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I already know that a charged polyethylene plastic (done by rubbing it with paper) can be used to attract a cardboard. Now, can I 'charge' the cardboard by touching it with the plastic? Supposedly, the cardboard gets the same charge as the plastic, it would repel the plastic after I charge the plastic again and try to make contact with it.

Of course this is all hypothetical; I've actually tried it already and it doesn't work, thus I concluded that the cardboard cannot be charged this way. Probably because it is not a conductor.

Anyway, my question is, is there some scenario that the opposite happens and the cardboard gets the same charge as the plastic?

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If you made the cardboard conducting. Maybe if it's wet. Maybe if you rub the plastic hard on the cardboard (although this usually requires the right type of momentary bonds). This is too open ended--- the "some scenario" is vague. Are you asking "how can I transfer charge from plastic to cardboard efficiently?"? – Ron Maimon Jul 26 '12 at 4:09
Yes, that's what I want to know. – Dystopian Jul 26 '12 at 6:20

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