PHYA22H3 Chapter 26: PHYA22 Chapter 26.doc

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12 Mar 2012
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PHYA22H3 Full Course Notes
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Insulators: those materials on or in which charges remain immobile (glass and plastic): both insulators and conductors can be charged; they differ in the mobility of, charged objects are attracted to neutral objects also. charge. Charge: a glass rod that has been rubbed with silk is positively charged, a plastic rod rubbed with wool is negative. Electrons and protons are the basic charges of ordinary matter. protons and electrons contained in the object. discrete steps, not continuously: objects acquire positive charge not by gaining protons, but by losing electrons. Ionization: the process of removing an electron from the electron cloud of an atom. A neutral object should show no charges: conserve charge from one diagram to the next if you use a series of diagrams. Electrostratic equilibrium: charges in an isolated conductor are in static equilibrium so the charges are at rest and there is no net force on any charge. Polarization force: the net force toward the charged rod.

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