Faraday had shown that electromotive force depends on chemical affinity.
The quantity ½Ir2w is the electromotive force due to the disk.
Helmholtz takes the case of a circuit of resistance R in which acts an electromotive force due to a battery or thermopile.
The electromotive force of one cell of a Daniell battery is about one volt.
The electromotive force of this secondary current is somewhat higher than is necessary.
The electromotive force of this cell when new is about 1.47 volts.
Its electromotive force is nearly two volts, but it has the objection of giving off disagreeable nitrous fumes.
What may be said of the electromotive force during the second half of the revolution?
There is, therefore, actual reduction in the electromotive force of the cell, as well as an increase in internal resistance.
Its magnetic field is obtained from permanent magnets, hence the electromotive force generated is comparatively small.
electromotive force e·lec·tro·mo·tive force (ĭ-lěk'trō-mō'tĭv)
The energy per unit charge that is reversibly converted from chemical or other forms of energy into electrical energy in a battery.
|electromotive force |
Electric potential or voltage. Electromotive force is not really a force, but a measure of how much work would be done by moving an electric charge.