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Transformers
A no-load test is performed on a transformer to determine
copper loss
core loss
magnetising current
efficiency
magnetising current and loss
copper loss
core loss
magnetising current
efficiency
magnetising current and loss
Answer
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Related Question
Transformers
The efficiencies of transformers compared with that of electric motors of the same power are
about the same
much smaller
somewhat smaller
much higher
about the same
much smaller
somewhat smaller
much higher
Answer
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Transformers
A transformer oil must be free from
Gases
Odour
Sludge
Moisture
Gases
Odour
Sludge
Moisture
Answer
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Transformers
A transformer has a 1:6 turns ratio and a secondary coil load resistance of 470 . The load resistance as seen by the source is
1.3 Ω
7.8 Ω
13 Ω
78 Ω
1.3 Ω
7.8 Ω
13 Ω
78 Ω
Answer
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Transformers
An ideal transformer is one which _______
Has no losses and leakage reactance
Does not work
Has same number of primary and secondary turns
None of the listed here
Has no losses and leakage reactance
Does not work
Has same number of primary and secondary turns
None of the listed here
Answer
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Transformers
Sumpner's test is conducted on transformer to determine
All day efficiency
None of the listed here
Temperature
Stray losses
All day efficiency
None of the listed here
Temperature
Stray losses
Answer
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