please help mee, I have an exam tomorrow(adsbygoogle = window.adsbygoogle || []).push({});

1) Two long,thin cylindirical shells of radii r1 and r2,respectively,are oriented coaxially (one cylindwer is centered inside the other).The cylinders carry equal and opposite linear charge densities lambda ,describe the resulting electric field inside the smaller cylinder ,btween the cylinders,and outside the larger cylinder.

2)Two large ,thin metallic plates are placed parallel to each other ,seperated by 11 cm.The top plate carries a uniform charge density of 6.5*10(-6).While the bottom plate carries a uniform charge density of -4.8*10(-6)C.What is the electric field halfway btw plates?

an the last one

3)A solid sphere of radius R has uniform charge density p(rho).Calculate the total potential energy by calculating the energy required to bring a spherical shell of thickness dr and charge density p(rho) from infinity to a distance r from the sphere's center in the potential due to a uniformly charged sphere of radius r.

ı didnt understand especially the last one.do we use rho in the shell??

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# Homework Help: Some problems(electric field.electric potential)

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