Posted by **Brandon** on Friday, January 20, 2012 at 3:14pm.

suppose that resting on your non-conducting desktop is a tiny piece of paper (m=0.08g) that has a charge of 4x10^-10C. You bring your comb 3 cm away from it and the paper jumps up to the comb. Give an approximate value for the charge of the comb. Does the comb carry an excess of electrons or protons? How many?

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