Question 533Electricity & Electronics - QMED

You are correct, the primary purpose of the brushes of DC generators is to conduct armature current to an external load (option A). The brushes in a DC generator make contact with the commutator, which converts the alternating current (AC) generated in the armature windings into direct current (DC) that can be supplied to an external load. The brushes act as the conduit to transfer this DC current from the rotating armature to the stationary external circuit. The other options are incorrect because: B) the field windings, not the brushes, provide the excitation to a DC generator; C) the commutator, not the brushes, neutralizes armature reaction; and D) the brushes do not convert DC to AC, they convert AC to DC.