Commutator brushes are made up of carbon.
Description : What causes sparking between the brushes and the commutator?
Last Answer : Improper commutation.
Description : The current from the stator of an alternator is taken out to the external load circuit through (A) slip rings. (B) commutator segments. (C) solid connections. (D) carbon brushes.
Last Answer : (C) solid connections.
Description : _____ brushes are fragile and cause excessive wear of commutator, (a) Natural graphite (b) Hard carbon (c) Electro graphitic (d) Metal graphite
Last Answer : (a) Natural graphite
Description : The material for commutator brushes is generally (a) mica (b) copper (c) cast iron (d) carbon
Last Answer : Ans: d
Description : Which of the following are the parts of a DC generator that convert the AC in the armature to DC in the external circuit. Are these parts the: w) field poles x) slip rings and the brushes y) commutator and the brushes z) armature and the core
Last Answer : ANSWER: Y -- COMMUTATOR AND THE BRUSHES
Last Answer : The number of brushes in a commutator depends on amount of current to be collected.
Last Answer : In D.C. generators, the brushes on commutator remain in contact with conductors which lie under interpolar region.
Last Answer : The material for commutator brushes is generally carbon.
Description : Brushes of D.C. machines are made of (a) carbon (b) soft copper (c) hard copper (d) all of above
Last Answer : Ans: a
Description : What are camel haired brushes made of
Last Answer : Squirrels tails
Last Answer : Brushes of D.C. machines are made of carbon.