Given the circuit of strain gauge in a quarter bridge shown in Figure. Q4. (a) Derive the voltage output equation (Vmeans ) in terms of Vin, R1, R2, R3 and RG. (b) Given that under a strain of 0.05, the resistance value of the strain gauge changes from 3002 to 3200. Calculate the gauge factor. (c) Given Vin 5V, R2 = R3 = R4 = 3002, find Vmeans. теаns

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Wheatstone Bridge Method

A Wheatstone bridge is a circuit used to measure unknown resistance by measuring the ratios of the two branches of the circuit such that each branch has two resistance and out of four resistance one is unknown. The two branches are joined in between with the help of galvanometer which is used to determine the direction of the current. The main advantage of this circuit is that it can provide the most accurate measurement (different from a simple voltage separator).