A negatively-charged rod is brought close to (but does not touch) two neutral conducting spheres that are in contact with each other but insulated from the ground. If the rod is removed and two spheres are then separated, what kind of charge will be on the spheres?
Both spheres become negative
Both spheres are neutral
The sphere near the charged rod becomes negative and the other one becomes positive.
Both spheres become positive
The sphere near the charged rod becomes positive and the other one becomes negative.