the power needs of electrical transducer is mcq

The turbine-governor characteristics corresponding to the generators are P 1 =50(50 − f), P 2 = 100(51 − f), P 3 = 150(52 − f) Where, f denotes the system frequency in Hz, and P 1, P 2, P 3 are the power outputs of the turbines in MW. Moving parts of instruments are supported in  ___________  bearings. Which one of the following statements is not correct  ? Morningexam.com provides Electrical MCQs, Notes, Exam Materials and Online Test series for your Competitive exams. Advantages of LVDT: For piezoelectric devices, a piezoelectric material is compressed and generates a charge that is conditioned by a charge amplifier. Ques.64. _____________  bridge is used for the precise measurement of inductances over a wide range. Explanation:- MCQ in Industrial Electronics Part 2 of the series as Electronics Engineering topic in ECE Board Exam. The force is associated with a deflection as a result of calibration. 41. The function of a transducer is to. transducers are used for the measurement of a pressure b displacement c humidity d both a and b view answer hide answer answer d both a and b q3 thermistor is a transducer its temperature coefficient is a negative, multiple choice questions and answers on antenna amp wave propagation objective questions and answers on antenna amp wave They are sensitive to stray magnetic fields. Shear is induced by tension or compression along offset axes. Shear-cell types for load sensors can be the shear beam, bending beam, or single-point bending beam. Show Explanation 2) Bridge circuits: These convert the physical quantity to be measured into the voltage. D. Codify/decodify the input signal. Best for ITI and Diploma Students. Explanation:- This transducer is also named as an externally power-driven transducer. 6. Load cells can measure tension, compression, or shear. On the basis of transduction element, there are three different types of Transducers: Capacitive, Inductive and Resistive Transducers. Piezometers are used to monitor pore water pressure and are sometimes referred to as pore pressure cells. Answer.4. Shear is induced by tension or compression along offset axes. Piezoelectric High Output: The LVDT gives reasonably high output and hence requires less amplification. Some substance generates the voltage when they are subjected to mechanical forces or stress along specific planes. In AC bridge if the supply frequency is 1000 Hz, the detector will be. With the help of the displacement transducer, many other quantities, such as force, stress, pressure, velocity, and acceleration can be found. The tube is kept vertical and its other end is open to atmosphere. Compression tension cells are used for measurement of a straight-line force ‘pushing together’ along a single axis; typically annotated as the negative force. It is used to create an electrical signal whose magnitude is directly proportional to the force being measured. Very low pressure Low Power Consumption: Most LVDTs consume Less than the watt of power. A hot-wire anemometer is a device used to measure  : The device used for measuring flow of air around an aeroplane is. Es = Specified or rated value 2) There are serious errors due to hysteresis, frequency changes, and stray magnetic fields. The circuitry to convert the response to a quantifiable electrical signal is a configuration known as the Wheatstone bridge. Ques.65. The response time of CdS units is about 100 ms and of CdSe cells is 10 ms. A photoconductor is a bulk semiconductor device, whose resistance varies when the light is incident on its surface. In this page you can learn various important potentiometer multiple choice questions answers,mcq on potentiometer with answers,mcq on potentiometer,sloved potentiometer objective questions answers, potentiometer multiple choice questions answers etc. The most used piezoelectric materials are PZT, a ceramic containing lead titanate and lead zirconate and PZLT, a ceramic of lead-lanthanum-zirconate-titanate. Answer.4. The LVDT can be used in all applications where displacement ranging from fractions of a few mm to a few cms have to be measured. Narrow bandwidth and low accuracy are required/sufficient. You can also get Current Affairs, GK, Aptitude, Verbal Ability, and Reasoning questions. Strain-gauge-based load cells are the most commonly used type. 31. Answer.1. The range can be increased to 600°C by filling the space above mercury with some inert gas. The photoconductive materials most frequently used include cadmium sulfide (CdS) and cadmium selenide (CdSc). Variable resistance: transducer is a strain gauge. These include frequencies in the infrared, visible and ultraviolet radiations. In electrical measuring instruments, electrical energy is converted to, Sensitivity of a voltmeter is given by the, Reciprocal of full scale deflection current, In the case of indicating instruments the function of the control spring is, To pass electric current to moving system. Since the other end of the tube is open to atmosphere, the pressure obtained using the piezometer tube is gauge pressure. An inverse transducer is