Electrical Machines
Flashing the field of DC generator means

  creating residual magnetism by a DC source.
  making the magnetic losses forces parallel.
  neutralising residual magnetism.
 increasing flux density by adding extra turns of winding.

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Which of the following is done in speed control of DC motor by field flux control?

 Inserting resistance to armature circuit and field circuit.
 Inserting an additional resistance in the armature circuit.
 Inserting an additional resistance in the field circuit.
 Any of above.

ANSWER DOWNLOAD EXAMIANS APP