Electrical Machines
Flashing the field of DC generator means

  making the magnetic losses forces parallel.
  neutralising residual magnetism.
  creating residual magnetism by a DC source.
 increasing flux density by adding extra turns of winding.

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Electrical Machines
In case of a DC Shunt motor if the load is decreased to some extent, what will happen to its speed?

 The speed will increase gradually.
 The speed will remains almost constant.
 The speed will increase abruptly.
 The speed will increase in proportion to reduction in load.

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