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Electrical Machines

Electrical Machines
The emf induced in a conductor rotating in a bipolar field is

 AC.
 both of above.
None of these
 DC.

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Electrical Machines
The shaft torque of a dc motor is less than the electromagnetic torque because of

  eddy current losses.
  ohmic losses.
  hysteresis losses.
  mechanical losses.

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Electrical Machines
The wound rotor type IM is used for____________ speed operation.

  minimum.
  variable.
  constant.
  maximum.

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Electrical Machines
The heat generated in the transformer is dissipated mainly by

All of these
  convection.
 radiation.
 conduction.

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Electrical Machines
In a 3-phase induction motor, torque and supply voltage are related as

 T∝ V²
 T ∝ 1/V²
 T ∝ V
 T ∝ 1/V

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Electrical Machines
Slip rings of an induction motors are made of

  phosphor bronze.
  carbon.
  stainless steel.
  aluminium.

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MORE MCQ ON Electrical Machines

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