Solev this question it has 4 parts confusing me alot and X=167 and in part c there's a bit tricky with X by providing a condition so please check a) A platinum resistance temperature detector has a resistance of 150 at 20 °C. Calculate itsresistance at X °C (a2o =0.00392).b) A copper-constantan thermocouple have c = 3.75 x 10-2 mV/°C and k =4.50x10-5 mV/°C². If T1=X °C and the cold junction T2 is kept in ice, compute the resultant electromotive force.c) A standard cell with voltage of 1.0195 V, and a variable resistor R1 are connected with 3 Vbattery, a 150 N slide wire having length of 0.1*X for X <10, 0.01*X for X >10 in potentiometer.Determine slide wire current and value of R1 when potentiometer is calibrated to measuremaximum of 1.5 V.i.ii.Find the slide wire position BC at which the sliding contact should be set for calibration.iii.Find Vx when null is obtained at 72.5 cm.To limit the maximum current to 20 µA, calculate value of R2 connected in series withstandard cell.iv.d) A strain gauge has a resistance of X N and gauge factor of 2.1, the strain is 2*10^(-3). Find thechange in resistance.

Answered: Image /qna-images/answer/e1d45779-35a3-4552-9978-c880bd9bab3a.jpg

Answered: a) A platinum resistance temperature…

a) A platinum resistance temperature detector has a resistance of 150 at 20 °C. Calculate its resistance at X °C (a20 =0.00392).

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter4: Transmission Line Parameters

Section: Chapter Questions

Problem 4.2P: The temperature dependence of resistance is also quantified by the relation R2=R1[ 1+(T2T1) ] where...

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Concept explainers

Power Measurement

According to Blondel's theorem, the total power is measured with one less number of wattmeters than the number of wires present in the system. So, a single-phase and two-wire system will require one wattmeter and a single-phase and the three-wire system will require two wattmeters, and a three-phase and the three-wire system will also require two wattmeters and a three-phase and the four-wire system will require three wattmeter devices. The wattmeter is a device that measures power using one voltage and one current input as shown in the above figure. Multiple current or voltage input pair cables are used by many power analyzers and digital storage oscilloscopes (DSOs) for measuring watts, in effect within a single instrument acting as multiple wattmeters. It is possible to measure three-phase and four-wire power with one correctly specified power analyzer.

Question

Solev this question it has 4 parts confusing me alot and X=167 and in part c there's a bit tricky with X by providing a condition so please check

a) A platinum resistance temperature detector has a resistance of 150 at 20 °C. Calculate its
resistance at X °C (a2o =0.00392).
b) A copper-constantan thermocouple have c = 3.75 x 10-2 mV/°C and k =4.50x10-5 mV/°C². If T1
=X °C and the cold junction T2 is kept in ice, compute the resultant electromotive force.
c) A standard cell with voltage of 1.0195 V, and a variable resistor R1 are connected with 3 V
battery, a 150 N slide wire having length of 0.1*X for X <10, 0.01*X for X >10 in potentiometer.
Determine slide wire current and value of R1 when potentiometer is calibrated to measure
maximum of 1.5 V.
i.
ii.
Find the slide wire position BC at which the sliding contact should be set for calibration.
iii.
Find Vx when null is obtained at 72.5 cm.
To limit the maximum current to 20 µA, calculate value of R2 connected in series with
standard cell.
iv.
d) A strain gauge has a resistance of X N and gauge factor of 2.1, the strain is 2*10^(-3). Find the
change in resistance.

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