physics help!?

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how could you find out which strip of tape, the one pulled off the desk or the one pulled off the back of the other tape, is positively charged?

2007-02-05 07:52:17 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Physics

2 answers

Ignore what the other answer said about magnets. No relation to electric charge. Otherwise, that approach is about the only way. How do you know? Look up what happens when you rub rubber with silk.

2007-02-05 08:45:10 · answer #1 · answered by sojsail 7 · 0⤊ 0⤋

Find a negatively charged magnet, or something you know to be negatively charged. Then 1 at a time, hold the tape by it. The one that is positively charged will be drawn to the magnet, while the negatively charged tape will be repelled (or at the least stay where you're holding it).

2007-02-05 16:16:05 · answer #2 · answered by Woot 3 · 0⤊ 0⤋