(a) Two insulated charged copper spheres...

(a) Two insulated charged copper spheres a and b have their centres separated by a distance of 50 cm what is the nutual force of electrostatic repulsion if the charge on each is `6.5 xx10^(-7)` c the radii of a and b negligible compared to the distance of separation
(b) what is the force of repuslion if each spere is charged double the above amount andf the distance between them is haved

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(a) `1.5 xx10^(2)` N
(b) 0.24 N

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