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

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

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Electrical Machines
With the increase in speed of DC motor

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

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