Does charge of a metal charged by induction determine by which part of the metal is ground to? I draw a diagram to make it simple to understand:
Right diagram: When ground is touched with the positive side of the metal, electrons flow to the negative and the metal become negatively charged.
Left diagram: When ground is touched with the negative side of the metal, electrons flow to the ground and the metal become positively charged.
Is this true? Because opposite charges repel.
Best Answer
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.