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Electrical Engineering
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Alternating Current and Voltage
Comments
Question
How many degrees are there in Π/3 rad?
Options
A. 6°
B. 60°
C. 180°
D. 27°
Correct Answer
60°
Alternating Current and Voltage problems
Search Results
1. 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
Scratch Pad
Discuss
Correct Answer: 54.4 V
2. 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
Scratch Pad
Discuss
Correct Answer: 16.54 V
3. Find the node voltage
V
A
.
Options
A. 518 mV
B. 5.18 V
C. 9.56 V
D. 956 mV
Show Answer
Scratch Pad
Discuss
Correct Answer: 5.18 V
Explanation:
Reason: The voltage drop through R2 is 5.18v.
4. What is the voltage drop across
R
3
?
Options
A. 112 mV
B. 11.25 V
C. 180 mV
D. 1.80 V
Show Answer
Scratch Pad
Discuss
Correct Answer: 180 mV
5. What is the voltage drop across
R
2
?
Options
A. 3.5 V
B. 4.18 V
C. 1.5 V
D. 145 mV
Show Answer
Scratch Pad
Discuss
Correct Answer: 4.18 V
6. 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
7. 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
Show Answer
Scratch Pad
Discuss
Correct Answer: 100 Hz
8. 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
Show Answer
Scratch Pad
Discuss
Correct Answer: 1,200 cycles
9. 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
Scratch Pad
Discuss
Correct Answer: 26.6 V
10. 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
Scratch Pad
Discuss
Correct Answer: is 30%
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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