If a D.C. generator fails to build up the probable cause could not be – McqOptions

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1.	If a D.C. generator fails to build up the probable cause could not be
A.	Imperfect brush contact
B.	Field resistance less than the critical resistance
C.	No residual magnetism in the generator
D.	Faulty shunt connections tending to reduce the residual magnetism
Answer» C. No residual magnetism in the generator

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