Consider sphere of diamer 1.0 cm. It has a total charge of Q=-5uC. (note: u = mu)
a) how many excess electrons make up this charge?
b) If the sphere is a non-conducting material, and assuming a uniform charge density, use Gauss' Law to find the electric field at R = 1.0 cm.
c) if the sphere is a conductor, use Gauss' law to find the electric field at R=0.25cm and R= 1.0 cm
d) use your answers and your knowlege of the properties of non-conductors and conductors to plot the E-field as a function of R ( from 0 to 2R)