Simple and durable, this Slidewire Wheatstone Bridge consists of a resistance wire with a sliding contact and a strip of aluminum to provide two "arms" of the bridge for known and unknown resistances. This apparatus also allows you to see how the resistance of a conductor varies with its length, diameter and material for an interesting and informative lab experience. The resistance wire is one meter long and is made of 0.5mm-diameter nickel-chromium wire. Strips of heavy aluminum without soldered joints are provided with a single gap in each of two arms for the resistances. You add a galvanometer to show when the circuit is balanced. Includes instructions. Requires a wide range of circuit elements, depending on selected experiments. All components are mounted on a heavy sheet-metal base. Size: 125mm x 1.1m.
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