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Definition of: Wheatstone bridge
(hwēt′stōn) Electr.
An instrument for the measurement of differential resistance in an electric current. Also Wheatstone's bridge. [after Sir Charles Wheat-stone]
a. Galvanometer.
b. Battery.
c, d. Bridge.
R1, R2 Resistances to be compared.
R3, R4 Known resistances which can be varied. When galvanometer shows no current, R1R4 = R2R3.
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