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Discussion
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Electrical Engineering
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Energy and Power
See What Others Are Saying!
Question
A given power supply is capable of providing 6 A for 3.5 h. Its ampere-hour rating is
Options
A. 0.58 Ah
B. 2.1 Ah
C. 21 Ah
D. 58 Ah
Correct Answer
21 Ah
More questions
1. The quantity 3.3 × 10
3
is the same as
Options
A. 330
B. 3,300
C. 33,000
D. 0.0033
Show Answer
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Discuss
Correct Answer: 3,300
2. What is the magnetomotive force (mmf) of a wire with 8 turns carrying three amperes of current?
Options
A. 2,400 At
B. 240 At
C. 24 At
D. 2.4 At
Show Answer
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Discuss
Correct Answer: 24 At
3. A 120 Ω resistor must carry a maximum current of 25 mA. Its rating should be at least
Options
A. 4.8 W
B. 150 mW
C. 15 mW
D. 480 mW
Show Answer
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Discuss
Correct Answer: 150 mW
4. A complex number represents a phasor quantity.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: True
5. To increase the current in a series
RL
circuit, the frequency
Options
A. should be increased
B. should be decreased
C. should be constant
D. cannot be determined without values
Show Answer
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Discuss
Correct Answer: should be decreased
6. You cannot convert a voltage source to an equivalent current source, or vice versa.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: False
7. Power rating is related to resistance value.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: False
8. In an
RL
high-pass filter, the output is taken across the inductor and the output leads the input.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: True
9. A 15 V source is connected across a 12 Ω resistor. How much energy is used in three minutes?
Options
A. 938 Wh
B. 0.938 Wh
C. 56.25 Wh
D. 5.6 Wh
Show Answer
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Discuss
Correct Answer: 0.938 Wh
10. A given power supply is capable of providing 6 A for 3.5 h. Its ampere-hour rating is
Options
A. 0.58 Ah
B. 2.1 Ah
C. 21 Ah
D. 58 Ah
Show Answer
Scratch Pad
Discuss
Correct Answer: 21 Ah
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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
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