Charge 􀀓 is applied to a circular disk of ebonite of radius 􀀔 by rubbing it while it is rotating. Inthis way the surface charge density becomes proportional to the radial distance from thecenter. Show that the electric field strength on the axis of the disk at an axial distance ℎ fromthe center is 􀀖􀀗􀀘􀀙􀀌􀀚􀀛􀀜􀀝 􀀞􀀟􀀠 􀀜􀀡√􀀜􀀣􀀡􀀘􀀣􀀘 − 􀀥√􀀜􀀣􀀡􀀘􀀣􀀦 􀀧􀀨.

Mihindu Jayasinghe , 7 Years ago

Grade 12th pass