Electrical Machines
In case of DC shunt motor if load is reduced

 DC Shunt Motor
 The speed will increase abruptly.
  The speed will remains almost constant.
 The speed will increase in proportion to reduction in load.

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Electrical Machines
In dc machines, the field system has to be provided on stator unlike synchronous machines Where in it could be on any member, because

 it gives more uniform air-gap flux distribution
 it reduces field structure iron losses
 dc machines are comparatively low rating machines.
 commutator action is not possible otherwise

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