there is no supply voltage

the supply voltage is more than the capacity of the motor

the brush length is reduced by 10%

there is no load on the motor at the time of starting

interchanging the field connections only

interchanging the armature connections only

interchanging either the field or armature connections

none of the above

earthed field winding

short-circuited armature winding

motor is run above its rated speed

applied voltage is high

Capacitor-start motor

Capacitor-run motor

Repulsion-start induction-run motor

Double capacitor motor

Variation of speed with load

Low power factor

Tendency to produce sparking at the brushes

All the above