conductor
Category : physics
Product Detail
A conductor is an object or material that permits the free and easy movement of electric charge through it, owing to the presence of numerous mobile charge carriers, typically delocalized or "free" electrons in metals. In the context of electrostatic equilibrium—a state where charges are stationary and there is no net flow of current—a conductor exhibits several fundamental properties: first, the electric field is zero everywhere inside the conductor as any initial field would instantly cause the free charges to redistribute until they perfectly cancel the external field; second, any excess charge resides entirely on the outer surface of the conductor, a consequence of Gauss's Law and the internal zero field; third, the entire conductor, including its surface and any internal cavity (if uncharged), must be an equipotential volume, meaning the electric potential (V) is constant throughout; and finally, the electric field lines just outside the surface are always perpendicular to the surface, as any parallel component would induce charge movement and violate the condition of equilibrium. Common examples of conductors include metals like copper, silver, and aluminum, as well as graphite, salt water, and the human body.
