Assignment:
Question 1. The electric field just above the surface of the charged drum of photocopying machine has a magnitude E of 2.3X10^5 N/C. What is the surface charge density on the drum, assuming the drum is conductor?
Question 2. A charge of uniform linear density 2.0nC/m is distributed along a long thin nonconducting rod. The rod is coaxial with a long conducting cylindrical shell (inner radius=5.0cm, outer radius=10cm) The net charge on the shell is zero.
(a) What is the magnitude of the electric field 15 cm from the axis of the shell?
(b) What is the surface charge density on the inner and outer surface of the shell?