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Which of the followingfactors improve commutationin a dc machine?1. High contact resistance ofbrushes2. High inductance of the coilsundergoing commutation3. Shifting of brushes in thedirection of rotation for agenerator and in the oppositedirection for motor4. Narrow width for thecommutation bars Select thecorrect answer using thecodes given below: Codes:

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Which of the followingfactors improve commutationin a dc machine?1. High contact resistance ofbrushes2. High inductance of the coilsundergoing commutation3. Shifting of brushes in thedirection of rotation for agenerator and in the oppositedirection for motor4. Narrow width for thecommutation bars Select thecorrect answer using thecodes given below: Codes:






 
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