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Electrical Machines

Electrical Machines
Example of double excited machine is

 Both are correct.
 Synchronous motor.
 DC Shunt Motor
None of these

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Electrical Machines
The commutator segments of DC machines are made up of

 brass
 hard-drawn copper
 copper alloy
 copper

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Electrical Machines
The power input to a 3 - φ induction motor is 60 kW and stator loss is 1 kW the rotor cu loss per phase is

 1.
  slip X 69 / 3.
  slip X 59 / 3.
  slip X 50 / 3.

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Electrical Machines
In which transformer, the tertiary winding is used?

 Delta - star
 Star - delta
 Star - star
 Delta - delta

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Electrical Machines
A Shunt generator running at 1000 rpm has generated emf of 100 V. If the speed increases to 1200 rpm, the generated emf will be nearly

 120 V
 175 V
 240 V
 140 V

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Electrical Machines
An ideal DC generated is one that has _____________ voltage regulation.

 negative.
 positive.
 low.
  zero.

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