Electronics - Inductors

Exercise :: Inductors - Filling the Blanks

1. 

After a voltage has been applied to an inductor, the current will be ___ of its full value after 2 time constants.

A. 63%
B. 86%
C. 95%
D. 98%

Answer: Option B

Explanation:

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2. 

The ___ of a coil is the inherent resistance of the wire.

A. ac resistance
B. reactance
C. winding resistance
D. permeability

Answer: Option C

Explanation:

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3. 

The inductive reactance of L2 is _____ in the given circuit.

A. 3.5 komega.gif
B. 4.4 komega.gif
C. 16.3 komega.gif
D. 23.3 komega.gif

Answer: Option B

Explanation:

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4. 

___ power represents the energy dissipated at a given point in time.

A. True
B. Reactive
C. Real
D. Instantaneous

Answer: Option D

Explanation:

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5. 

After the first time constant, a transient current has changed by _______________ %, leaving _______________ % remaining.

A. 63.2, 36.8
B. 36.8, 63.2
C. 13.5, 86.5
D. 86.5, 13.5

Answer: Option A

Explanation:

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