A Wheatstone bridge is an electrical instrument used to measure an unknown resistance. It has four resistors—two known, one unknown, and one variable—and a galvanometer. When the bridge is balanced, no current flows through the galvanometer, allowing the unknown resistance to be calculated accurately.
A Wheatstone bridge is an electrical circuit used to measure an unknown electrical resistance by balancing two legs of the bridge circuit. It consists of four resistors—two known, one unknown, and one variable—and a sensitive ammeter (or galvanometer). The bridge is balanced when the variable resistor is adjusted so that no current flows through the ammeter, allowing the unknown resistance to be calculated with high precision using a simple formula.
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