Electrical Machines
The armature core of a DC machine is laminated to minimise

 temperature rise
 hysteresis loss
 mechanical loss
 eddy-current loss

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Electrical Machines
Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are 4% and 5% from no load to full load. Consider the governors operating at 50Hz on no load. How will the machine share, if the load is 600 MW?

 generator 2 gets over load
None of these
 200 MW and 400MW
 generator 1 gets over load

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Electrical Machines
Commutation in a DC machine may be explained as a process

 by virtue of which emf is induced in the armature conductors.
 how alternate flux affects the main field flux.
  in which magnetic field is set up.
  by which electric current in a coil is reversed.

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