Motor Brush Wear
Why does the brush on the positive pole on slip rings of
machines wear out more than the negative brush?
I have searched the web for some information on this question, but found
nothing. In my minor experience, I have never noticed this effect. How did
you learn of this effect?? I would appreciate hearing from you.
Best, Dick Plano,
Professor of Physics emeritus, Rutgers University
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Update: June 2012