Terms for Batteries Electromotive force (emf) Definition:is the electrical intensity or "pressure" developed by a source of electrical energy such as a battery or generator. A device that converts other forms of energy into electrical energy (a "battery")provides an emf as its output. ● In batteries,the emf is calculated by:the Standard Electrode Potential(SEP)of the cathode minus that of the anode. 99 Terms for Batteries • Electromotive force (emf) • Definition: is the electrical intensity or "pressure" developed by a source of electrical energy such as a battery or generator. • A device that converts other forms of energy into electrical energy (a “battery") provides an emf as its output. • In batteries, the emf is calculated by: the Standard Electrode Potential (SEP) of the cathode minus that of the anode