
To explain: The condition of copper rod when it is rubbed with wool.

Answer to Problem 7SSC
Copper remains neutral
Explanation of Solution
Introduction:
Insulating materials becomes charged by rubbing against each other. This is called charging by friction. While rubbing these materials, the electrons (negatively charged) are rubbed off from one material and move in to another material. The material which lost its electrons becomes positively charged and the material which gains electrons becomes negatively charged.
Copper is a
Chapter 20 Solutions
Glencoe Physics: Principles and Problems, Student Edition
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