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Home
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Electrical Engineering
‣
Three-Phase Systems in Power Applications
See What Others Are Saying!
Question
The most common type of ac motor is the
Options
A. single-phase induction motor
B. two-phase induction motor
C. three-phase induction motor
D. two-phase
squirrel-cage
motor
Correct Answer
three-phase induction motor
More questions
1. Norton's equivalent current (
I
N
) is an open-circuit current between two points in a circuit.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
2. A 6 kHz sinusoidal voltage is applied to a series
RC
circuit. The frequency of the voltage across the resistor is
Options
A. 0 Hz
B. 12 kHz
C. 6 kHz
D. 18 kHz
Show Answer
Scratch Pad
Discuss
Correct Answer: 6 kHz
3. The mutual inductance when
k
= 0.65,
L
1
= 2 µH, and
L
2
= 5 µH is
Options
A. 2 mH
B. 2 µH
C. 4 µH
D. 8 µH
Show Answer
Scratch Pad
Discuss
Correct Answer: 2 µH
4. An ammeter is an electrical instrument used to measure
Options
A. current
B. voltage
C. resistance
D. none of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: current
5. A series circuit consists of three resistors. Two resistors are 1.2 kΩ each. The total resistance is 12 kΩ. The value of the third resistor
Options
A. is 9,600 Ω
B. is 960 Ω
C. is 1.2 kΩ
D. cannot be determined
Show Answer
Scratch Pad
Discuss
Correct Answer: is 9,600 Ω
6. In a certain low-pass filter,
f
c
= 3.5 kHz. Its passband is
Options
A. 0 Hz to 3.5 kHz
B. 0 Hz
C. 3.5 kHz
D. 7 kHz
Show Answer
Scratch Pad
Discuss
Correct Answer: 0 Hz to 3.5 kHz
7. A 90 Ω resistor, a coil with 30 Ω of reactance, and a capacitor with 50 Ω of reactance are in series across a 12 V ac source. The current through the resistor is
Options
A. 9 mA
B. 90 mA
C. 13 mA
D. 130 mA
Show Answer
Scratch Pad
Discuss
Correct Answer: 130 mA
8. When the speed at which a conductor is moved through a magnetic field is increased, the induced voltage
Options
A. increases
B. decreases
C. remains constant
D. reaches zero
Show Answer
Scratch Pad
Discuss
Correct Answer: increases
9. A red, red, orange, gold resistor has a nominal value of
Options
A. 22,000 Ω
B. 2,200 Ω
C. 22 Ω
D. 2.2 Ω
Show Answer
Scratch Pad
Discuss
Correct Answer: 22,000 Ω
10. Second-order determinants are evaluated by subtracting the signed cross-products.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
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Parallel Circuits
Passive Filters
Quantities and Units
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Series Circuits
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Three-Phase Systems in Power Applications
Time Response of Reactive Circuits
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