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Transformers
The temperature rise of transformer is directly proportional to _______
None of the listed here
Apparent power
Leakage reactance
Reactive power
None of the listed here
Apparent power
Leakage reactance
Reactive power
Answer
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Related Question
Transformers
The main reason for generation of harmonics in a transformer could be
mechanical vibrations
saturation of core
fluctuating load
poor insulation
mechanical vibrations
saturation of core
fluctuating load
poor insulation
Answer
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Transformers
The maximum efficiency of a distribution transformer is
at no load
at 50% full load
at full load
at 80% full load
at no load
at 50% full load
at full load
at 80% full load
Answer
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Transformers
To step 110 V ac down to 20 V ac, the turns ratio must be
0.018
18
0.18
5.5
0.018
18
0.18
5.5
Answer
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Transformers
The eddy current loss in a transformer is directly proportional to _______.
Thickness of core lamination
The supply frequency
Square of thickness of core lamination
The flux density in the core
Thickness of core lamination
The supply frequency
Square of thickness of core lamination
The flux density in the core
Answer
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Transformers
The power efficiency of a lightning transformer is always ______its all day efficiency.
Less than
None of the listed here
Equal to
Higher than
Less than
None of the listed here
Equal to
Higher than
Answer
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