A carbon brush is a sliding contact used to transmit electrical current from a static to a rotating part in a motor or generator, and, as regards DC machines, ensuring a spark-free commutation.
103) Carbon brushes are used in DC electric motors to
Answer is:
prevent sparking during commutation
Explanation:
Related RRB JE Mechanical Question Paper 2014 (Set-3) with Answer Key
Answer is:
Graphite
Explanation:
Lead pencils contain graphite (a form of carbon), not lead. In fact, contrary to what many people believe, lead pencils never were made with lead.
Answer is: