Questions:

A neutral hollow metal ball is on the end of a glass rod consequently that one can move it around easily without touching the ball. A rubber rod is chafed with rabbit fur. The rubber rod is carry very near the metal ball but not allowed to touch the metal ball. In this preparation the pair is brought near a metal faucet and the ball is touched momentarily to the faucet. The faucet is affixed to a copper pipe which extends deep into the earth. The rods as well as ball are moved away from the faucet and then they are moved farther away from each other. At this end what kinds of charge if any does the ball have?

Feedback:

The rubber rod subsequent to being rubbed by the rabbit fur has a negative charge. When it is brought close to the metal ball the rubber rod repels the negatively charged particles in the ball. The charged particles in the metal ball are free to travel around. We know this for the reason that metal is a conductor. In anticipation of the ball is brought into contact with the faucet however the negative charges repelled by the rod cannot escape the metal ball but once the metal ball is brought into contact with the faucet the negative charges have an escape route. They are ward off right into the earth by the negatively charged rubber rod. Just the once contact with the faucet is lost the negative charge cannot get back into the ball. The ball having lost a few of its negative charge is positive.