henry (H) The derived unit of inductance in the SI system of units. One henry is equal to the inductance of a closed circuit in which an electromotive force of one volt is produced when the electric current in the circuit varies uniformly at a rate of one ampere per second. It is named after the American physicist Joseph Henry (1797-1878). Related categories • ELECTRICITY AND MAGNETISM UNITS Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) |