Single Phase Motors
In a universal motor, the most common cause of brush sparking is

shorted field winding?
all of these
open armature winding
high commutator mica

ANSWER DOWNLOAD EXAMIANS APP

Single Phase Motors
The rotor slots, in an induction motor, are usually not quite parallel to the shaft because it

improves the power factor
improves the efficiency
helps in reducing the tendency of the rotor teeth to remain under the stator teeth
helps the rotor teeth to remain under the stator teeth

ANSWER DOWNLOAD EXAMIANS APP