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Electrical Machines

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

 supply voltage V
 V²
 1/V²
 1/V

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Electrical Machines
Belt conveyors offer _______________ starting torque.

  high.
  low.
  medium.
  zero.

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Electrical Machines
A 230 volt dc motor has an armature winding resistance of 0.5 ohm. Calculate the emf induced by the motor if the full load armature current is 23 ampere.

  120 volt.
  218.5 volt.
 220.4 volt.
  None of these.

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Electrical Machines
For P pole machine relation between electrical degrees and mechanical degrees is

 θelec = θmech
 θelec = 4/P*θmech
 θelec = 2/P*θmech
 θelec = P/2*θmech

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Electrical Machines
The brushes of a DC machine should be placed on the

 commutator in the inter polar axis.
 commutator in the polar axis.
 armature in the polar axis.
 armature midway between poles.

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Electrical Machines
A single-winding single-phase motor has

 starting torque equal to full-load torque.
 high starting torque.
  zero starting torque.
 low starting torque.

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MORE MCQ ON Electrical Machines

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