Electrical Machines
Armature resistance control method is also called as-----------?

 constant torque control
 constant power control
 constant current control
 constant voltage control

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Electrical Machines
Where the shunt generators are widely used?

 Where the load is very high.
  Where a constant voltage is required over a narrow load range.
 Where voltage variation is needed over a wide load range.
 Where often load fluctuation is occurred.

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Electrical Machines
With the increase in speed of a DC motor

 back emf falls and line current increases.
 both back emf as well as line current increase.
 back emf increases but line current falls.
 both back emf as well as line current fall.

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