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winterwind

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## Homework Statement

If a proton is considered a uniform ball of charge of radius 1.0x10-15m, what is the

electric field just beyond its surface?

## Homework Equations

Gauss's law?

## The Attempt at a Solution

I followed a problem in the book that found an equation for the electric field of a uniformly charged sphere. I treated the proton as a uniform sphere of charge, so that the same equation could be applied.

The equation was E = (1/4piE0)(Q/r^2)

*E0 is constant 8.85 x 10^-12.

So I just plugged in charge of electron and radius r of the proton.

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