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Electrical Engineering
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Series-Parallel Circuits
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Question
Two 1.2 kΩ resistors are in series and this series combination is in parallel with a 3.3 kΩ resistor. The total resistance is
Options
A. 138 Ω
B. 1,389 Ω
C. 5,700 Ω
D. 880 Ω
Correct Answer
1,389 Ω
More questions
1. Three 15 mH inductors are in series. The total inductance is
Options
A. 15 mH
B. 30 mH
C. 45 mH
D. 5 mH
Show Answer
Scratch Pad
Discuss
Correct Answer: 45 mH
2. A parallel circuit acts as a current divider.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: True
3. A capacitor blocks ac but passes dc.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
4. Current is measured in
Options
A. watts
B. volts
C. henries
D. amperes
Show Answer
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Discuss
Correct Answer: amperes
5. The number of kilowatts in 135 milliwatts is
Options
A. 1.35 × 10
?4
kW
B. 135 × 10
?3
kW
C. 0.0135 kW
D. 0.00135 kW
Show Answer
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Discuss
Correct Answer: 1.35 × 10
?4
kW
6. When the current through a 12 kΩ resistor is 8 mA, the power is
Options
A. 7.68 mW
B. 768 mW
C. 7.68 W
D. 76.8 W
Show Answer
Scratch Pad
Discuss
Correct Answer: 768 mW
7. In an
RL
circuit, part of the power is resistive and part is reactive.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
8. The inductance of an iron-core coil decreases if
Options
A. the number of turns is decreased
B. the iron core is removed
C. the length of the coil decreases
D. none of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: the number of turns is decreased
9. A transformer with a 110 V primary has a 15:1 turns ratio. The load resistance,
R
L
, is 120 Ω. What is the approximate voltage across the load?
Options
A. 7.3 V
B. 73 V
C. 88 V
D. 880 V
Show Answer
Scratch Pad
Discuss
Correct Answer: 7.3 V
10. A 220 Ω resistor is in series with a 2.2 µF capacitor. The time constant is
Options
A. 48 µs
B. 480 µs
C. 2.42 µs
D. 24 µs
Show Answer
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Discuss
Correct Answer: 480 µs
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Quantities and Units
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RLC Circuits and Resonance
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Series-Parallel Circuits
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Time Response of Reactive Circuits
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