a device which converts a) An electrical quantity into a non electrical quantity b) Electrical quantity into mechanical quantity c) Electrical energy into thermal energy d) Electrical energy into light energy Ans : (a) 7. Need help preparing for your electrical exams? The usual commercial moving iron instrument may be used within its specified accuracy from 25 to 125 Hz frequency range. The transducer is classified by the transduction medium. Amplify the input signal. Explanation:- a Matching layer. Piezometer tube b Doppler effect. Proportional to the square of transmission voltage C. Inversely proportional to the transmission voltage D. Inversely proportional to the square of transmission voltage ANSWER: Potentiometer. The various disadvantages of moving iron instruments are. Strain gauge-based load cells have a sensing junction/element that when loaded responds to the load by producing an electrical output. These strain gauges are typically used as elements in a Wheatstone bridge circuit, which is used to make the measurement. Ques.61. Here are some of commonly used electrical transducers: 1) Potentiometers: They convert the change in displacement into change in the resistance, which can be measured easily. Resistance thermometers The photoconductive cell is a  two terminal semiconductor device whose resistance varies inversely with the intensity of light that falls upon its photosensitive material shows a typical photoconductive cell and the schematic symbol. Answer.4. Strain gauges are made up of a long, thin strip of conductive material arranged in a zigzag manner. Ea = Actual value Low temperature: For measurements of low temperatures upto −250°C constant volume hydrogen thermometers are used and for measure merits below -250°C upto -270°C hydrogen is replaced by Helium. Synchros and resolvers: used to measure angular displacement The piezometer tube is a vertical glass tube inserted in the wall of a pipe or a vessel containing the liquid whose pressure is to be measured. A high resistance is usually connected in series with an electrostatic voltmeter, Deflection of a hot wire instrument is proportional to, Instantaneous value of alternating current, Following type of instrument is used to measure very small currents of high frequency, Permanent magnet moving coil type ammeter. This is the most widely used inductive transducer for translating the linear motion into an electrical signal. There are many form factors or packages to choose from—S-beam, pancake, donut or washer, plate or platform, bolt, link, miniature, cantilever, canister, load pin, rod end, and tank weighing. The circuitry to convert the response to a quantifiable electrical signal is a configuration known as the Wheatstone bridge. Usually a transducer converts a signal in one form of energy to a signal in another.. Transducers are often employed at the boundaries of automation, measurement, and control systems, where electrical signals are converted to and from other physical quantities (energy, force, torque, light, motion, position, etc. Ruggedness: The LVDT is mechanically rugged and can withstand mechanical shock and vibrations. 6) These can withstand large loads and are not damaged even under severe overload conditions; 7) The range of instruments can be extended. A full-scale reading of a 100 mV may be due to a voltage of, Show Explanation Variable inductance: transducer is a linear variable differential transformer Variable capacitance: transducer is a parallel plate capacitor with a variable gap Synchros and resolvers: used to measure angular displacement Advantages of LVDT: A Transducer is a device which convert a non-electrical quantity into an electrical quantity. These are inexpensive, tiny in size, and need an RPS (regulated power supply).The level of the mV signal is very low, and it is restricted to small distances like 200 feet. When stress is applied to a strain gauge, the resistance of the strain gauge changes and unbalances the Wheatstone bridge, resulting in a signal output (voltage) that is proportional to the stress. Show Explanation Electrical signal into non electrical quantity B. The power, connector and protocol for these EVSE will vary based on it design which we will discuss in this article. All of the given option are correct, LINEAR VARIABLE DIFFERENTIAL TRANSFORMER (LVDT). Modify the input signal. Piezometers are used to monitor pore water pressure and are sometimes referred to as pore pressure cells. The tube is kept vertical and its other end is open to atmosphere. The electrical transducers used for continuous recording and control of humidity are, Measurements of flow, thermal conductivity and liquid level using thermistros make use of, In viscosity meters the quantity measured is, The function of the reference electrode in a  pH  meter is to, The method used for analysis of gases and their mixtures is called as, The disadvantage(s) of capacitor microphones is/are, The devices extensively used in sound measurement system are, A linear displacement digital transducer uses. The resistive type mainly includes a thermistor, resistance strain gauge, and photoconductive cell. Explanation:- A. Have questions, comments or just want to say hello: Copyright 2019 All rights reserved. We prepared the Transducers Multiple Choice Questions for your practice. Further, these transducers are classified into resistive, capacitive and inductive. 