The spherical dome of a Van de Graaff generator can be raised to a maximum potential of

Question:

The spherical dome of a Van de Graaff generator can be raised to a maximum potential of 600 kV; then additional charge leaks off in sparks, by producing dielectric breakdown of the surrounding dry air, as shown in Figure P25.51. Determine
(a) The charge on the dome and
(b) The radius of the dome.