Which motor is normally free from mechanical and magnetic vibrations ?
A. Split phase motor
B. Universal motor
C. Hysteresis motor
D. Shaded pole motor
A. Split phase motor
B. Universal motor
C. Hysteresis motor
D. Shaded pole motor
A. brush axis is at 45° electrical to the field axis
B. brush axis coincides with the field axis
C. brush axis is at 90° electrical to the field axis
D. none of the above
A. it is comparatively cheaper
B. it has almost non-destructible capacitor
C. it has low starting as well as running currents at relatively high power factor
D. it is quiet in operation
A. armature
B. field
C. rotor
D. stator
A. running winding only
B. starting winding only
C. either A. or (b)
D. both A. and (b)
A. Capacitor run motor
B. Shaded pole motor
C. Hysteresis motor
D. Schrage motor
A. become unstable
B. draw excessive armature current and may burn out
C. fall out of synchronism and come to stand still
D. run as induction motor