Physics Electric Charge

Charging by Conduction

Charging by conduction is a charge that involves a contact between a charge objects with a neutral object.

When the negative charges get in contact with the neutral charges. For example; when negative charges steel stick will get in contact with the neutral charge iron plate, the electron in the steel stick will move to the iron plate neutral zone area. It’s because electron repel each other or in other word the electrons are trying to stay as far as possible from the other electrons. So when there is a neutral charge area inside the iron plate the electrons will immediately move to the neutral charge area make the iron plate become negative charge due to number of negative charge exceeding the number of positive charges.

example of animation: http://education.uoit.ca/lordec/ID_LORDEC/electroscope/

*click the option students and choose charging by induction

There also conduction for positive charge, even though the process is a bit different. For example there is positive charge steel ruler and a neutral charge iron plate. When both of them get in contact or touching each other, the proton in the ruler will start to attract the electrons in the plate. It’s because proton cannot move like electron but can attract the electrons to proton itself. It also decreases the number of electron on the plate making it a positive charge plate, due to the number of electrons has been decrease making it less than the proton.