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Transformers
The eddy current loss in a transformer is directly proportional to _______.
The flux density in the core
Square of thickness of core lamination
Thickness of core lamination
The supply frequency
The flux density in the core
Square of thickness of core lamination
Thickness of core lamination
The supply frequency
Answer
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Related Question
Transformers
Natural oil cooling is used for transformers up to a rating of
250 kVA
3000 kVA
500 kVA
1000 kVA
250 kVA
3000 kVA
500 kVA
1000 kVA
Answer
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Transformers
If a transformer has 50 turns in the primary winding and 10 turns in the secondary winding, what is the reflective resistance if the secondary load resistance is 250 ?
250 Ω
25 Ω
62500 Ω
6250 Ω
250 Ω
25 Ω
62500 Ω
6250 Ω
Answer
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Transformers
The steel used for transformer core has
High permeability
All of the listed here
High silicon content
Low hysteresis loss
High permeability
All of the listed here
High silicon content
Low hysteresis loss
Answer
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Transformers
The iron core is used to ______of the transformer.
Increase the wight
None of the listed here
Reduce core loss
Provide tight magnetic coupling
Increase the wight
None of the listed here
Reduce core loss
Provide tight magnetic coupling
Answer
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Transformers
Losses which occur in rotating electric machines and do not occur in trans formers are
friction and windage losses
hysteresis and eddy current losses
magnetic losses
copper losses
friction and windage losses
hysteresis and eddy current losses
magnetic losses
copper losses
Answer
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