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Electronics
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Inductors
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Question
Magnetic force is the force that produces a magnetic field.
Options
A. True
B. False
Correct Answer
True
Inductors problems
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1. Five time constants are required for current in an inductor to reach a maximum value.
Options
A. True
B. False
Show Answer
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Correct Answer: True
2. Inductors connected in series will increase the total inductance value.
Options
A. True
B. False
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Correct Answer: True
3. For inductions in series, L
T
= L
1
+ L
2
+ L
3
+...
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A. True
B. False
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Correct Answer: True
4. Kirchhoff's voltage law does not apply to series RL circuits.
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A. True
B. False
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Correct Answer: False
5. Lenz's law states that the current induced in a circuit due to a change in the magnetic field is so directed as to oppose the change in flux or to exert a mechanical force opposing the motion.
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A. True
B. False
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Correct Answer: True
6. Maximum power will transfer across a transformer when the primary impedance equals the secondary impedance.
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A. True
B. False
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Correct Answer: True
7. Inductance is proportional to the cross-sectional area of a coil.
Options
A. True
B. False
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Correct Answer: True
8. In a dc circuit, the only conversion of energy to heat is in the inductance of the coil itself.
Options
A. True
B. False
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Correct Answer: False
9. An RL filter could be a high-pass or a low-pass filter.
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A. True
B. False
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Correct Answer: True
10. The primary and secondary are in phase.
Options
A. True
B. False
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Correct Answer: False
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