A charged particle is suspended at the centre of two thin concentric spherical charged shells,
Channel: Doubtnut
Date: 26/01/2020

A charged particle is suspended at the centre of two thin concentric spherical charged shells, made of non conducting material. Figure A shows cross section of the arrangement. Figure B gives the net flux `phi` through a Gaussian sphere centered on the particle, as a function of the radius r of the sphere. In which range of the values of r is the electric field zero ?