Help? Read Master Talk to Tutor wints SERCP9 16.P.022 My Notes Ask Your Teacher metal sphere...
PLEASE HELP! The metal sphere of a small Van de Graaff generator illustrated in the following figure has a radius of 20.0 cm. When the electric field at the surface of the sphere reaches 3.0 x io6 V/m, the air breaks down, and the generator discharges. What is the maximum potential the sphere can have before breakdown occurs?