Electrical Machines
When a DC cummulative compound wound motor is loaded

 Torque and speed both increase.
  Torque increase and speed decrease.
 Torque decrease and speed increases.
 Both torque and speed decrease.

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Electrical Machines
For satisfactory parallel operation of two transformers which of the following conditions is most essential,

 MVA rating of all transformer inversely proportional to impedance.
 percentage impedance of all transformers must be same.
 voltage ratio of all transformers must be same.
  polarities of all transformers must be same.

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