A small rubber sphere of diameter 8 cm has a charge of 1.20 x 10-6 C distributed uniformly over its surface. It is placed at the origin of a region of space where the electric field is 80 N/C.
a) What is the net electric field inside the rubber sphere?
b) What is the net electric field at 50 cm on the positive x axis?

Question

A small rubber sphere of diameter 8 cm has a charge of 1.20 x 10-6 C distributed uniformly over its surface. It is placed at the origin of a region of space where the electric field is 80  N/C. 
a) What is the net electric field inside the rubber sphere?
b) What is the net electric field at 50 cm on the positive x axis?

anonymous · Answer

okay so I'm pretty sure that a) is zero because the charge is on the surface so the inside = 0.  is this correct?

jamesj · Answer

Yes, definitely.