Q
If a D.C. shunt motor is working at no load and if shunt field circuit suddenly opens__________?
AA. Nothing will happen to the motor
BB. This will make armature to take heavy current, possibly burning it
CC. This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses d. motor will run at very slow speed
Correct Answer:
C. C. This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses d. motor will run at very slow speed
