Electrical Machines
For standing a DC motor a starter is required because

  it limits the starting current to a safe value.
None of these
  it limits the speed of the motor.
  It starts the motor.

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Electrical Machines
Flashing of DC generator means

  increasing flux density by providing extra ampere-turns in field.
 neutralization of residual magnetism.
  creation of residual magnetism by a DC source.
None of these

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