Electrical Machines
A differentially compound motor under high-over-load conditions will behave like a / an

  series motor.
 AC synchronous motor.
 cummulative compound motor.
 shunt motor.

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Electrical Machines
With the increase in speed of DC motor

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

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