Question
Thu May 12, 2011 By: Rohan Mehra

When we rub glass rod with silk why does glass gets charged.Does the electrons get transfered from glass rod to silk?If yes then how can the electrions be transferred from glass rod to silk as glass rod is an insulator.

Expert Reply
Fri May 13, 2011
When an object is charged by rubbing it against another object,transfer of charges take place i.e. electrons get transfered from glass rod to silk. The two objects get oppositely charged. By convention, it is considered that the charged acquired by the glass rod is positive and charged acquired by the cloth is negative. Therefore, the rod becomes positively charged and the cloth becomes negatively charged.
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