Electrical Machines
During hunting of a synchronous motor

  harmonic are developed in the armature circuit.
  negative phase sequence currents are generated.
  damper bar develops torque.
  field excitation increases.

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

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