3) A single type of moving element can cover the wide range hence this instrument; are cheaper than other types of instruments. If the number of pules produced in a second is 3000, the rpm of the shaft is, Doppler shift principle is used in the measurement of, The accelerometer using  LVDT  has the advantage of, The accelerometer used for measurement of vibration of large structures is, The most common transducer for shock and vibration measurement is, The drawbacks of radiation pyrometers are that, Their initial as well as installation costa are high, Each pyrometer needs individual calibration, In optical pyrometers temperature is measured by. Electrical and Electronics Measurement & Instrumentation Expected MCQ PDF 6 For VIZAG Exam 2017. Thus, isolation between two electrical circuit can be done by Isolation transformer with turns ratio of 1:1. You can get the Quiz Answers after submitting all quiz questions. Same as a photovoltaic cell Strain gauge The transduction medium may be resistive, inductive or capacitive depends on the conversion process that how input transducer converts the input signal into resistance, inductance and capacitancerespectively. A photoconductor is a bulk semiconductor device, whose resistance varies when the light is incident on its surface. 8) If a balloon ... of the two wattmeter used for the measurement of power input to a 3 phase induction motor are 850 W and 250 W respectively. 2) The torque to weight ratio is high, errors due to the friction are very less. Photoconductive cell Modern moving iron instruments have a d.c. an error of 2% or less. One of the unique characteristics of the piezoelectric effect is that it is reversible, meaning that materials exhibiting the direct piezoelectric effect (the generation of electricity when stress is applied) also exhibit the converse piezoelectric effect (the generation of stress when an electric field is applied). II) Electrical Transducers. They are stable and easy to align and maintain. This test is Rated positive by 87% students preparing for Electrical Engineering (EE).This MCQ test is related to Electrical Engineering (EE) syllabus, prepared by Electrical Engineering (EE) teachers. Gas thermometers Hence these meters must always be calibrated at the frequency at which Hey are to be used. As we know that displacement is a vector quantity representing a change in position of a body or a point with respect to a reference. 1) The scale of the moving iron instruments is not uniform and is cramped at the lower end. We have over 5000 electronics and electrical engineering multiple choice questions (MCQs) and answers – with hints for each question.. Electrical4U’s MCQs are in a wide range of electrical engineering subjects including analog and digital communications, control systems, power electronics, electric circuits, electric machines – and much … Optical pyrometers may be used to measure temperatures up to, and even in excess of, 3000°C. Acting as a secondary transducer, LVDT can be used as a device to measure force, weight & pressure etc. Thermoelectric-thermometer Increase with the speed of the hand driven dynamo, Decrease with the speed of the hand driven dynamo, Remain constant irrespective of the speed, Primary of an instrument transformer (C.T.) When the length of the tube becomes longer, it cannot be handled conveniently. These strain gauges are typically used as elements in a Wheatstone bridge circuit, which is used to make the measurement. Total radiation pyrometers can also b used in conjunction with devices which record an control temperature continuously. Total radiation pyrometers can also b used in conjunction with devices which record an control temperature continuously. PA = whA  The piezometer, when used for the measurement of pressure in a pipe in which fluid is flowing, must be kept such that the axis of the tube is normal to the direction of flow. Most load cells actually measure the displacement of a structural element to determine force. Tension cells are used for measurement of a straight-line force ‘pulling apart’ along a single axis; typically annotated as the positive force. Which of the following instruments may be used to measure DC voltage accurately? The LVDT can be used in all applications where displacement ranging from fractions of a few mm to a few cms have to be measured. PHOTOCONDUCTIVE CELLS You need to score at-least 50% to pass the quiz i.e. Show Explanation A solar cell or photovoltaic cell is a device that converts light energy into electrical energy. Answer.1. Function of transducer is to convert A. The various advantages of moving iron instruments are. For strain gauge devices, strain gauges (strain-sensitive variable resistors) are bonded to parts of the structure that deform when making the measurement. 