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Electrical Machines
The constant losses in transformer is/are
eddy current loss.
both 2 and 3.
copper loss.
hysteresis loss.
eddy current loss.
both 2 and 3.
copper loss.
hysteresis loss.
Answer
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Related Question
Electrical Machines
Which of the following is/are the methods to reduce the armature reaction and its effects?
All of these
pole chamfering
compensating winding
pole stacking
All of these
pole chamfering
compensating winding
pole stacking
Answer
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Electrical Machines
What will be the eddy current loss if the supply frequency of a transformer becomes double?
Eight times.
Doubled.
Remains same.
Four times.
Eight times.
Doubled.
Remains same.
Four times.
Answer
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Electrical Machines
Voltage regulation can be determined by which of the following?
ZPF method.
MMf method.
All of these
Synchronous impedance method.
ZPF method.
MMf method.
All of these
Synchronous impedance method.
Answer
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Electrical Machines
A transformer has maximum efficiency at 3/4 load. The ratio of iron loss and full load copper loss is
9/16.
4/3.
16/9.
3/4.
9/16.
4/3.
16/9.
3/4.
Answer
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Electrical Machines
When the mechanical power is developed by a DC motor maximum
Back emf is equal to half of applied voltage.
Back emf is equal.
back emf is equal to applied voltage.
None of above.
Back emf is equal to half of applied voltage.
Back emf is equal.
back emf is equal to applied voltage.
None of above.
Answer
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