A Disk with a Uniform Positive Surface Charge Density Lies

Multiple Choice

A disk with a uniform positive surface charge density lies in the x-y plane, centered on the origin.Along the positive z axis, the direction of the electric field is:

A) in the +z direction
B) in the -z direction
C) in the +x direction
D) in the +y direction
E) there is no field along the positive z axis