Electrical Machines
Maximum power developed in a cylindrical synchronous machine depends on

 excitation
 synchronous reactance
 load angle
 both 1and 2

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Electrical Machines
With the increase in speed of DC motor

 Both back emf as well as line current increase.
  Back emf increase but line current falls.
 Both back emf as well as line current fall.
 Back emf falls and line current increase.

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