A. increase in armature current
B. increase in flux
C. decrease in reactance
D. decrease in back emf
A. dc generator
B. dc motor
C. transformer
D. all of the above
A. decreases.
B. increases
C. remain same
D. none of the above
A. decreases
B. increases
C. remain same
D. none of the above
If the field winding resistance of a DC shunt motor is increases, its speed will
A. decreases
B. increases
C. remains same
D. none of the above
A. voltage control method
B. flux control method
C. rheostat control method
D. all of the above
A. not develop starting torque
B. fail to start without load
C. run at dangerously high speed
D. draw more current without producing sufficient torque
A. series with field winding
B. series speed armature winding
C. parallel big field winding
D. parallel with armature winding
A. decrease in speed
B. increase in speed
C. short circuit
D. open circuit