Find electric field outside and inside of a solid sphere

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1) Find electric field outside and inside of a solid sphere having charge density s and radius R. 

2) Find the electric field due to the disc along an axis which passes through its center and perpendicular to the surface of the disc at a distance r. The disc has a surface charge density ? and radius R. 

3) Find the potential also in the above problems. 

Reference no: EM131511593

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