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Electrical Machines

Electrical Machines
When flux density is constant in a transformer, hysteresis loss varies as

 V²
 f²
 V
 f

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Electrical Machines
A DC generator can be considered as

 rectifier.
 prime mover.
 rotating amplifier.
 power pump.

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Electrical Machines
Generators work on the principle of production of

None of these
 dynamically and statically induced emf.
 statically induced emf.
 dynamically induced emf.

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Electrical Machines
Lamination of transformer core is made of

 wrought iron.
 cast steel.
  silicon steel.
  cast iron.

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Electrical Machines
When a transformer is loaded, the secondary terminal voltage drops. That means power factor is

 leading.
  lagging.
 unity.
 zero.

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Electrical Machines
Slip test is performed to determine

 direct axis reactance and quadrature axis reactance
All of these
 positive sequence reactance and negative sequence reactance
 slip

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MORE MCQ ON Electrical Machines

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