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lec01 - • Inside an insulator electrons are bound to...

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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 -19 Coulombs (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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