In a universal motor, the most common cause of brush sparking is___________?

Related Mcqs:

Direction of rotation of a split phase motor can be reversed by reversing the connection of__________?

A. running winding only B. starting winding only C. either A. or (b) D. both A. and (b)...

Which of the following motors will operate at high power factor ?

A. Shaped pole motor B. Split phase motor C. Capacitor start motor D. Capacitor run motor...

The speed of a universal motor is usually reduced by using____________?

A. gearing B. belts C. brakes D. chains...

Speed torque characteristic of a repulsion induction motor is similar to that of a D.C____________?

A. shunt motor B. series motor C. compound motor D. separately excited motor...

A repulsion motor is equipped with__________?

A. slip rings B. commutator C. both A. and (b) D. none of the above...