Explain briefly why there is a limit to how much charge can be placed on a metal sphere in the classroom. If the radius of the sphere is 15 cm, what is the maximum amount of charge you can place on...

Explain briefly why there is a limit to how much charge can be placed on a metal sphere in the classroom. If the radius of

the sphere is 15 cm, what is the maximum amount of charge you can place on the sphere? (Remember that a uniform

sphere of charge makes an electric field outside the sphere as though all the charge were concentrated at the center of the

sphere.)