In a temperature sensing element ________(a) low value of α is required(b) infinite value of α is required(c) α must be zero(d) high value of α is requiredI have been asked this question in an interview.The doubt is from Resistance Temperature Detector in chapter Transducers of Electrical Measurements

In a temperature sensing element ________(a) low value of α is requir

1.	In a temperature sensing element ________(a) low value of α is required(b) infinite value of α is required(c) α must be zero(d) high value of α is requiredI have been asked this question in an interview.The doubt is from Resistance Temperature Detector in chapter Transducers of Electrical Measurements
Answer» The CORRECT choice is (d) high value of α is REQUIRED The BEST I can explain: In order to achieve a LARGE change in the value of resistance for a SMALL change in the value of temperature, high value of α is required. Change in resistance is measured through a Wheatstone’s bridge.

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