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

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

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Electrical Machines
An inverted V curve of synchronous motor shows variation of

 power factor and supply voltage during hunting.
 supply voltage and field current at constant excitation.
  power factor and DC excitation at constant load.
 supply voltage and excitation current at constant load.

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