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If a D.C. shunt motor is working at no load and if shunt field circuit suddenly opens | |
A. | nothing will happen to the motor [Wrong Answer] |
B. | this will make armature to take heavy current, possibly burning it [Wrong Answer] |
C. | this will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses [Correct Answer] |
D. | motor will run at very slow speed [Wrong Answer] |