Will asolid metal sphere hold a larger electric charge than a hollow sphere of the same diameter where does the charge reside in esch case?

The charge all resides on the surface of the sphere, whether or not there's

anything inside the surface.

In principle, there's no limit on the amount of charge that can be jammed onto

the sphere. The only limit is a practical one, that is, how much charge you can

move and transfer to the sphere before it starts arcing back to the machinery

or the support that's holding it.