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Electric Charge

The phenomena of two objects sticking together can be explained by the notion that objects when rubbed can gain a net electric charge. There are two types of charge, labeled positive ( + ) and negative ( - ), with the following basic property: Detailed experiments have established the following fundamental characteristics of electric charge: This basic unit of charge is conventionally denoted by e :

e = 1.602 x 10- 19 Coulombs (C) . (1)

In an atom, the charge on an electron is - e and that on a proton is + e .