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

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Electrical Machines
In a DC machine, for the same value of φ, Z and N; which one of the following statements is correct?

 Armature emf depends on weather the machine is running as a motor or generator.
 Armature emf is less with wave winding than with lap winding.
 Armature emf is same as long as the flux density in the air gap remains the same.
  Armature emf is more with wave winding than with lap winding.

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