What happens to the resistance of an RTD with an increase in temperature?

This question was previously asked in
RRB ALP Electronics Mechanic 21 Jan 2019 Official Paper (Shift 3)
View all RRB ALP Papers >
  1. It is uncertain.
  2. It increases.
  3. It remains the same.
  4. It decreases.

Answer (Detailed Solution Below)

Option 2 : It increases.
Free
General Science for All Railway Exams Mock Test
20 Qs. 20 Marks 15 Mins

Detailed Solution

Download Solution PDF

Resistance Temperature Detector (RTD)

  • A Resistance Temperature Detector is an electronic device used to determine the temperature by measuring the resistance of an electrical wire.
  • This wire is referred to as a temperature sensor.
  • For the measurement of temperature with high accuracy, an RTD is used because it has good linear characteristics over a wide range of temperatures.
  • Copper, Nickel, and Platinum are widely used metals for RTDs.
  • RTD has a positive temperature coefficient of resistance.
  • Therefore, the resistance of an RTD increases with an increase in temperature.

Latest RRB ALP Updates

Last updated on Jul 21, 2025

-> The Railway Recruitment Board has scheduled the RRB ALP Computer-based exam for 15th July 2025. Candidates can check out the Exam schedule PDF in the article.

-> RRB has also postponed the examination of the RRB ALP CBAT Exam of Ranchi (Venue Code 33998 – iCube Digital Zone, Ranchi) due to some technical issues.

-> SSC Selection Post Phase 13 Admit Card 2025 has been released @ssc.gov.in

-> UGC NET June 2025 Result Out at ugcnet.nta.ac.in

-> There are total number of 45449 Applications received for RRB Ranchi against CEN No. 01/2024 (ALP).

-> The Railway Recruitment Board (RRB) has released the official RRB ALP Notification 2025 to fill 9,970 Assistant Loco Pilot posts.

-> The official RRB ALP Recruitment 2025 provides an overview of the vacancy, exam date, selection process, eligibility criteria and many more.

->The candidates must have passed 10th with ITI or Diploma to be eligible for this post. 

->The RRB Assistant Loco Pilot selection process comprises CBT I, CBT II, Computer Based Aptitude Test (CBAT), Document Verification, and Medical Examination.

-> This year, lakhs of aspiring candidates will take part in the recruitment process for this opportunity in Indian Railways. 

-> Serious aspirants should prepare for the exam with RRB ALP Previous Year Papers.

-> Attempt RRB ALP GK & Reasoning Free Mock Tests and RRB ALP Current Affairs Free Mock Tests here

-> Bihar Police Driver Vacancy 2025 has been released @csbc.bihar.gov.in.

->UGC NET Final Asnwer Key 2025 June has been released by NTA on its official site

More Sensors Transducers and Applications Questions

More Measuring Instruments Questions

Hot Links: teen patti bliss teen patti gold old version mpl teen patti teen patti bonus teen patti joy mod apk