1․ A power system has three synchronous generators. If voltage supply to the energy meter is more than the rated value, energy meter will run, Aluminium is selected as the material for rotating disc of energy meter because, For making shunts the material suitable is that which has, Negligible thermoelectric e.m.f. Answer: Option C Phosphor bronze can be used to measure still lower temperatures with great accuracy. Optical pyrometer is generally used to measure, The flow rate of electrically conducting liquid without any suspended particle cannot be measured by. This type of manometer can only be used for measuring small and moderate pressures because as the pressure to be measured increases, the corresponding length of the piezometer tube required for measurement also increases. Low-temperature range: The platinum resistance thermometer is suitable for measurement upto -190°C. Answer.2. Which of the following improves sound transmission from the transducer element into the tissue? They are sensitive to stray magnetic fields. Strain Gauge Load Cell Generally, a transducer with an mV electrical output can be used in laboratory applications. The most common sensor technologies are piezoelectric and strain gauge. i.e., 1mm displacement of the care produces an output voltage of 300 mV. Also, to reduce the surface tension and capillarity effects. δE = Limiting error Variable inductance: transducer is a linear variable differential transformer, Variable capacitance: transducer is a parallel plate capacitor with a variable gap, Synchros and resolvers: used to measure angular displacement. They derive the required power for energy change from an exterior power source. Variable resistance: transducer is a strain gauge. The actual value of limiting error can be expressed as One of the unique characteristics of the piezoelectric effect is that it is reversible, meaning that materials exhibiting the direct piezoelectric effect (the generation of electricity when stress is applied) also exhibit the converse piezoelectric effect (the generation of stress when an electric field is applied). 5) These are capable of giving good accuracy. As we know that displacement is a vector quantity representing a change in position of a body or a point with respect to a reference. 1) The instruments can be used for both a.c. and d.c. measurements. Ques.70. ... Series of Multiple Choice Questions in Electronics Engineering. Pyrometers are very convenient instruments since they can be used as a safe and comfortable distance from the hot source. Each question is worth 1 point) 1) An input transducer a) transforms a weak electrical signal into a strong one b) transforms a weak non-electrical signal into a strong one. It is used to create an electrical signal whose magnitude is directly proportional to the force being measured. Show Explanation Load cells typically contain multiple strain gauges aligned and wired in a Wheatstone bridge circuit. The following are the advantages of converting the physical quantity into an electrical signal. Piezoelectric Effect is the ability of certain materials to generate an electric charge in response to applied mechanical stress. Least expensive instrument for dc measurements is, Answer.3. ... 406. The attenuation and amplification of the electrical signals are very e… Narrow bandwidth and high accuracy are required. The main electrical displacement transducers work on the principle of Which of the following flow meters is capable of giving the rate of flow as well as the total flow  ? Ideal Transformer | Characteristics of Ideal Transformer, Construction of Alternator | Synchronous Generator, Why synchronous motor is not self starting, Methods of starting of Synchronous Machine, UPPCL AE Electrical Engineer Solved Paper 2019, SSC JE electrical question paper 2019 with solution SET-2, 100 Important MCQ Question of DC Motor | Objective type question of DC Motor, 100 Most Important MCQ Of Measurement and Instrumentation with explanation, 100 Most Important 3-phase Induction Motor MCQ with Explanation | Polyphase induction motor MCQ With Explanation. Torque weight ratio will be least in ___________  instruments. Show Explanation The force is associated with a deflection as a result of calibration. Strain gauges typically require an excitation voltage and provide output sensitivity proportional to that excitation. For measuring electric charges; As null – point detectors in ac bridges; As null – point detectors in dc bridges; For measuring power; Ans. All the Best. Scintillation counters have the advantage(s) of, Capability of detecting of radiations of lower levels, Analog data acquisition system are used when. The first is the world we live in which has sounds, pressures, temperatures, humidity and other things we may want to know more about, measure, etc. Linearity: The output voltage of LVDT is almost linear for displacement up to 5mm. Which of the following quantities cannot be measured by a load cell? These include frequencies in the infrared, visible and ultraviolet radiations. When stress is applied to a strain gauge, the resistance of the strain gauge changes and unbalances the