If we want to measure temperature with high accuracy, RTD is the only one solution in industries. Resistance and Resistive circuits MCQ: Interactive multiple choice questions or quiz on resistance and resistive circuits. A temperature sensor is a device, usually an RTD (resistance temperature detector) or a thermocouple, that collects the data about temperature from a particular source and converts the data into understandable form for a device or an observer. Q2. c) Rt = Rref [1-αt] Because, whatever the materials actually we are using for making the RTD that should be pure. In a Wheatstone bridge method, the bridge is said to be balanced, when the current through the galvanometer is A. Choose the letter of the best answer in each questions. When IR radiation come. 601. Many RTD elements consist of a length of fine wire wrapped around a ceramic or glass core but other constructions are also used. View Answer, 4. Selectivity varies with receiving frequency, frequency is raised. a) a electrical transducer So, that it can be used in the hostile environment to reduce the chances of oxidation. Working principle of RTD. ANSWER: D. All of these . 1. Dec 27,2020 - Test: Resistivity Temperature Coefficient Of Resistance | 20 Questions MCQ Test has questions of Electrical Engineering (EE) preparation. We hope the given NCERT MCQ Questions for Class 12 Physics Chapter 14 Semiconductor Electronics: Materials, Devices and Simple Circuits with Answers Pdf free download will help you. A resistance temperature detector (RTD) can be connected with 2, 3 or 4 wires. RTD’s come in many forms, but usually appear in sheathed form. This detector work on sample principal that increase in temp. It consists of a non-metallic resistor that is used as the temperature sensing element. b) infinite value of α is required Answer: c Explanation: 15. b) Rt = Rref [1+α∆t] a) 100 to 450 K The resistance of hot filament of the bulb is about 10 times the cold resistance. The temperature sensor of the PAU series contains a sensor called "Platinum resistance thermometer detector" which is used along with thermocouple. That is why we need to compensated the RL resistance as we discussed already by connecting one dummy line ‘C’ as shown in fig.4. In an a.c. generator, a coil with N turns, all of the same area A and total resistance R, rotates with frequency ω in a magnetic field B the maximum value of emf generated in the coil is (a) NABR (b) NABω (c) NABRω (d) NAB. Recorder­:-They are used to record the IR spectrum, white paper or transparent sheet. 50+ MCQ with answer and reasoning a) Low melting point b) High oxidation resistance c) Both a. It is also known as a resistance thermometer. a) True Join our social networks below and stay updated with latest contests, videos, internships and jobs! So, a brief description about the platinum resistance thermometer detector is given here. The output taken from the remaining two ends as shown in fig.3. These objective type High Voltage Engineering questions are very important for campus placement test, semester exams, job interviews and competitive exams like GATE, IES, PSU, NET/SET/JRF, UPSC and diploma. MCQ Topic Outline included in ECE Board Exam Syllabi . This wire is referred to as a temperature sensor. c) α must be zero The kinetic energy of a bounded electron is (a) less than that of unbounded electron (b) greater than that of unbounded electron (c) equal to that of unbounded electron (d) infinite (e) none of the above . Resistance Temperature Detector (RTD) Questions – 1. Low resistance is the resistance of the order of A. Dear Readers, Welcome to High Voltage Engineering multiple choice questions and answers with explanation. Resistance thermometers or resistance temperature detector works on the principle of positive temperature coefficient of resistance i.e. The type of force applied through die in forging is a) Tensile force b) Compressive force c) Shear force d) Any of the above. View Answer, 10. c) positive temperature coefficient of resistance Q.84. Also learn: Tactile sensor MCQ Questions. RTI (Resistance Temperature Detector) Made of Ni-Cu alloys. Q.131.As temperature increases, if resistance increases then device is having (a) NTC (b) PTC (c) STC (d) ETC. Temperature . How can corrosion be prevented in a resistance thermometer? The resistance tends to be almost linear with temperature – the higher the temperature, the larger the resistance. April … Resistance temperature detectors B. Thermistors C. Ultrasonic D. All of these View Answer / Hide Answer. If we know the values of VS and VO, we can find Rg and then we can find the temperature value using calibration equation. We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites. Subject: Manufacturing Process 2. Resistance thermometers, also called resistance temperature detectors (RTDs), are sensors used to measure temperature. A Resistance Thermometer or Resistance Temperature Detector is a device which used to determine the temperature by measuring the resistance of pure electrical wire. If the strain on the wire is increasing, then the tension increases. S Bharadwaj Reddy September 23, 2019 April 27, 2020. Resistance temperature detector is ___________ a) M U /M A Converter b) A/M A Converter c) R/M A Converter d) None of the above Ans: (c) 125. Most metallic conductors have a ________ So, ultamitely increase resistance and current flow is change. Answer: b Explaination: Pt100 is a resistance temperature detector, made of material Platinum (= Pt_) and its resistance value at 0 °C temperature is 100 ohm (=_100). So, the RTD value is measured by using a bridge circuit. In the case of platinum, the resistance change is 0.4% per °C. The balance was obtained at 60 cm. The sensor is the combination of the transducer and electronics that measure the resistance. Resistance Temperature Detector (RTD) is a temperature sensor which measures temperature using the principle that the resistance of a metal changes with temperature. Metals are having different resistance variations with respective to the temperature by the... Also increases bulb is about 10 times the cold resistance the hostile environment reduce. To 3″ plant is in operation electric current through the RTD leads we want measure. 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