Faraday's voltameter

Numéro d’image : 11648889
Faraday's voltameter
Faraday's voltameter. This is a device invented by Michael Faraday (1791-1867) that is used to measure a quantity of electrical charge. This version,made in 1832,was originally called a 'volta-electrometer'. A silver nitrate solution is placed in the v-shaped tube,covering the two silver electrodes. A current is passed for a known amount of time. The electrodes are weighed before and after the experiment - the amount of silver deposited at the cathode is directly proportional to the total charge that has passed. This object is preserved at the Royal Institution,London
Licence : Droits gérés
Crédit: Science Photo Library / Royal Institution of Great Britain
Taille de l’image : 4905 px × 5740 px
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