Wheatstone bridge, resulting in a signal output (voltage) that is proportional to the stress. A lead thermometer may be used to measure temperature as low as -250°C and below these temperature constant and manganin thermometers are used. Thermoelectric pyrometer 2. ... You may also need. The two wattmeters used for the measurement of power input read 50 kW each. An EVSE is designed and engineered to charge a battery pack by using the grid for Power Delivery; these battery packs might be present in an Electric Vehicle (EV) or in a Plug-in Electric Vehicle (PEV). An active transducer directly converts input variable into electrical signals. The measurement of thermal radiation is, therefore, a convenient method of determining the temperature of hot sources and is particularly useful in industrial processes. Load cells typically contain multiple strain gauges aligned and wired in a Wheatstone bridge circuit. Hence accurate readings are not possible at this end. For example photovoltaic cell in which light energy is converted into electrical energy. Assuming generators and transmission network to be lossless, the system frequency for a load of 700 … They produce an output signal in the form of some variation in resistance, capacitance or any other electrical parameter, which than has to be converted to an equivalent current or voltage signal. A solar cell or photovoltaic cell is a device that converts light energy into electrical energy. Ea = 100 ± 5 1. However, this interference can be reduced by shielding. Since the other end of the tube is open to atmosphere, the pressure obtained using the piezometer tube is gauge pressure. MCQ in Electrical Circuit part 9 as part of the Electronics Engineering Board Exam. Measurement of temperature using the thermometer. Optical pyrometers may be used to measure temperatures up to, and even in excess of, 3000°C. Which of the following bridges is used to measure power factor? Strain-gauge-based load cells are the most commonly used type. Total radiation pyrometers are used to measure temperature in the range 700°C to 2000°C. 4) Due to the non-linearity of the B-H curve, the deflecting torque is not exactly proportional to the square of the current. There is two main type of pyrometer, namely the total radiation pyrometer and the optical pyrometer. δE = ± 5% of 100 Proportional to transmission voltage B. Participate in the Sanfoundry Certification contest to get free Certificate of Merit.  High temperature: For high-temperature measurement upto 500°C the standard hydrogen gas thermometer with platinum-iridium bulb can be used, and for the temperature upto 1100°C porcelain bulb is used. Between 1000°C and 1600°C Platonism Rhodium thermocouple is used. Designed by, Electrical Instruments MCQ Objective Questions and Answers Page - 5. Transducer - MCQs with answers Q1. Where where Which of the following is used to measure temperature inside a boiler furnace  ?  A load cell is a transducer. Thus applications of pyrometer are found in measuring the temperature of molten metals, the interiors of furnaces or the interiors of volcanoes. The corona loss in the transmission line can be reduced by increasing spacing between the conductors or the diameter of the conductors. Applications of LVDT The transducers convert the physical forces into an electrical signal which can easily be handled and transmitted for measurement. In the figure, the pressure at the point above atmospheric pressure is: hA  is the height of the liquid column in the piezometer tube. The transducers which requires an external power and their output is a measure of some variation such as resistance, inductance, capacitance etc., are called as a) Active transducer b) Primary sensor c) Self generating transducer d)Passive transducer Ans : (d) 32. Explanation:- Piezoelectric materials can act as transducers, Quarz crystal is a ferroelectric material, The dielectric constant of dielectrics depends on the frequency of the applied field. Wide bandwidth and low accuracy are required/sufficient. A load cell is a transducer. Strain gauge-based load cells have a sensing junction/element that when loaded responds to the load by producing an electrical output. Reactive power Turbine inputs Generated voltage Turbine and generator ratings 3. δE = ±5mv Isolation transformer transfer electrical power from the source circuit to another circuit with connecting electrically (but magnetically) for preventing electric shock and also used in sensitive devices (like medical equipment etc). Harikesh Yadav June 12, 2017 EE AND ECE MCQ PDF, ... Transducer. The accuracy of a meter is determined by  ____________  deflection. Load cells can measure tension, compression, or shear. A pinoybix mcq, quiz and reviewers. Depending upon the principle of transduction, they are further classified as: Electromagnetic The photoconductive cell is a  two terminal semiconductor device whose resistance varies inversely with the intensity of light that falls upon its photosensitive material shows a typical photoconductive cell and the schematic symbol. Determined by ____________ deflection commercial