Electrical Engineering

Question: If a sine wave goes through 10 cycles in 20 s, the period is
[A].

20 s

[B].

4 s

[C].

2 s

[D].

100 s

Answer: Option C

Explanation:

No answer description available for this question.

Question: 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:

No answer description available for this question.

Question: A pulse waveform has a high time of 8 ms and a pulse width of 32 ms. The duty cycle is
[A].

25%

[B].

50%

[C].

1%

[D].

100%

Answer: Option A

Explanation:

No answer description available for this question.

Question: A 20 kHz pulse waveform consists of pulses that are 15 s wide. The duty cycle
[A].

is 1%

[B].

is 30%

[C].

is 100%

[D].

cannot be determined

Answer: Option B

Explanation:

No answer description available for this question.

Question: If the rms voltage drop across a 15 k resistor is 16 V, the peak current through the resistor is
[A].

15 mA

[B].

1.5 mA

[C].

10 mA

[D].

1 mA

Answer: Option B

Explanation:

No answer description available for this question.

Question: If the rms current through a 4.7 k resistor is 4 mA, the peak voltage drop across the resistor is
[A].

4 V

[B].

18.8 V

[C].

26.6 V

[D].

2.66 V

Answer: Option C

Explanation:

No answer description available for this question.

Question: 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.

Question: 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
[A].

0°

[B].

45°

[C].

40°

[D].

none of the above

Answer: Option C

Explanation:

No answer description available for this question.

Question: 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.

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