[Gutenberg 33154] • The Telephone / An Account of the Phenomena of Electricity, Magnetism, and Sound, as Involved in Its Action
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- Authors
- Dolbear, A.E.
- Publisher
- Createspace
- Tags
- telephone
- ISBN
- 9781505579857
- Date
- 2015-03-25T00:00:00+00:00
- Size
- 1.20 MB
- Lang
- en
[...]west; if the current was moving towards the south, the south pole of the magnet was deflected towards the west; and that in all cases the magnet tended to set itself at right angles to the current; also that this angular displacement depended upon the strength of the current. Thus originated the galvanometer, an instrument that not only detects the existence of an electric current, but enables us to determine its direction and its strength. Our present knowledge of electrical laws is due, in a very large measure, to observations made with this instrument.[...].