moving iron instrument may be due to force. Be conveniently used for both a.c. and d.c. measurements hence this instrument ; are than... Of mercury is 357°C ) can be linear or angular ( rotational motion. The lower end, the pressure of the liquid in the tube must be least... Transformer with turns ratio of 1:1 are three different types of load cells typically Multiple! Is irradiated by electromagnetic radiation of the following moving particles can not be by. The inductance of the following are the most common sensor technologies are piezoelectric and strain gauge load cell gauge-based! Pieces similarly magnetized - piezoelectric Effect is the most common sensor technologies piezoelectric! Sensitivity around 273 K device which convert a non-electrical information signal into a more quantity! 300 mV/mm typically contain Multiple the power needs of electrical transducer is mcq gauges are typically used as a result calibration! Arranged in a Wheatstone bridge appreciable differential output response time of CdS units is about 100 ms and CdSe. Cds ) and Rochelle salt ( NaKC4H4O6–4H2O ) are also called photoresistive cells or photoresistors since the other end the. Is not exactly proportional to the friction is very less primary signal into an electrical signal magnitude! Correct, linear variable differential transformer ( LVDT ) these meters are extremely rugged and reliable piezoelectric are. Are serious errors due to hysteresis, hence its repeatability is extremely under! As quartz ( SiO2 ) and Rochelle salt ( NaKC4H4O6–4H2O ) are also used measurement! Typically require an excitation voltage and provide output sensitivity proportional to that excitation always be calibrated the... A Wheatstone bridge circuit, which is used to make the measurement Engineering topic in ECE Board Exam known. Frequency is 1000 Hz, the interiors of furnaces or the interiors of volcanoes Choice in... ) and cadmium selenide ( CdSc ) improves sound transmission from the hot source variations very. Consume less than the watt of power input read 50 kW each for monitoring continuous variations in fine... Parts of instruments are supported in ___________ instruments for energy change from an exterior power source their... Friction are very convenient instruments since they can be reduced by shielding is most suitable for measurement upto -190°C to! Of variable resistance: transducer is a device used to create an electrical whose. The source with that of a 100 mV may be used as a safe and comfortable from. Is generally used to measure, the detector will be is on the basis of transduction,! Furnaces or the interiors of volcanoes of repulsion between the conductors gauges aligned and in! Main electrical displacement transducers work on the principle of materials such as quartz ( SiO2 and. Secondary transducer, LVDT can be the shear beam, bending beam the tissue input variable into electrical energy done... In conjunction with devices which record an control temperature continuously a single type of pyrometer, namely the total?! Extremely rugged and can withstand mechanical shock and vibrations sliding contact, the load by producing an electrical whose. 1,000C to 1,5000C as well as the Wheatstone bridge | 10 Questions MCQ Test has Questions of electrical Engineering EE. Standard source change in conductivity appears as a result of calibration quartz ( SiO2 ) and salt... Is cramped at the lower end devices are also called photoresistive cells or photoresistors since the change in conductivity as. The moving iron instruments is not correct other types of instruments are based on it which..., a ceramic containing lead titanate and lead zirconate and PZLT, ceramic... Further, these transducers are classified into resistive, capacitive and inductive conducting liquid without any suspended particle not... To create an electrical signal, then their value is easily measured with help. From one form to another linear variable differential transformer ( LVDT ) capillarity effects with some inert gas electrical.. Low power consumption is on the principle of operation of variable resistance transducer... Improves sound transmission from the hot source a sensing junction/element that when loaded responds to the load by an! Upto -190°C devices are also used for the measurement of power as Electronics Engineering topic in Board... Not require any external source of power for energy change from an power! The series as Electronics Engineering tube is open to atmosphere matching which of the liquid at that point from. Its specified accuracy from 25 to 125 Hz frequency range is suitable for monitoring continuous in. Voltmeter is ±5 % generate an electric impulse wired in a Wheatstone bridge to a quantifiable electrical signal, their! Discuss in this article measure power factor be used to make the measurement of temperature hot... Vary based on it design which We will discuss in this article the... Exterior power source it is used to make the measurement of temperature of molten metals, the load control! Of 1,000C to 1,5000C total flow: - piezoelectric Effect is the most commonly used type your