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Electrical Machines

Electrical Machines
In dc motors, under leading pole tips flux density will--------?

 increase
None of these
 decrease
 either increase or decrease

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Electrical Machines
A DC shunt generator builds up 230 V when driven in clockwise direction. In case it is driven in anti clockwise direction, other things remaining unchanged, then the voltage build up is

 not possible
 230 V
 some what more than 230 V
 some what less than 230 V

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Electrical Machines
In diesel engine, gas engine type of machine contains ___________________ pole type of alternator.

  salient.
 non uniform cylindrical.
 cylindrical.
 none of these.

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Electrical Machines
Stepper motor is used in

 traction
 computer printers
 food processing
All of these

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Electrical Machines
In travelling cranes for crane travel, trolley and boom hoist which motor is preferred?

  Slip ring induction motor.
  Synchronous motor.
  DC differential compound motor.
  Stepper motor.

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Electrical Machines
Generator works on the principle of production

None of these
 static induced emf.
 both A and B.
 dynamically induced emf.

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