Answer to Question #38841 in Electric Circuits for Tarik F Eltaeib

Question #38841
Consider aWheatstone bridge circuit using a resistive temperature sensor Rx as shown in Figure 1.2. Further assume that R1 = 10 and R3 = 20. Assume that the current temperature is 80 ◦F and Rx (80) = 10. You wish to calibrate the sensor such that the output voltage VOUT is zero whenever the temperature is 80 ◦F. (a) What is the desired value of R2? (b) What is the output voltage (as a function of the supply voltage) at a temperature of 90 ◦F, when this increase in temperature leads to an increase in resistance of 20% for Rx?
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