Two insulated charged copper spheres A and B have their centres separated by a distance of 50 cm. what is the mutual force of electrostatic repulsion? If the charge on each is ` 6 xx 10^(-7) ` C and the radii of A and B are negligible compared to the distance of separation ?

Explanation

Here , ` q_1 = q_2 = 6.5 xx 10 ^(-7) C, r = 50 cm = 0.5 m `
` therefore ` Electrostatic force of repulsion
` F = (1)/(4pi in _0) (q_1q_2)/(r^(2))`
` = (9 xx 10 ^(9) xx (6.5 xx 10 ^(-7))^(2))/((0.5)^(2))`
` F = 1.521 xx 10 ^(-2) N`