Short test

A disk of radius R is uniformily charged with a surface distribution .

a-What is the electric field at point M on the z-axis a distance Z from the center of the disk?

b-Deduce the electric field in the case of infinite plane.

c- If we take two plates and power them with opposite charges opposées (one carries negative charges the other carries charges positives), calculate the field which rigns between them.

d- If the two points x₀ and x has a potential V₀ and V respectively. Give the formulas of  V.