Question

Which of the following should satisfy for measuring higher temperatures using a thermocouple?

(a) no wire is required

(b) wire must be small

(c) wire must be thin

(d) wire must be heavy

I got this question during a job interview.

Enquiry is from Thermoelectric Transducer topic in chapter Transducers of Electrical Measurements

Answer 1

The correct option is (d) wire must be heavy

To explain I would say: Higher temperatures can be measured using a thermocouple by making the wire heavy. Increase in size of the wire affects the response time of the thermocouple.