CC asked in 科學及數學其他 - 科學 · 1 decade ago

after rubbing a polythene strip, how come it is -ve charged?

after rubbing a polythene strip, how come it is negatively charged?

when rubbing an object, the electrons are rubbed away, and so it should be negatively charged,,,,,,,,,,, is this wrong?

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  • 1 decade ago
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    electrons are rubbed away, but the point is tht, they are rubbed away from which object to which object. in ur case, electrons are rubbed away from ur hands (or ur things in hand) to the polythene strip.

    p.s. different materials have diff kind of charge got when being rubbed. btw, it doesn't matter for whether it's negative or positive charged, it still attracts uncharged objects.

    Source(s): textbook: physics at work
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