Charge resides on the outside of a conductor.

Charge resides on the outside of a conductor. The large hollow metal sphere is electrostatically charged. (The Wimshurst machine gives a good charge. The electrophorous works less well. See D+10+18-22). 1] Touch the inside of the hollow sphere with the 'proof' sphere mounted on the Teflon handle, then touch the electroscope with the 'proof' sphere. The metal pointer does not move, indicating that no charge resides on the inside of a conductor. 2] Touch the outer surface of the hollow sphere with the small 'proof' sphere. Move the small sphere to touch the top metal plate of the Braun electroscope. The metal pointer will move, indicating that there is charge on the outside of the hollow sphere.