PHYS 154 Lecture 3: Physics 154-Chapter 18
13 Jun 2016
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Electric charge: 1. 6e-19c q=ne q= charge of magnitude (c: 2 charged objects & the electric force. Usually electrons are transferred, & the body that gains electrons aquires an excess of negative charge. Body that lose e- has excess of positive charge. Ebonite (hard, rubber: rubber against fur- some e- from atoms of the fur are transferred to the rod, ebonites-> neg charge fur= pos charge. Glass rod w/ silk: e- go to silk, silk is neg charged & rod is pos charged. During any process, net electric charge of an isolated system remains constant ( conserved: like charges repel & unlike charges attract each other. Electric force (electrostatic force)-> can alter the motion of an object: f=ma. Electrical insulators- poor electric charge: rubber, plastics, wood. Free e- are able to move readily away from neg end to pos end: good conductor= readily.
