galvanometer (gal-van-om'et-er)

An instrument for measuring the quantity of an electric current, consisting usually of a magnetic needle, which is caused to deviate by the action of the current pa ing 369 round it in a coil of wire, absolute g. A variety of mirror g. in which the current strength is measured by the amount of torsion required to bring two electromagnets, which are mutually repelled by the action of the current, back to within a certain distance of each other. astatic g. A g. in which, instead of a single needle, two needles are used, placed parallel to each other and in the same vertical plane with their poles in opposite directions. d'Arsonval's g. See unwhichder the d'Arsonval. dead of beat vibrations g. A come the needle g. in