006_1 (1)

What is the dc voltage of the waveform in the given circuit?

 
A. 2 V
B. 4 V
C. 6 V
D. 8 V

Answer: Option C

Explanation:

No answer description available for this question

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7. 

The effective value of a sine wave is equal to
A. 0.707 of peak voltage
B. 0.636 of peak voltage
C. sin 45° of peak voltage
D. both 0.707 of peak voltage and sin 45° of peak voltage

Answer: Option D

Explanation:

No answer description available for this question.

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8. 

mcq8_1001_1

Calculate the duty cycle of the repetitive pulse waveform in the given circuit. 

 
A. 8.33%
B. 0%
C. 33.33%
D. 25%

Answer: Option D

Explanation:

No answer description available for this question

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