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Electrical Machines

Electrical Machines
Eddy current loss will depends on

 Flux density
 Thickness
All of these
 Frequency

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Electrical Machines
Belt conveyors offer _______________ starting torque.

  high.
  zero.
  medium.
  low.

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Electrical Machines
A DC series motor is accidentally connected to single phase ac supply voltage. The torque produced will be

 steady and unidirectional
None of these
 oscillating
 pulsating and unidirectional

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Electrical Machines
A dc motor with armature resistance of 0.5 ohms connected directly to a 230 Volt supply. If the armature is stationary then the current flowing through armature is

  340 A.
 570 A.
 250 A.
  460 A.

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Electrical Machines
An auto transformer having a transformation ratio of 0.8 supplies a load pf 10 KW. The power transfered inductively from the primary to secondary is

  2 KW.
 0.
 10 KW.
 8 KW.

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Electrical Machines
Which method is less recommendable for induction motor starting in the industries?

  Auto transformer starting.
  Stator resistance starting.
  Rotor resistance starting.
  Direct online starting.

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MORE MCQ ON Electrical Machines

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