electromagnetismelectrons
So a positive/negative charge can attract a neutral object by causing the negative/positive charges to move closer to the source.
However, if you have a neutral object and another neutral object placed next to each other, can't, for example, all the electrons on the left neutral object move to one side, and similarly with the other neutral object so that the two objects become charged?
For example +- -+ —> +- +-
Short answer:Finite size of dust particles and inverse square law.
The side of the dust particle towards the screen is negatively charged and the other side is positively charged.Now due to the inverse square law,the force of attraction is more than than the repulsion as the negative side is closer and the particle experiences a net force towards the screen.
Why the electrons don't travel to the screen?
Because they still tightly held by the atoms of the dust particle.The T.V. screen only induced a slight polarization of the dust particle.The electrons have not travelled to the negative side(unlike conductors) but the atom itself undergoes slight polarization.(Similar to what happens in dielectrics).
The ground is connected to every point of the metal plate by the metal wire and the metal plate.
I mean, there is a metal wire that connects the ground to the plate, and then there is the metal plate that connects every point on the metal plate to each other, therefore every part of the metal plate is equally connected to the ground.
When you touch the plate with the grounded wire, electrons move to some direction through the wire. As every point on the metal plate has exactly the same voltage, it does not make any difference what part of the plate you touch with the wire.
Best Answer
Yes, this happens and it's called London Dispersion force.