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Electrical Machines

Electrical Machines
The torque developed in IM is nearly proportional to

  1 / V.
 1 / V2.
  V2.
  V.

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Electrical Machines
The direction of rotation of conductor of a DC motor can be determined by

 Lenz's law.
 Fleming's left hand rule.
 Fleming's right hand rule.
 Ampere law.

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Electrical Machines
In a Dc generator the magnetic neutral axis coincide with geometrical neutral axis, when

  the generator runs on designed speed.
  the generator runs on full load.
  the generator runs on overload.
  there is no load on the generator.

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Electrical Machines
The dc motor which can provide zero speed regulation at full load without any controller, is

 differential compound.
 shunt.
 series.
 cumulative compound.

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Electrical Machines
The output power indicated on the name plate of any motor is always the

 Output power at the shaft.
 Gross power.
 Power drawn in KVA.
 Power drawn in KW.

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Electrical Machines
No load saturation characteristics are plotted between

 no load voltage and armature current
 short circuit current and armature current
 no load voltage and field current
 short circuit current and field current

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