(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A charged isolated metal sphere of diameter 10cm has a potential of 8000V relative to V=0 at infinity. Calculate the energy density in the electric field near the surface of the sphere

2. Relevant equations

u=1/2[tex]\(epsilon x E^2)

E=kq/r^2

3. The attempt at a solution

I have tried this like an example given in my book, which gives the q value, but since q=CV, cant i find C of the sphere, solve for q, put that into E, and subsequently solve for u? The answer in my book is .11 J/m^3, but when i use the above strategy, I get around .028. Could someone point me in the right direction?

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# Homework Help: Energy Density in the Electric Field of a Charged Sphere

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