260 results about "Electromotive force" patented technology

Electromotive force, abbreviated emf (denoted E and measured in volts), is the electrical action produced by a non-electrical source. A device that converts other forms of energy into electrical energy (a "transducer"), such as a battery (converting chemical energy) or generator (converting mechanical energy), provides an emf as its output. Sometimes an analogy to water "pressure" is used to describe electromotive force.