lionel messi.
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1. Homework Statement :
the excess(equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10^-19N, is...?
3. The Attempt at a Solution :
since,
f=kq^2/r^2.
ive calculated q from here which is 1x10^-16N..
then used,
q=ne..
from here n becomes 625 electrons. but answer in my book is 25 electrons.can someone point out my mistake?
the excess(equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10^-19N, is...?
3. The Attempt at a Solution :
since,
f=kq^2/r^2.
ive calculated q from here which is 1x10^-16N..
then used,
q=ne..
from here n becomes 625 electrons. but answer in my book is 25 electrons.can someone point out my mistake?