Electrical Machines
If the load current and flux of a DC motor are held constant and voltage applied across it armature is increased by 5%, the speed of the motor will

  Increase by 5%.
 Depends on other factor.
 Remain unchanged.
 Reduce by 5%.

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Electrical Machines
With the increase in speed of a DC motor

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

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