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"The connexions of all these six coils are such that when a current is passed through the whole of the coils in series, forces of attraction and repulsion are brought into existence which tend to force one movable coil upwards and the other movable coil downwards." —Encyclopedia Britannica, 1910

Connexions of Kelvin Ampere Balance

"The connexions of all these six coils are such that when a current is passed through the whole of the…