Answer to Question #229 in Electricity and Magnetism for mukta begum

Question

A solid metallic sphere of radius a carries total charge Q. No other charges are nearby. The electric field just outside its surface is kQ/a^2 radially outward. At this close point the uniformly charged surface of the sphere looks exactly like a uniform flat sheet of charge.Is the electric field here given by σ/ε or σ/2ε?

Answer 1

You should write σ/ε in this case.