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Old May 17th 2009, 12:22 PM   #1
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Potential (check my error)

A charge $\displaystyle +10^{-8}C$ uniformly distributed on a spheric shell with 12 cm radius. (a) What is the intensity of the electric field in the positions immediately to the external and internal shell? (b) What is the intensity of the electric potential in the positions immediately to the external and internal shell ? (c) What is the potential at the center of spheric, which the field at that point?

My solution
a)
internal E = 0
external $\displaystyle E = \frac{kq}{r^2} = 6250 N/C$

b) internal = external = $\displaystyle E = \frac{kq}{r} = 750 V$

c) Potential is the same across the region

d) E = 0 (r = 0)

The asnwer
a) internal E=0
external E = 6,25x10^{-15} N/C

b) V = 0,75x10^{-15}V

c) and d) Not have answer. My solution is correct ?
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Old May 17th 2009, 12:30 PM   #2
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According to the information provided in the question, your answers are correct.
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Old May 17th 2009, 12:34 PM   #3
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Originally Posted by Parvez View Post
According to the information provided in the question, your answers are correct.
Ok. Thank you
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