Entry from US English dictionary
An instrument that measures electric current by indicating the strength of repulsion or attraction between the magnetic fields of two sets of coils, one fixed and one movable.
- The electrical inventor and entrepreneur, Werner von Siemens (1816-1892), used this principle in his electrodynamometer, first described in 1880.
- The electrodynamometer is used to measure currents and consists of one fixed coil and one coil that is free to rotate.
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