(a) If an isolated conducting sphere 8.9 cm in radius has a net charge of 6.8 ?C and if V = 0 at infinity, what is the potential (in V) on the surface of the sphere?
(b) Can this situation actually occur, given that the air around the sphere undergoes electrical breakdown when the field exceeds 3.0 MV/m? 1 = yes 2 = no. Give the number of the correct answer.