a sphere of radius r has a uniform volume charge density ρ=kr. where r is distance from centre and k is constant. the magnitude of electric field which exists at surface of sphere? E0= permissivity 4pikr4/3E0 kr/3E0 4pikr/E0 kr2/4E0 plss explain..no links! Share with your friends Share 1 Divyanshu Sharma answered this 5 View Full Answer