Electrical Machines
A DC shunt generator builds up 230 V when driven in clockwise direction. In case it is driven in anti clockwise direction, other things remaining unchanged, then the voltage build up is

 some what less than 230 V
 230 V
 some what more than 230 V
 not possible

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Electrical Machines
With the increase in speed of DC motor

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

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