The electric field just above the earth’s surface is 120 NIC,directed dowmward Whatis sue t density…

The electric field just above the earth’s surface is 120 NIC,directed dowmward Whatis sue t density (both sign and magnitude) on the surface of the earth? Assume that the curth is a perfect condasctor. The following constants for the earth may or may not be needed: m-5.98 x l0 kg.r-637×10 m.