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September 22, 2014

# Homework Help: Physics!!!

Posted by Help on Friday, January 20, 2012 at 10:46am.

The electric field everywhere on the surface of a charged sphere of radius 0.260 m has a magnitude of 545 N/C and points radially outward from the center of the sphere.
(a) What is the net charge on the sphere?

• Physics!!! - drwls, Friday, January 20, 2012 at 11:03am

Use Gauss' Law.
The total flux is
4*pi*R^3 *E

Gauss' Law tells you how to relate the flux to the total charge.

Flux = Q/epsilon0

epsilon0 = 8.854*10^-12 C^2/(n*m^2)

• typo I think - Damon, Friday, January 20, 2012 at 11:53am

4*pi*R^2 *E

• Physics!!! - drwls, Friday, January 20, 2012 at 12:28pm

Yes, Damon is right. Typo exponent error. Thanks for catching it, DC

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