A negatively charged rod is brought near a suspended metal sphere. The sphere is 'grounded' by touching it with a finger. The finger and the rod are now removed. What charge will be on the sphere, positive or negative? Explain what happens. Initially I thought that the finger would remove any induced charge that the sphere took on from the rod, but now I'm questioning that position. Can someone explain to me whether I'm wrong, and if so, how things really work? Thanks.