Electrical Engineering - Inductors

Exercise :: Inductors - General Questions

21. 

The inductance of an iron-core coil decreases if

A. the number of turns is decreased
B. the iron core is removed
C. the length of the coil decreases
D. none of the above

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

22. 

The following coils are in parallel: 75 H, 40 H, 25 H, and 15 H. The total inductance is approximately

A. 6.9 H
B. 14 H
C. 2.2 H
D. 155 H

Answer: Option A

Explanation:

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23. 

When the current through an inductor is cut in half, the amount of energy stored in the electromagnetic field

A. is quartered
B. quadruples
C. doubles
D. does not change

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

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