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Part 1 – Wheatstone bridge1) Build the circuit in Figure 4.The circuit parameters are: VS = 12V | R1= 15kΩ | R2= 3kΩ | R3= 10kΩ | RX= 10kΩFor R3use a 50kΩ potentiometer adjusted to the resistance value given above.Figure 4: Wheatstone bridge2) Theoretically calculate the voltage across nodes A and B (VAB). Show all your workings.3) Using a DMM, measure the voltage across nodes A and B (VAB). 4) Theoretically calculate the value of R3 to balance the bridge. Show all your workings.5) Balance the bridge (by making VAB = 0) by changing the potentiometer. Once the bridge is balanced, carefully disconnect R3 from the circuit and measure the value using a DMM. 6) Analyse and comment on all the values obtained from Steps 2 – 5. 7) Reconnect R3 back to the circuit. Replace RX by a 15kΩ resistor. Try to balance the bridge and obtain the value of R3. If you were unable to balance the bridge, explain why not. Justify your answer. 8) For the given values of R1, R2 and R3, what is the maximum possible value of resistance, RX, that can be measured using the Wheatstone bridge? Provide necessary justification. 9) Consider the Wheatstone bridge circuit given in Figure 4. Assuming VS = 12V, R1 = 15kΩ, R2 = 3kΩ, and R3 = 50kΩ, plot VAB as a function of RX over the interval 0 ≤ RX≤ 10kΩ. From the plot, obtain an approximate linear relationship between VAB and RX assuming input range is [0, 10kΩ]. Determine the sensitivity and bias.What are possible applications of such Wheatstone bridge in real life?Part 2 – Relaxation Oscillator1) Build the relaxation oscillator circuit in Figure 5
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