Physics 201 Introduction to Electricity & Magnetism 

September 23 Electrostatic Potentials  



Gauss'
Law finding the electric field from a symmetric charge distribution
Last time we talked about the procedure
one uses to find the elctric field via Gauss' Law.
(2417P) A very long, thin wire has a uniform linear
charge density of 50 mC/m. What is the electric field at a distance
2.0cm from the wire?
(2419P) A charge of 30mC
is distributed uniformly throughout a spherical volume of radius 10cm.
Determine the electric field due to this charge at a distance of a) 2.0cm
and c) 20.0 from the center of the sphere. (Yes, we're skipping part
b.)


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