Electrical Engineering - Transformers

Exercise :: Transformers - General Questions

21. 

In a certain transformer, the input power to the primary is 120 W. If 8.5 W are lost to the winding resistance, what is the output power to the load, neglecting any other issues?

A. 0 W
B. 14.1 W
C. 111.5 W
D. 1,020 W

Answer: Option C

Explanation:

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

22. 

When a 6 V battery is connected across the primary of a transformer with a turns ratio of 8, the secondary voltage is

A. 0 V
B. 6 V
C. 48 V
D. 0.75 V

Answer: Option A

Explanation:

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23. 

What is the coefficient of coupling for a transformer in which 4% of the total flux generated in the primary does not pass through the secondary?

A. 0.4
B. 4
C. 9.6
D. 0.96

Answer: Option D

Explanation:

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24. 

A transformer has a 1:6 turns ratio and a secondary coil load resistance of 470 . The load resistance as seen by the source is

A. 1.3
B. 7.8
C. 78
D. 13

Answer: Option D

Explanation:

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

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