Types and applications

摘要

Every conductor exhibits some resistance to the flow of electrical charge (except for superconductors). Georg Ohm discovered the exact relationship between voltage (V), current (I), and resistance (R), formulating the law that bears his name and is learned by every electronics student: V=I x R or I = V/R or R = V/I As electrons flow through a material in response to an electric field, they collide with the atoms that make up the material. The collision transfers some of the electron's energy to the atoms, which vibrate in response.