Two small balls, each having equal positive charge `Q` are suspended by two insulationg strings of equal length `l` from a hook fixed to a stand. It mass of each ball `=m` and total angle between the two strings is `60^(@)`m, then find the charge on each ball.

Explanation

`T sin theta=(Ktheta^(2))/(4l^(2)sin^(2)theta)`
`Tcos theta=mg`
`tan theta=(Ktheta^(2))/(4l^(2)sin^(2)theta.mg`
`theta=sqrt((4l^(2)sin^(2)theta.tan theta)/K)`