Two identical metallic sphere having a positive
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Let the initial charges be q1 and q2 respectively.
After they come in contact, the charges are rearranged search that they acquire same charge.
latest say that a charge on each of them is q.
They are again brought apart at a distance of 0.9m.Hence,the force between them will be given as
F=KQ^2/r^2
0.025=(9×10^9×Q^2)/0.9^2
Q^2=0.025×0.9^2/9×10 ^9
Q=1.5×10^-6 C
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