Electrical Engineering - Alternating Current and Voltage

Exercise :: Alternating Current and Voltage - General Questions

11. 

A signal with a 400 s period has a frequency of

A. 250 Hz
B. 2,500 Hz
C. 25,000 Hz
D. 400 Hz

Answer: Option B

Explanation:

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12. 

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

A. 25 kHz
B. 12 kHz
C. 18 kHz
D. 1.3 MHz

Answer: Option B

Explanation:

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13. 

The average value of a 12 V peak sine wave over one complete cycle is

A. 0 V
B. 1.27 V
C. 7.64 V
D. 6.37 V

Answer: Option A

Explanation:

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14. 

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

A. 1/100 cycle
B. 12 cycles
C. 120 cycles
D. 1,200 cycles

Answer: Option D

Explanation:

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15. 

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

A. 10 Hz
B. 50 Hz
C. 100 Hz
D. 1,000 Hz

Answer: Option C

Explanation:

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