The material for commutator brushes is generally

Related MCQs

• In D.C. generators, the brushes on commutator remain in contact with conductors which
• The number of brushes in a commutator depends on
• If brushes of a D.C. generator are moved in order to bring these brushes in magnetic neutral axis, there will be
• The insulating material used between the commutator segments is normally
• Sparking at the commutator of a D.C. motor may result in
• The commutator segments are connected to the armature conductors by means of
• In a commutator
• In case of D.C. machine winding, number of commutator segments is equal to
• To avoid formation of grooves in the commutator of a D.C. machine
• For both lap and wave windings, there are as many commutator bars as the numberof