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

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

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
For a given torque, reducing divertor resistance of a DC series motor

  Increase in speed demanding more armature current.
  Increase in speed but armature currnet remains the same.
  Decrease in speed demanding less armature current.
  Decrease in speed but armature current remains the same.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Armature reaction in a DC machine

  makes an angle of 90° with the main pole axis.
 is in the same direction as the main poles.
 is in direct opposition to the main poles.
 makes an angle with the main pole axis which is load dependent.

ANSWER DOWNLOAD EXAMIANS APP