Engine: Electricity

1. A The rotor windings via slip rings and brushes are connected to a three phase AC power source, and the stator winding is directly connected to a DC power source.
2. B The rotor winding via slip rings and brushes is connected to a single phase AC power source, and the stator winding is directly connected to a three phase AC power source.
3. C The rotor winding via slip rings and brushes is connected to a DC power source, and the stator windings are directly connected to a three phase AC power source.
4. D The rotor winding via slip rings and brushes is connected to a three phase AC power source, and the stator winding is directly connected to a single phase AC power source.

Tip: press A-D to answer