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Transformers
The noise produced by a transformer is termed as
hum
buzz
zoom
ringing
hum
buzz
zoom
ringing
Answer
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Related Question
Transformers
Which of the following is the main advantage of an auto-transformer over a two winding transformer?
Hysteresis losses are reduced
Eddy losses are totally eliminated
Saving in winding material
Copper losses are negligible
Hysteresis losses are reduced
Eddy losses are totally eliminated
Saving in winding material
Copper losses are negligible
Answer
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Transformers
The eddy current loss in a transformer is directly proportional to _______.
Square of thickness of core lamination
The supply frequency
The flux density in the core
Thickness of core lamination
Square of thickness of core lamination
The supply frequency
The flux density in the core
Thickness of core lamination
Answer
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Transformers
Losses which occur in rotating electric machines and do not occur in trans formers are
hysteresis and eddy current losses
copper losses
magnetic losses
friction and windage losses
hysteresis and eddy current losses
copper losses
magnetic losses
friction and windage losses
Answer
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Transformers
The winding of the transformer with greater number of turns will be _____
High voltage winding
Low voltage winding
None of the listed here
Either high or low voltage winding
High voltage winding
Low voltage winding
None of the listed here
Either high or low voltage winding
Answer
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Transformers
How many primary volts must be applied to a transformer with a turns ratio of 0.1 to obtain a secondary voltage of 9 V?
900 V
9 V
0.9 V
90 V
900 V
9 V
0.9 V
90 V
Answer
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