Electric Charges•Electric force is a force between charges. There are two kinds of charges – positive and negative. Like charges repel and unlike charges attract.•In nature, charges exist in integer multiples of an indivisible amount: 1.6x10-19Coulombs (defined as“e”). •The smallest positive and the smallest negative charges are carried by the protons and the electrons, which are the basic constituents of all matter. –charge of electron = - e–charge of proton =+ e•Charges can neither be created nor destroyed. Charges (electrons) can be transferred. An object can become “charged” if electrons are transferred to or from it (charging by contact).•Inside a conductor, fraction of the electrons can move about freely. –A conductor can be charged by contact or by induction.
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