Electrical Engineering - Alternating Current and Voltage

Exercise :: Alternating Current and Voltage - General Questions

21. 

A sine wave with a period of 4 ms is changing at a faster rate than a sine wave with a period of

A. 0.0045 s
B. 2 ms
C. 1.5 ms
D. 3,000 s

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

22. 

A waveform has a baseline of 3 V, a duty cycle of 20%, and an amplitude of 8 V. The average voltage value is

A. 4 V
B. 4.6 V
C. 1.6 V
D. 11 V

Answer: Option A

Explanation:

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23. 

A sine wave with an rms value of 12 V is riding on a dc level of 18 V. The maximum value of the resulting waveform is

A. 6 V
B. 30 V
C. 35 V
D. 0 V

Answer: Option C

Explanation:

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24. 

If the rms current through a 6.8 k resistor is 8 mA, the rms voltage drop across the resistor is

A. 5.44 V
B. 54.4 V
C. 7.07 V
D. 8 V

Answer: Option B

Explanation:

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25. 

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

A. 25.48 V
B. 6.37 V
C. 14.14 V
D. 50.96 V

Answer: Option A

Explanation:

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