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Transformers
The maximum efficiency of a distribution transformer is
at no load
at 80% full load
at 50% full load
at full load
at no load
at 80% full load
at 50% full load
at full load
Answer
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Related Question
Transformers
A transformer does not posses ______changing property.
Voltage
Current
Power
Impedance
Voltage
Current
Power
Impedance
Answer
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Transformers
The flux in the core of a single phase transformer is _____
Purely alternating one
Partly alternating and partly rotating
Purely rotating one
None of the listed here
Purely alternating one
Partly alternating and partly rotating
Purely rotating one
None of the listed here
Answer
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Transformers
The output current corresponding to the maximum efficiency for a transformer having core loss of 200 W and equivalent resistance referred to secondary of 0.5 Ω is
5 A
15 A
10 A
20 A
5 A
15 A
10 A
20 A
Answer
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Transformers
What is the coefficient of coupling for a transformer in which 4% of the total flux generated in the primary does not pass through the secondary?
0.96
4
0.4
9.6
0.96
4
0.4
9.6
Answer
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Transformers
Short circuit test on transformers is conducted to determine
core losses
hysteresis losses
copper losses
eddy current losses
core losses
hysteresis losses
copper losses
eddy current losses
Answer
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