Sphere A carries a net charge and sphere B is neutral. They are placed near each other on an insulated table. Which statement best describes the electrostatic force between them?
1) there is no force between them since one is neutral
2) there is a force of repulsion between them
3) there is a force of attraction between them
4) the force is attractive if A is charged positively and repulsive if A is charged negatively
5) the force is repulsive if A is charge positively and attractive if A is charged negatively