Two balls of equal mass and equal charge are hung from a fixed support by threads of…

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

Two balls of equal mass and equal charge are hung from a fixed support by threads of length

l

. At electrostatic equilibrium, assuming the angles made by each thread are small, the separation

x

between the balls is proportional to: (1)

l

(2)

l^2

(3)

l^{2/3}

(4)

l^{1/3}