physicslab - the heathkit resistance substitution box...

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Carl Miller Physics Lab 3/3/08 Wheatstone Bridge Objective - The objective of this experiment is to explore and study the fundamental properties of the Wheatstone bridge circuit and how it is used to measure electrical resistances. Apparatus - the Wheatstone bridge circuit consisted of a circuit of unknown resistance, three known resistors a galvanometer, a variable resistor and a power source. Theory - The Wheatstone bridge works by taking the amount of resistivity, and matching it through a series of adjustable resistors. Results and Error Analysis
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Unformatted text preview: - the heathkit resistance substitution box measured out to have a resistance of 4,513 ohms, the actual resistance was 4,500 ohms giving a 2.166% error. When we reset theheathkit resistance substitution box to 470 ohms we ended with 441 ohms giving a 6.2% error. Questions- (1) it is beneficial to balance the Wheatstone bridge as closely as possible to the 50-cm mark along the slide wire in order to keep the circuit constant as resistances are changed and measured through a null method....
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