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Electrical Engineering
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Alternating Current and Voltage
Comments
Question
A sawtooth wave has a period of 10 ms. Its frequency is
Options
A. 10 Hz
B. 50 Hz
C. 100 Hz
D. 1,000 Hz
Correct Answer
100 Hz
Alternating Current and Voltage problems
Search Results
1. A waveform has a baseline of 3 V, a duty cycle of 20%, and an amplitude of 8 V. The average voltage value is
Options
A. 4 V
B. 4.6 V
C. 1.6 V
D. 11 V
Show Answer
Scratch Pad
Discuss
Correct Answer: 4 V
2. How many degrees are there in Π/3 rad?
Options
A. 6°
B. 60°
C. 180°
D. 27°
Show Answer
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Discuss
Correct Answer: 60°
3. If the rms current through a 6.8 kΩ resistor is 8 mA, the rms voltage drop across the resistor is
Options
A. 5.44 V
B. 54.4 V
C. 7.07 V
D. 8 V
Show Answer
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Discuss
Correct Answer: 54.4 V
4. Two series resistors are connected to an ac source. If there are 7.5 V rms across one resistor and 4.2 V rms across the other, the peak source voltage is
Options
A. 16.54 V
B. 1.65 V
C. 10.60 V
D. 5.93 V
Show Answer
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Discuss
Correct Answer: 16.54 V
5. Find the node voltage
V
A
.
Options
A. 518 mV
B. 5.18 V
C. 9.56 V
D. 956 mV
Show Answer
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Discuss
Correct Answer: 5.18 V
Explanation:
Reason: The voltage drop through R2 is 5.18v.
6. When a sine wave has a frequency of 100 Hz in 12 s it goes through
Options
A. 1/100 cycle
B. 12 cycles
C. 120 cycles
D. 1,200 cycles
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Correct Answer: 1,200 cycles
7. 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
8. 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%
9. 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
10. 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
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Alternating Current and Voltage
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Circuit Theorems and Conversions
Circuit Theorems in AC Analysis
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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