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

A nonconducting sphere has radius R=2.31 cm and uniformly distributed charge q=+3.50 fC. Take the electric potential at the sphere's center to be V_{0}=0. What isVat radial distance r = 1.45cm?

2. Relevant equations

E= [tex]\frac{kqr}{R^3}[/tex]

[tex]\Delta[/tex]V=-[tex]\int[/tex]E*ds

3. The attempt at a solution

E = [tex]\frac{k(3.5*10^{-15}C)(.0145m)}{(.0231m)^3}[/tex]

E = 3.70*10^{-2}V/m

[tex]\Delta[/tex]V=-[tex]\int[/tex]3.70*10^{-2}V/m * ds

[tex]\Delta[/tex]V=-3.70*10^{-2}V/m * .0145 m

[tex]\Delta[/tex]V = -5.365*10^{-4}

That's not right according to the book. I keep getting double the right answer when I do problems with electric potential and I can't figure out why.

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# Homework Help: Calculating Potential from Field

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