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Electrical Machines

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

 T ∝ 1/V
 T∝ V²
 T ∝ V
 T ∝ 1/V²

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Electrical Machines
In travelling cranes for swing action which motor is preferred?

  Capacitor type induction motors.
  Reluctance motor.
  DC series motor.
  AC slip ring IM.

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Electrical Machines
A 3 - Φ slip ring motor has

  wound rotor.
  short-circuited rotor.
  any of the above.
  double cage rotor.

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Electrical Machines
In a single phase induction motor, the starting torque developed is proportional to

 V²
 1/V²
 1/V
 supply voltage V

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Electrical Machines
Which type of single phase induction motor is having the highest power factor at full load ?

 Shaded pole type.
 Capacitor start.
 Split phase type.
  Capacitor run type.

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Electrical Machines
Breadth factor is defined as the ratio of

 both 1 and 2.
 emf with concentrated winding to emf with distributed winding.
 emf with distributed winding to emf with concentrated winding.
None of these

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