Electrical Machines
If the field circuit of a DC shunt motor is opened

 The speed of motor will be reduced.
 DC Shunt Motor
 The armature current will reduce.
  The motor will attain dangerously high speed.

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Electrical Machines
The factors that are responsible for decrease in terminal voltage of a shunt generator are

  reduction in field current, effect of armature reaction, armature.
 armature resistance, effect of armature reaction.
  armature resistance, effect of armature reaction.
 armature resistance, inter poles, armature.

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