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Transformers

Transformers
Which of the following transformer is smallest?

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

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Transformers
The noise produced by a transformer is termed as

buzz
ringing
hum
zoom

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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?

880 V
8.8 V
88 V
8,800 V

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Transformers
The flux in the core of a single phase transformer is _____

Purely alternating one
Partly alternating and partly rotating
None of the listed here
Purely rotating one

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Transformers
In a transformer the energy is conveyed from primary to secondary

through air
through cooling coil
None of these
by the flux

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Transformers
The no load ratio of a 50 Hz single phase transformer is 6000/250 V. The maximum flux in the core is 0.06 Wb. What is the number of primary turns?

450
900
350
210

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