PHYS 1420 Lecture Notes - Lecture 28: Electric Field

• School: York University
• Department: Physics and Astronomy
• Course: PHYS 1420
• Professor: Matthew George

Document Summary

Conductors: a material in which charges can move easily, generally very good conductors, with some electrons being free to move from nucleus to nucleus. If excess charge is added to a conductor, it spreads out as much as possible (due to coulomb repulsion) Insulator: a material in which charges cannot move freely. In a solid, this means that the electrons and protons are generally locked in place and cannot move. If excess charge is added to an insulator, it stays where it is put. Semiconductors: they are conductors, but not very good ones, there are two types of semiconductors -n and p.