inductors electronics question and answers -Page 10

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Inductors problems

1. What is the total inductance of a 5 H and a 100 mH coil connected in parallel?
Options
A. 4.76 mH
B. 33.3 mH
C. 98.0 mH
D. 150.0 mH

Correct Answer: 98.0 mH

2. What does Faraday's law concern?
Options
A. a magnetic field in a coil
B. a magnetic field cutting a conductor
C. a magnetic field hystersis
D. a magnetic field in a conductor

Correct Answer: a magnetic field cutting a conductor

3. X_L = 2ΠfL
Options
A. True
B. False

Correct Answer: True

4. Self-inductance is the property that causes an electromotive force to be produced in a conductor.
Options
A. True
B. False

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.
Options
A. True
B. False

Correct Answer: True

6. Kirchhoff's voltage law does not apply to series RL circuits.
Options
A. True
B. False

Correct Answer: False

7. For inductions in series, L_T = L₁ + L₂ + L₃ +...
Options
A. True
B. False

Correct Answer: True

8. Inductors connected in series will increase the total inductance value.
Options
A. True
B. False

Correct Answer: True

9. Five time constants are required for current in an inductor to reach a maximum value.
Options
A. True
B. False

Correct Answer: True

10. Magnetic force is the force that produces a magnetic field.
Options
A. True
B. False

Correct Answer: True

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