D.C. Motors

A. dc generator
B. dc motor
C. transformer
D. all of the above

A. increase in armature current
B. increase in flux
C. decrease in reactance
D. decrease in back emf

A. runs as a generator
B. does not run as a generator
C. also runs as a motor comes to stop after sometime

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. the field
B. the armature
C. the brushes
D. the commutator

A. Series motor
B. Shunt motor
C. Cumulatively compounded motor
D. Differentially compounded motor

A. series motor
B. shunt motor
C. compound motor
D. any of the above

A. series motor
B. shunt motor
C. compound motor
D. any of the above

A. this will make armature to take heavy current, possibly burning it
B. this will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses
C. nothing will happen to motor
D. motor will come to stop

A. drum type controller is used
B. three point starter is used
C. four point starter is used
D. all above can be used