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Transformers

Transformers
Which of the following parts of a transformer is visible from outside?

Primary winding
Core
Bushings
Secondary winding

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Transformers
The primary winding of a transformer has 110 V ac across it. What is the secondary voltage if the turns ratio is 8?

8,800 V
880 V
88 V
8.8 V

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Transformers
If a transformer core has air gaps, then, _________

Reluctance of magnetic path is decreased
Eddy current is increased
Magnetising current is greatly increased
Hysteresis loss is decreased

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Transformers
We can find _______of the transformer with open circuit test.

Total equivalent leakage reactance
Copper losses
Turn ratio
Total equivalent resistance

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Transformers
In an auto transformer, the primary and secondary are _____ coupled.

None of the listed here
Only magnetically
Only electrically
Magnetically as well as electrically

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Transformers
The principle of working of transformer is

Static induction
Self induction
Mutual induction
Dynamic induction

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