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Discussion
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Electrical Engineering
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Voltage, Current and Resistance
See What Others Are Saying!
Question
If there is 6 A of current through the filament of a lamp, how many coulombs of charge move through the filament in 1.75 s?
Options
A. 10.5 C
B. 105 C
C. 3.4 C
D. 34 C
Correct Answer
10.5 C
More questions
1. What is the approximate resistance setting of a rheostat in which 650 mA of current flows with a 150 V source?
Options
A. 9.7 Ω
B. 97 Ω
C. 23 Ω
D. 230 Ω
Show Answer
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Discuss
Correct Answer: 230 Ω
2. An 18 V source has an internal resistance of 70 Ω. If a load resistance of 33 Ω is connected to the voltage source, the load power,
P
L
, is
Options
A. 0 W
B. 1 W
C. 175 mW
D. 18 mW
Show Answer
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Discuss
Correct Answer: 1 W
3. In a series resonant band-pass filter, a lower value of
Q
results in
Options
A. a higher resonant frequency
B. a smaller bandwidth
C. a higher impedance
D. a larger bandwidth
Show Answer
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Correct Answer: a larger bandwidth
4. At the end of a 14 day period, your utility bill shows that you have used 18 kWh. What is your average daily power?
Options
A. 1.286 kWh
B. 12.85 kWh
C. 535 kWh
D. 252 kWh
Show Answer
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Correct Answer: 1.286 kWh
5. When the north poles of two bar magnets are brought close together, there will be
Options
A. no force
B. a downward force
C. a force of attraction
D. a force of repulsion
Show Answer
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Discuss
Correct Answer: a force of repulsion
6. When assigning branch currents, you need not be concerned with the direction you choose.
Options
A. True
B. False
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Discuss
Correct Answer: True
7. An 18 V power supply is connected across a coil with a winding resistance of 180 Ω. Current flow in the coil is
Options
A. 1 mA
B. 10 mA
C. 100 mA
D. 1 A
Show Answer
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Discuss
Correct Answer: 100 mA
8. An uncharged capacitor and a 1 kΩ resistor are connected in series with a switch and a 6 V battery. At the instant the switch is closed, the voltage across the capacitor is
Options
A. 6 V
B. 3 V
C. 2 V
D. 0 V
Show Answer
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Correct Answer: 0 V
9. When the resistor voltage in a series
RL
circuit becomes less than the inductor voltage, the phase angle
Options
A. increases
B. decreases
C. is not affected
D. cannot be determined
Show Answer
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Correct Answer: increases
10. A 10 µF, 20 µF, 22 µF, and 100 µF capacitor are in parallel. The total capacitance is
Options
A. 2.43 µF
B. 4.86 µF
C. 100 µF
D. 152 µF
Show Answer
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Discuss
Correct Answer: 152 µF
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Alternating Current and Voltage
Branch, Loop and Node Analyses
Capacitors
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