Mechanics / Electrodynamics
December 12, 2014
Electric current, electronic gas, electric potential, force of current, tension, electric resistance, electrons’ energy, metal conductor, Law of Ohm, First Law of Joule
Electric current in metal conductor flows by means of the existent therein electronic gas characteristic by chaotic movement of electrons. Kinetic energy of the chaotic movement of electrons in a point of space makes the electric potential of the point. In a conductor, in which different places there appear electric potentials of different values there establishes a transport (diffusion) of the electrons’ energies from places with higher potentials to those with lower ones until the full equalizing of the electrons’ energies. Differences between electric potentials of different points of a conductor are electric tensions between the points. The force of electric current flowing between two points of a conductor is an amount of electrons’ energy that flows between the points for a unit of time. Electric resistance of a conductor is the ratio between the amounts of thermal energy generated in the conductor for a unit of time to the full electric energy entered the conductor for the same unit of time.