inductors electronics question and answers -Page 13

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Inductors problems

1. A transformer can be designed to step up or step down dc voltage.
Options
A. True
B. False

Correct Answer: False

2. The current through an inductor in a parallel RL circuit leads the current through the resistor.
Options
A. True
B. False

Correct Answer: True

3. The primary winding of a transformer is the side connected to the load.
Options
A. True
B. False

Correct Answer: False

4.

The total inductance in the given circuit is 0.6 mH.
Options
A. True
B. False

Correct Answer: True

5. An air-core inductor has a metal core.
Options
A. True
B. False

Correct Answer: False

6. The ___ of a coil is the inherent resistance of the wire.
Options
A. ac resistance
B. reactance
C. winding resistance
D. permeability

Correct Answer: winding resistance

7. The ___ cannot change instantaneously in an inductor.
Options
A. voltage
B. current
C. power
D. magnetic field

Correct Answer: current

8.

The inductance value of L₃ in the given figure is _____ if the total inductance is 340 mH.
Options
A. 150 mH
B. 220 mH
C. 295 mH
D. 315 mH

Correct Answer: 150 mH

9. After the first time constant, a transient current has changed by _______________ %, leaving _______________ % remaining.
Options
A. 63.2, 36.8
B. 36.8, 63.2
C. 13.5, 86.5
D. 86.5, 13.5

Correct Answer: 63.2, 36.8

10. Inductive ___ represents the opposition to an alternating current.
Options
A. impedance
B. resistance
C. reluctance
D. reactance

Correct Answer: reactance

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