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Electrical Engineering
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Energy and Power
See What Others Are Saying!
Question
In 40 kW, there are
Options
A. 0.4 mW
B. 40,000 W
C. 400 W
D. 5,000 W
Correct Answer
40,000 W
More questions
1. If a load is purely inductive and the reactive power is 12 VAR, the apparent power is
Options
A. 0 VA
B. 12 VA
C. 6 VA
D. 24 VA
Show Answer
Scratch Pad
Discuss
Correct Answer: 12 VA
2. When these numbers are multiplied, (6 × 10
3
) (5 × 10
5
), the result is
Options
A. 3 × 10
8
B. 30 × 10
8
C. 300 × 10
9
D. 3,000 × 10
7
Show Answer
Scratch Pad
Discuss
Correct Answer: 30 × 10
8
3. Referring to Problem 21, the filter's bandwidth is
Options
A. 11.5 Hz
B. 530 Hz
C. 53 Hz
D. 106 Hz
Show Answer
Scratch Pad
Discuss
Correct Answer: 53 Hz
4. If you used 400 W of power for 30 h, you have used
Options
A. 1.3 kWh
B. 13.3 kWh
C. 1.2 kWh
D. 12 kWh
Show Answer
Scratch Pad
Discuss
Correct Answer: 12 kWh
5. A dc component is the peak value of a pulse waveform.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: False
6. A 120 Ω load is connected across an ideal voltage source with
V
S
= 12 V. The voltage across the load
Options
A. is 0 V
B. is 12 V
C. is 120 V
D. cannot be determined
Show Answer
Scratch Pad
Discuss
Correct Answer: is 12 V
7. The number of microamperes in 2 milliamperes is
Options
A. 2 ľA
B. 20 ľA
C. 200 ľA
D. 2,000 ľA
Show Answer
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Discuss
Correct Answer: 2,000 ľA
8. The total resistance of eight 5.6 kΩ resistors in series is
Options
A. 8 Ω
B. 5,600 Ω
C. 4,480 Ω
D. 44,800 Ω
Show Answer
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Discuss
Correct Answer: 44,800 Ω
9. A capacitor of 0.02 µF is larger than
Options
A. 0.000020 F
B. 200,000 pF
C. 2,000 pF
D. all of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: 2,000 pF
10. Four resistors are connected in parallel. Fifteen mA flows through resistor
R.
If the second resistor is 2
R
, the third resistor 3
R
, and the fourth resistor 4
R
, the total current in the circuit is
Options
A. 60 mA
B. 15 mA
C. 135 mA
D. 31.25 mA
Show Answer
Scratch Pad
Discuss
Correct Answer: 31.25 mA
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