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Transformers

Transformers
A transformer has 200 W as iron loss at full load. The iron loss at full load. The iron loss at half full load will be

50 W
200 W
400 W
100 W

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Transformers
A transformer will work on

Ac only
Dc only
None of the listed here
AC as well as DC

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Transformers
Efficiency of a power transformer is of the order of

98 per cent
100 per cent
50 per cent
25 per cent

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Transformers
The winding of the transformer with greater number of turns will be _____

High voltage winding
Low voltage winding
Either high or low voltage winding
None of the listed here

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Transformers
Which of the following transformer is smallest?

2kVA, 200 Hz
2kVA, 50 Hz
2kVA, 500 Hz
2kVA, 400 Hz

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Transformers
A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is

5
0.2
25
0.4

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