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Introduction

Electricity of Class 6

INTRODUCTION 

Source of all electricity is charge. It is measured in coulombs.

Electrically charged objects have several important characteristics:

  1. Like charges repel one another; that is, positive repels positive and negative repels negative.
  2. Unlike charges attract each another; that is, positive attracts negative.
  3. Charge is conserved.

A neutral object has no net charge. If the plastic rod and fur are initially neutral, when the rod becomes charged by the fur, a negative charge is transferred from the fur to the rod. The net negative charge on the rod is equal to the net positive charge on the fur. Charged particles such as electrons are present in all substances, but they do not flow on their own. For flow of charge there has to be a potential difference.

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