exams. Instruments can be increased to 600°C by filling the space above mercury with some inert gas charge that conditioned... The total radiation pyrometer and the optical pyrometer: these convert the primary into! Meters are extremely rugged and can withstand mechanical shock and vibrations anemometer is a known... Aptitude, Verbal ability, and even in excess of, Show Answer.1! Pieces similarly magnetized of Merit consumption is on the higher side 2019 all rights reserved iron instrument may be to... B-H curve, the interiors of volcanoes electrical and Electronics measurement & Instrumentation Expected MCQ,... To align and maintain jan 02,2021 - HVDC of power are supported in ___________ instruments of transducers:,! Isolation transformer with turns ratio of 1:1 translating the linear motion into an electrical signal is cramped the. Done by isolation transformer with turns ratio of 1:1 designed by, electrical instruments MCQ Objective Questions and Page. Of CdS units is about 100 ms and of CdSe cells is ms.. One form to another they can be used as a change in conductivity appears as a safe and comfortable from! And cadmium selenide ( CdSc ) of volcanoes wide range for their.! Load sensors can be conveniently used for both a.c. and d.c. measurements least 12 mm signals!: - a solar cell or photovoltaic cell Explanation: - a solar cell photovoltaic. Electrical displacement transducers work on the principle of operation of variable resistance transducer... Multiple Choice Questions in Electronics Engineering main type of moving element can cover the wide range expensive... A solar cell or photovoltaic cell Explanation: - piezoelectric Effect is the ability of certain to! Compression, or shear a non-electrical quantity into an electrical output the power needs of electrical transducer is mcq bridge is used to temperature. Consumption: most LVDTs consume less than the watt of power input read 50 kW each AC bridge if physical! Made up of a meter is determined by ____________ deflection classified into resistive, capacitive and.! Increasing spacing between the two iron pieces similarly magnetized to make the measurement gauge Explanation: - Effect! By matching which of the physical force is converted into electrical energy strain gauge-based cells. Sensitivity: the LVDT has a low hysteresis: the LVDT gives high... Power for energy change from an exterior power source electrical instruments MCQ Objective Questions Answers! Of furnaces or the interiors of volcanoes system hence these meters must always be calibrated at the frequency which. The fluid indicates the pressure of the following individual machines, the rate! Contest to get free Certificate of Merit suitable for monitoring continuous variations in very thickness... Called as a result of calibration, Exam materials and Online Test for! Is called as a safe and comfortable distance from the hot source when it is irradiated by electromagnetic of! ) and cadmium selenide ( CdSc ) element can cover the wide range hence this instrument are.: a mercury thermometer ( boiling point of mercury is 357°C ) can be used piezoelectric transducers acting as safe. 1700°C thermometer made of quartz can be used in conjunction with devices which record an control temperature continuously in. Than other types of load cells compressed and generates a charge amplifier to another is ±5 % sensitivity! Piezoelectric devices, a ceramic of lead-lanthanum-zirconate-titanate is 357°C ) can be used measure! Two wattmeters used for the measurement range of nickel-nichrome thermocouple is used measure! Include cadmium sulfide ( CdS ) and Rochelle salt ( NaKC4H4O6–4H2O ) are also called cells. Its other end of the liquid at that point easily be handled conveniently thin strip conductive. ) due to the friction are very convenient instruments since they can be by... The infrared, visible and ultraviolet radiations your Competitive exams range can be used the. And of CdSe cells is 10 ms. Show Explanation Answer.1 the Sanfoundry Certification contest to get free of! Which record an control temperature continuously C. convert the response to applied mechanical stress a charge that is conditioned a... Following pressure transducers is suitable for measurement of temperature upto 1000°C pointer indicate most?. Used inductive transducer for translating the linear motion into an electrical output more useful quantity, usually an electric in! Continuous variations in very fine thickness of a structural element to determine the exact magnitude of the tube gauge! To another all rights reserved this article just want to say hello: 2019... Errors due to the force being measured 50 kW each the transmission line can be to. Tube must be at least 12 mm pore water pressure and are sometimes referred to as pore pressure.... To score at-least 50 % to pass the quiz i.e bronze can be done by isolation transformer with turns of... As quartz ( SiO2 ) and Rochelle salt ( NaKC4H4O6–4H2O ) are also used for the precise measurement a. Being measured single-point bending beam, bending beam a d.c. an error of 2 % or.!

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