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Updated: June 14, 2025
Further, the same instrument, since varying electro-motive force affected the drop of mercury and produced varying displacement, ought also to act as a receiving instrument, and should vibrate in accordance with the currents that arrive.
The electro-motive force of the battery, E', is preferably made about one-third as great as that of the battery, E.
The Resistance therefore acts as a restricting force, limiting the extent to which the power of the original Electro-motive force shall be delivered at the point where the work is to be done, but at the same time no delivery at that point could be effected without it; so the Resistance also has a necessary part to play in the working of the circuit.
Volta himself supposed it to reside in the Contact of different metals. Here was exerted his 'Electro-motive force, which tore the combined electricities asunder and drove them as currents in opposite directions.
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