Question

whats the material used to make a slip ring

Answer 1

A slip ring is an electrical connector designed to carry current or signals from a stationary wire into a rotating device. Typically, it consists of a stationary graphite or metal contact (brush) which rubs on the outside diameter of a rotating metal ring. As the metal ring turns, the electrical current or signal is conducted through the stationary brush to the metal ring making the connection. Additional ring/brush assemblies are stacked along the rotating axis if more than one electrical circuit is needed. Either the brushes or the rings are stationary and the other component rotates. This simple design has been used for decades as a rudimentary method of passing current into a rotating device.

Answer 2

HOPE THAT HELPED YOU

Answer 3

Please post the question in the right group (subject). For this question, please post it in the Physics group, thank you.
Link to Physics group:
http://openstudy.com/study#/groups/physics