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Homework Help: Charging a metal by friction

  1. Jun 3, 2010 #1
    Imagine you have a rod half of which is made of copper and the other half is made of polythene (insulator).

    If the rod is held from the insulating part (and so it's not earthed) and the copper part is rubbed vigorously with a very dry cloth, will it be charged or not?

    In short I want to know whether in an ideal dry environment, whether it is possible or not to charge a well insulated metal by friction.
    Last edited: Jun 3, 2010
  2. jcsd
  3. May 24, 2011 #2
    There is a weak possibility of getting a metal charged by friction as, a pure conductor, such as copper, has a rigid molecular construction that will not permit its electrons to be moved about freely in contrast to insulators that get charged with the slightest friction heat or pressure as it is extremely easy to disrupt their molecular construction.
    In short it's extremely not easy to charge a metal by friction .
  4. May 24, 2011 #3
    isnt it opposite of that?

    conductors have free electrons (so that they conduct obviously !!!) which are easy to be taken away ... so friction will result in charging the rod
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