Answer Happy

Initially, a metal rod is neutral. It came into contact, with a conductor that has a positive charge. Insulating threads are used to suspend two balls, A and B. When the rod was placed hear each ball, it was discovered that ball A was drawn to it, whilst ball B was repelled by it. What conclusim can be drawn from this a A is negative, B is positive b. B is positive c. B is negative d. A is neutral, Bis positive