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Resistance

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Question

The resistance temperature characteristic: temperature transducer is shown in fig transducer is

A

Platinum RTD

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B

Nickel RTD

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C

NTC thermiston

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D

PTC thermistor

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Solution

The correct option is D PTC thermistor
There is abrupt increase in resistance of transducer after a certain temperature T. This is an attribute of self heating effect which is seen in thermisters. Also resistance of transducer increases with temperature so it has positive temperature coefficient. Note: Self heating effect is not present in RTD.

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