Physics, 26.01.2020 23:31 mota78

Why should you not use emery cloth for polishing the commutator of an appliance motor? a. it wears the surface too much. b. its dust conducts electricity. c. it fails to remove oily, discolored spots. d. its material reacts chemically with copper.

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Why should you not use emery cloth for polishing the commutator of an appliance motor? a. it wears...