Question

Two small spheres, each having a mass of 20 g, are suspended form a common point by two insulating strings of length 40 cm each. The spheres are identically charged and the speration between the balls at equilibrium is found to be 4 cm . Find the charge on each sphere.

Answer 1

hey mate the charge on each ball is 41.7nc..........✌✌

Answer 2

Explanation:

Tcosθ=mg

Tsinθ=Fe

tanθ= mg

Fe

∵ Fe= r^2

Kq ^2

Fe= (2d)^2

Kq^2

Fe= 4.l ^2 sin^2θ

Kq^2

∴ tanθ= 4l^2 sin^2

= (4l ^2 sin 2 θmg)4πϵ 0

q ^2

q ^2 =(4mgl^2, sin^2 θtanθ)4πϵ ^0