(n) 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
a. [ Pref. a- not + static. ] (Magnetism) Having little or no tendency to take a fixed or definite position or direction: thus, a suspended magnetic needle, when rendered astatic, loses its polarity, or tendency to point in a given direction. [ 1913 Webster ]
Astatic pair (Magnetism), a pair of magnetic needles so mounted as to be nearly or quite astatic, as in some galvanometers. [ 1913 Webster ]
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