Measurement and Instrumentation Theory and Application
Please answer the below question. Please show all work and write clearly. Thanks.
7.4 A null-type Wheatstone bridge is used to accurately measure the resistance of a strain gauge during a calibration procedure. The circuit shown in Figure 7.1 is used, in which the known fixed resistance values are given by R2 =331.2 ohms and R3 =327.5 ohms. The thermometer is inserted in the circuit as Ru and then the variable resistance box Rv is adjusted until the bridge output voltage V0 goes to zero. At this balance point, the value of Rv is 352.5 ohms. Calculate the resistance of the strain gauge.
Homework Answers
Solution : given R2=331.2, R3=327.5 ,Rv =352.5 ohms
> Voltage V0 goes to zero means Bridge is balanced.
>Then Bridge balance condition is
Ru × R2 = R3 × Rv
Ru = (R3 × Rv)/R2
Ru = (327.5 × 352.5)/331.2
Ru = 348.56 ohms
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Measurement and Instrumentation Theory and Application
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Measurement and Instrumentation Theory and Application
Please answer the below question for all parts. Please show all
work and write clearly. Thanks. Figure 7.9 and a hint is below.
7.23 An unknown capacitance Cu is measured using a deflection
bridge as shown in Figure 7.9. The components of the bridge have
the following values: Vs =10Vrms, C1 =50 uF, R2=80 ohms, R3=20
ohms. If the output voltage is 3Vrms, calculate the value of
Cu.
2 Zu 3 Vs R2 0...
measurement and instrumentation exercise plz read and
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Please answer the problem below for all parts. Please show all
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information that follows, showing work when helpful:
a. What is the effective resistance of the resistors you
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b. Which of your measurements had the smallest relative
uncertainty?
c. Batteries have an internal resistance, which we have
not considered in the lab. How would the internal resistance of
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