Category: D.C. Motors

A. residual magnetism of the generator
B. core losses of motor
C. mechanical losses of motor and generator together
D. all of the above

A. current in the conductor aovtaat of conductor
C. resultant force on conductor
D. none of the above

A. reducing the field current
B. decreasing the armature current
C. increasing the armature current
D. increasing the excitation current
E. none of the above methods

A. Field control
B. Armature voltage control
C. Shunt armature control
D. Mechanical loading system

A. the speed of motor will be reduced %
B. the armature current will reduce
C. the motor will attain dangerously high speed 1
D. the motor will continue to nuvat constant speed

A. level compounded
B. under compounded
C. cumulatively compounded
D. differentially compounded

A. 2.36%
B. 4.76%
C. 6.77%
D. 8.84%

A. 100 W
B. 500 W
C. 1000 W
D. 1500 W

A. Series motor
B. Shunt motor
C. Differentially compound motor
D. Cumulative compound motor

A. eddy current losses = stray losses
B. hysteresis losses = eddy current losses
C. copper losses = 0
D. variable losses = constant losses