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Electrical Engineering
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Circuit Theorems in AC Analysis
See What Others Are Saying!
Question
Determine
V
TH
if
R
1
is changed to 3.3 kΩ.
Options
A. 0.574∠16.7° V
B. 4.63∠16.7° V
C. 4.63∠39.5° V
D. 0.463∠39.5° V
Correct Answer
4.63∠39.5° V
More questions
1. Norton's theorem gives
Options
A. an equivalent current source in parallel with an equivalent impedance
B. an equivalent current source in series with an equivalent impedance
C. an equivalent voltage source in parallel with an equivalent impedance
D. an equivalent voltage source in series with an equivalent impedance
Show Answer
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Discuss
Correct Answer: an equivalent current source in parallel with an equivalent impedance
2. The total resistance of a series circuit is equal to the difference between the largest and smallest value resistors.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: False
3. A constant load power means a uniform conversion of
Options
A. mechanical to electrical energy
B. electrical to mechanical energy
C. current to voltage
D. voltage to current
Show Answer
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Discuss
Correct Answer: electrical to mechanical energy
4. The formula to find
I
when the values of
V
and
R
are known is
Options
A.
I = VR
B.
I = R/V
C.
V = IR
D.
I = V/R
Show Answer
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Discuss
Correct Answer:
I = V/R
5. If the
RC
time constant of an integrator is increased, as the time constant is increased
Options
A. the capacitor charges more during a pulse and discharges less between pulses
B. the capacitor charges less during a pulse and discharges more between pulses
C. the capacitor charges more during a pulse and discharges more between pulses
D. the capacitor charges less during a pulse and discharges less between pulses
Show Answer
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Discuss
Correct Answer: the capacitor charges less during a pulse and discharges less between pulses
6. The internal resistance of a 20,000 ohm/volt voltmeter set on its 5 V range is
Options
A. 20,000 Ω
B. 100,000 Ω
C. 200,000 Ω
D. 1,000,000 Ω
Show Answer
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Discuss
Correct Answer: 100,000 Ω
7. Three lights are connected in parallel across a 120 volt source. If one light burns out,
Options
A. the remaining two will glow dimmer
B. the remaining two will glow brighter
C. the remaining two will not light
D. the remaining two will glow with the same brightness as before
Show Answer
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Discuss
Correct Answer: the remaining two will glow with the same brightness as before
8. At series resonance, the inductive reactance and capacitive reactance are never equal.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: False
9. Referring to Problem 5, how long will it take the capacitor to discharge if the internal resistance of the pulse source is 100 Ω?
Options
A. 300 µs
B. 600 µs
C. 900 µs
D. 1.5 ms
Show Answer
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Discuss
Correct Answer: 1.5 ms
10. When the frequency of the voltage applied to a series
RL
circuit is increased, the phase angle
Options
A. decreases
B. increases
C. does not change
D. cannot be determined without values
Show Answer
Scratch Pad
Discuss
Correct Answer: increases
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Circuit Theorems and Conversions
Circuit Theorems in AC Analysis
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Inductors
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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