Electrical Machines
Tappings of a transformer are provided

 at the middle of hv side
 at the phase end of lv side
 at the phase end of hv side
 at the neutral side end of hv side

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

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