February 25, 2017

Homework Help: physics

Posted by J on Sunday, January 27, 2008 at 6:27pm.

(a) How many excess electrons must be distributed uniformly within the volume of an isolated plastic sphere 30.0 cm in diameter to produce an electric field of 1150 N/C just outside the surface of the sphere?
(b) what is the electric field at a point 10.0 cm outside the surface?

ok would I use Guass's law for this one? I am lost... and with the 10 cm..where do I put that in the problem?

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