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Derive the expression for the magnitude of the electric field E(r), for between 0 and infinity. Note that r = 0 is the origin of the spherical reference system, as shown in Figure Q1. Hence or otherwise, derive the expression for the scalar potential V (r),for r between 0 and infinity Give a qualitative graphical representation for the functions E(r)(magnitude of the electric field) and V(r) (scalar potential), considering R = 30em, R2 = 50 cm, R3Use the appropriate units on the graphs. Write the values of the electric field in the dielectric side of the interface for each of the metallic= 80 cm, and Q = 800 x 10-12 C.surfaces. Write the values for the potential at r = 0, r = R1, r = R2,and r = Briefly describe what happens to the scalar potential and electric field in the region with R1

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