With increase in temperature, the electrical conductivity of the platinum used in the resistance thermometer ?
Correct answer: B. Decreases
- A. Increases
- B. Decreases
- C. Remain constant
- D. Increases exponentially
Explanation
Platinum has a positive temperature coefficient of resistance, so its resistance increases as temperature rises. Since conductivity is the reciprocal of resistivity, its electrical conductivity decreases.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Process Control and Instrumentation
254 free Process Control and Instrumentation MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Process Control and Instrumentation questions
Thermal well made of _____________ gives the fastest speed of response, while measuring temperature by thermocouples?
The level of a liquid under pressure can be determined using___________________?
_____________ is an example of distributed parameter system ?
For measuring the temperature of a red hot furnace, which is the most suitable instrument ?
Bourdon tube is never made of________________?
The pressure sensing element of elastic type pressure gauge is never made in the form of a_________________?