Homework Answers
here,
number of electrons , n = 1 billion = 10^9 electrons
the charge on each sphere , q = 10^9 * 1.6 * 10^-19 C
q = 1.6 * 10^-10 C
the charge on each sphere is - (1.6 * 10^-10 C) and (1.6 * 10^-10 C)
the force between them , F = k * q^2 /r^2
F = 9* 10^9 * (1.6 * 10^-10)^2 /(3^2)
F = 2.56 * 10^-11 N
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