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ELECTRICAL MACHINES

Electrical Machines
The stator core of a 3 - Φ induction motor is laminated in order to reduce the

  weight of the stator.
  eddy current loss.
  hysteresis loss.
  both of the above.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In a three phase slip-ring induction motor, brushes are connected to

  DC supply.
  external star-connected resistors.
  equalizing coils.
  3 - Φ AC supply.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The rotor winding for a 3-phase slip-ring induction motor having delta-connected stator must be connected in

  delta.
None of these
  star.
  delta or star according to need.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
The squirrel cage induction motors are provided with blades in order to

  eliminate noise.
  facilitate cooling of rotor.
  balance the rotor dynamically.
  none of these.

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Electrical Machines
Induction motors normally use cast aluminium rotor because aluminium is

  of low resistivity.
  cheaper in cost.
  lighter in weight.
  easy to cast owing to its low melting point and is easily available.

ANSWER DOWNLOAD EXAMIANS APP
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