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Electrical Engineering
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Alternating Current and Voltage
Comments
Question
If the peak of a sine wave is 13 V, the peak-to-peak value is
Options
A. 6.5 V
B. 13 V
C. 26 V
D. none of the above
Correct Answer
26 V
Alternating Current and Voltage problems
Search Results
1. The average value of a 12 V peak sine wave over one complete cycle is
Options
A. 0 V
B. 1.27 V
C. 7.64 V
D. 6.37 V
Show Answer
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Discuss
Correct Answer: 0 V
2. A signal with a 400 µs period has a frequency of
Options
A. 250 Hz
B. 2,500 Hz
C. 25,000 Hz
D. 400 Hz
Show Answer
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Discuss
Correct Answer: 2,500 Hz
3. If the rms voltage drop across a 15 kΩ resistor is 16 V, the peak current through the resistor is
Options
A. 15 mA
B. 1.5 mA
C. 10 mA
D. 1 mA
Show Answer
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Discuss
Correct Answer: 1.5 mA
4. A 20 kHz pulse waveform consists of pulses that are 15 µs wide. The duty cycle
Options
A. is 1%
B. is 30%
C. is 100%
D. cannot be determined
Show Answer
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Discuss
Correct Answer: is 30%
5. If the rms current through a 4.7 kΩ resistor is 4 mA, the peak voltage drop across the resistor is
Options
A. 4 V
B. 18.8 V
C. 26.6 V
D. 2.66 V
Show Answer
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Discuss
Correct Answer: 26.6 V
6. 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?
Options
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°.
Show Answer
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Correct Answer: Wave A leads wave B by 15°.
7. A phasor represents
Options
A. the magnitude and a quantity direction
B. the width of a quantity
C. the phase angle
D. the magnitude of a quantity
Show Answer
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Discuss
Correct Answer: the magnitude and a quantity direction
8. A pulse waveform has a high time of 8 ms and a pulse width of 32 ms. The duty cycle is
Options
A. 25%
B. 50%
C. 1%
D. 100%
Show Answer
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Discuss
Correct Answer: 25%
9. A sinusoidal current has an rms value of 14 mA. The peak-to-peak value is
Options
A. 45.12 mA
B. 16 mA
C. 39.6 mA
D. 22.6 mA
Show Answer
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Discuss
Correct Answer: 39.6 mA
10. The average half-cycle value of a sine wave with a 40 V peak is
Options
A. 25.48 V
B. 6.37 V
C. 14.14 V
D. 50.96 V
Show Answer
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Discuss
Correct Answer: 25.48 V
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More in Electrical Engineering:
Alternating Current and Voltage
Branch, Loop and Node Analyses
Capacitors
Circuit Theorems and Conversions
Circuit Theorems in AC Analysis
Energy and Power
Inductors
Magnetism and Electromagnetism
Ohm's Law
Parallel Circuits
Passive Filters
Quantities and Units
RC Circuits
RL Circuits
RLC Circuits and Resonance
Series Circuits
Series-Parallel Circuits
Three-Phase Systems in Power Applications
Time Response of Reactive Circuits
Transformers
Voltage, Current and Resistance