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Wheatstone's bridge Wheatstone bridgeThe equation to calculate the unknown resistance when the galvanometer reads 0 is Ru= ( R2/R1 ) Rv.Wheat·stone bridge W5115100 (wēt′stōn′, hwēt′-) also Wheat·stone's bridge (-stōnz′)n. An instrument or a circuit consisting of four resistors or their equivalent in series, used to determine the value of an unknown resistance when the other three resistances are known. [After Sir Charles Wheatstone (1802-1875), British physicist and inventor.]EncyclopediaSeeWheatstone bridge |