What is the force of repulsion if each sphere is charged double the above amount shown in figure and the distance between them is halved?

Explanation

Given, `q'_(A)=2q_(A), q'_(B)=2q_(B), r'=r/2`
Force `F'=1/(4pi epsi_(0))(q'_(A)q'_(B))/((r')^(2))`
`=1/(4pi epsi_(0)) ((2Q_(A))(2Q_(B)))/((r/2)^(2))=16 1/(4pi epsi_(0)) (Q_(A) Q_(B))/r^(2)`
`=16F=16xx1.521xx10^(-2)`
`:. F'=0.24 N`
this force is also repulsive in nature because both the charges are similar (positive) in nature.