astatic : Idioms & Phrases
astatic coils
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noun an arrangement of coils used in sensitive electrical instruments; the coils are arranged to give zero resultant external magnetic field when a current passes through them and to have zero electromotive force induced in them by an external magnetic field
WordNet
astatic galvanometer
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noun has a moving magnet and astatic coils arranged to cancel the effect of the Earth's magnetic field
WordNet
Astatic pair
(Magnetism) , a pair of magnetic needles so mounted as to be nearly or quite astatic, as in some galvanometers.
