astatic coils
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| Noun | 1. | astatic coils - 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 astatic galvanometer - has a moving magnet and astatic coils arranged to cancel the effect of the Earth's magnetic field coil - reactor consisting of a spiral of insulated wire that introduces inductance into a circuit |
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