Electrical Machines
A belt-driven cumulatively-compound dc generator is delivering power to the dc mains. If the Belt snaps then the machine will run as a

 cumulative compounded motor in the same direction
 cumulative compounded motor in opposite direction
 differentially compounded motor in the same direction
 differentially compounded motor in the opposite direction

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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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