Electric charge on the earth's surface and in the earth's atmosphere produces an electric field, which on a clear day is directed vertically downward and has a magnitude of about 100 N/C just above the earth's surface. very small negative particles can be supported by the field. for larg particles, the charge that must be carried may be so great that the field around the charge cuases the surrounding air to conduct the charge away. this occurs at field of about 3.0 * 10^6 N/C in dry air. find the radius of the largest water drop that could be supported in the earth's electrostatic field. assum that the drop is spherical.