An infinite plane of surface charge density +.2uC/m^2 is in the y-z plane at x=0
a) What is the magnitude of the electric field close to the surface
b) What is the potential difference Vb - Va where the point b is at x=0.5m and point a at x=0.2m?
c) How much work is required to be done by an outside agent to move a test charge of qo=1.5uC from point a to point b?