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Ein = (1/4*pi*epsilon0)*(Q/R^3)*r

A) Graph E vs r for 0<r<3R

b) The electric potential Vout outside the sphere is that of a point charge Q. Find an expression for the electric potential Vin at position r inside the sphere.

c)What is the ration Vcentre/Vsurface

d) Graph V vs r for 0<r<3R