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DIRECT CURRENT MOTORS; THEIR FAULTS CAUSES AND REMEDIES MCQs – CHAPTER 5 DAE

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1. No of slip rings in D.C motor is:





2. Brushes of D.C motor are made of:





3. Armature reaction of an unsaturated D.C motor is:





4. The back e.m.f in a D.C motor:





5. The speed of D.C motor can be varied by varying:





6. When the speed of D.C motor increases, its armature current:





7. Types of D.C motor:





8. Motor runs backward, possible reasons:





9. D.C motor heats up during running:





10. The speed of D.C motor is:





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