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Electrical Machines

Electrical Machines
The slip of an induction motor during DC rheostatic braking is

  2 - s.
 2 + s.
  s.
 1 - s.

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Electrical Machines
Field winding of a DC series motor is usually provided with thick wire

 in order to reduce eddy current to provide large flux.
 to provide large flux.
 as it carries large load current.
 to reduce the insulation of materials.

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Electrical Machines
DC generators are usually designed to develop armature voltages not exceeding 650 V because of the limitations imposed by

 field winding
 starters
 commutator
 armature winding

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Electrical Machines
Which of the following induction motor has the highest starting torque?

 Squirrel cage induction motor.
None of these
 Slip ring induction motor.
 Same in both induction motors.

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Electrical Machines
Rotating part of DC motor is known as

 Starter.
 Armature.
 Pole.
 Carbone brush.

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Electrical Machines
Two windings provided on the stator of 1-phase induction motor, one main winding and the other auxiliary winding are connected

 through inductive coupling
 in parallel
 either of these depending on the design of the motor
 in series

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