A. silicon steel
B. copper
C. non-ferrous material
D. cast-iron
A. demagnetisation of leading pole tip and magnetisation of trailing pole tip
B. demagnetisation of trailing pole tip and magnetisation of leading pole tip
C. damagnetising the center of all poles
D. magnetising the center of all poles
A. motion of conductor
B. lines of force
C. either of the above
D. none of the above
A. just ahead of magnetic neutral axis
B. in magnetic neutral axis
C. just behind the magnetic neutral axis
D. none
A. length of conductor
B. cross-sectional area of the conductor
C. number of conductors
D. all of the above
A. speed
B. load
C. voltage
D. speed and voltage
A. to avoid sudden loading of the primemover
B. to avoid mechanicaljerk to the shaft
C. to avoid burning of switch contacts
D. all above