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Conductors, insulators and induces charges

Conductors, insulators and induces charges. Conductors, insulators . We show experimentally that there are : materials which allow to move charge from one region to another . Conductors. Materials which don’t allow to move charge from one region to another . Insulators. Experiment : .

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Conductors, insulators and induces charges

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  1. Conductors, insulators and induces charges Conductors, insulators We show experimentally that there are : materials which allow to move charge from one region to another Conductors Materials which don’t allow to move charge from one region to another Insulators Experiment :

  2. e.g. Li+ An intuitive reason why metals are good conductors e- SEA OF MOBILE VALENCE ELECTRONS In semiconductors and insulators electrons are localized in directed chemical bonds

  3. Induced charges Let’s consider two distinct ways to charge a metal sphere: 1) Using conduction - - - - - - - - - - - 2) Using Induction + - + - - - - + - - - - + - - - + - - - -

  4. Induction of charge explains a couple of observations Lets reconsider the amber and paper piece experiment + -F F Pair of forces according to Newton’s third law - - - - - - + - - - + + -

  5. Clicker question Two identical conducting spheres have charges of 2µC and 3µC 2µC 3µC They are brought into contact without charge leaking out into the environment If the spheres are then separated again, the distribution of charge on the spheres will be: 1) 3µC 2µC 2) 2.5µC 2.5µC 3) 0µC 5µC 4) 5µC 5µC

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