1.

The number of electrons that must be removed from an electrically neutral silver dollar to giveit a charge of +2.4 C is(A) 2.5 x 10(B) 15 x 10"(C) 1.5x 10" (D) 25 x 10"

Answer»

The charge of an electron is:q = 1.6x10^-19 C

So, the number of electrons needed is:n = Q/q = (2.4*10^-6 C)/(1.6x10^-19 C) = 1.81x10^13 electrons



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