Can a electrically-charge object attract uncharged object?

Answer 1

Yes, and in fact they do. You can easily see this yourself by rubbing a balloon on a sweater and then "sticking" it to a wall.

This happens because of something called "induced dipoles".

Let's say you have an electrically charged object ... negatively charged, for example.

If you bring it near an uncharged object, what happens is that the electrons in the molecules of the uncharged object tend to be repelled by the charged object. They move as far to the opposite side as they can get.

Because the electromagnetic force gets smaller with distance, the uncharged molecules now have a slight net attraction to the charged object, since the part of the molecule that's attracted to the charged object is now closer to the charged object than the part of the molecule that's repelled by it. This means the attractive force is very slightly greater than the repulsive force. For any individual molecule, it's not much, but there are a LOT of molecules in any object large enough to see, and those tiny attractions add up.

Answer 2

Yes. In principle, there is no force between an electrical charge and an electrically neutral object. However, the electric charge can induce a separation of charges in the neutral object. This will cause a net electric force, due to the different distances.

Answer 3

No, opposites attract, like a positive charge and a negative charge. Two positive charges will repulse each other.

Answer 4

yes it is same as magnet cause induction in simple coil