Which device changes the alternating e.m.f. generated by the D.C. Gene – McqOptions

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1.	Which device changes the alternating e.m.f. generated by the D.C. Generator in its armature coil to D.C.?
A.	Slip ring
B.	Rectifier
C.	Commutator
D.	None of these
Answer» D. None of these

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