1. The problem statement, all variables and given/known data A small sphere of mass m carries a charge of q. It hangs from a silk thread which makes an angle θ with a large charged non-conducting sheet. Calculate the surface charge density on the sheet. 2. Relevant equations ∫E.ds 3. The attempt at a solution I found E of the sheet to be E = σA/ε how do i find find σ, surface charge density for this problem what is the relationship between E of the sphere and E of the sheet?