6- If a D.C. shunt motor is working at no load and if the shunt field circuit suddenly opens (a) Nothing will happen to the motor (b) This will make the armature take heavy current, possibly burning it (c) This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses (d) Motor will run at a very slow speed

Electric Motor Control
10th Edition
ISBN:9781133702818
Author:Herman
Publisher:Herman
Chapter43: About Dc Motors
Section: Chapter Questions
Problem 1SQ
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6- If a D.C. shunt motor is working at no load and if the shunt field circuit suddenly opens
(a) Nothing will happen to the motor
(b) This will make the armature take heavy current, possibly burning it
(c) This will result in excessive speed, possibly destroying armature due to excessive
centrifugal stresses
(d) Motor will run at a very slow speed
Transcribed Image Text:6- If a D.C. shunt motor is working at no load and if the shunt field circuit suddenly opens (a) Nothing will happen to the motor (b) This will make the armature take heavy current, possibly burning it (c) This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses (d) Motor will run at a very slow speed
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