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

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

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Electrical Machines
Flashing of DC generator means

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

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