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

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

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Electrical Machines
The mmf produced by rotor currents of a 3 - Φ induction motor

  is at standstill with respect to stator mmf.
  rotates at slip speed with respect to stator mmf.
  rotates at the speed of rotor in the air gap.
  rotates at synchronous speed with respect to rotor.

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