To achieve sparkless commutation brushes of a D.C. generator are rockedm ahead soas to bring them
A) just ahead of magnetic neutral axis
B) in magnetic neutral axis
C) just behind the magnetic neutral axis
D) none
Correct Answer:
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Q15: The purpose of providing dummy coils in
Q16: If a D.C. generator fails to build
Q17: Flashing the field of D.C. generator means
A)neutralising
Q18: The e.m.f. induced in the armature of
Q19: In a D.C. generator the critical resistance
Q21: Armature coil is short circuited by brushes
Q22: A cumulatively compounded long shunt generator when
Q23: To avoid formation of grooves in the
Q24: The following constitute short-circuit in the armature
Q25: The rapid wear of brushes takes place
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