Alternating Current and Voltage - General Questions

Directions to Solve

Alternating Current and Voltage - General Questions

1.

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:

No answer description available for this question.

2.

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:

No answer description available for this question.

3.

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:

No answer description available for this question.

4.

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:

No answer description available for this question.

5.

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 μs

Answer: Option A

Explanation:

No answer description available for this question.

6.

A phasor represents

A.	the magnitude and a quantity direction
B.	the width of a quantity
C.	the phase angle
D.	the magnitude of a quantity

Answer: Option A

Explanation:

No answer description available for this question.

7.

Sine wave A has a positive-going zero crossing at 45°. Sine wave B has a positive-going zero crossing at 60°. Which of the following statements is true?

A.	Wave A leads wave B by 15°.
B.	Wave A lags wave B by 15°.
C.	Wave A leads wave B by 105°.
D.	Wave A lags wave B by 105°.

Answer: Option A

Explanation:

No answer description available for this question.

8.

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

A.	5 kHz
B.	50 kHz
C.	500 kHz
D.	33.33 kHz

Answer: Option B

Explanation:

No answer description available for this question.

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