Question

How many electrons would have to be removed from a copper penny to leave it with a positive charge of 10^-7 C ?

Answer 1

Hi there

The charge on one electron is 1.6 * 10^-19 C.
So the number of electrons to be removed is...
= 1.0 * 10^-7/1.6 * 10^-19 C
= 6.25 * 10^ 11. Electrons

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