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High-temperature range: Platinum resistance thermometers can be used to measure temperature upto 700°C with the coil enclosed in the glass bulb and lead made of copper and upto 1300°C with the coil enclosed in porcelain with platinum leads. Sometimes the term solar cell is reserved for devices intended specifically to capture energy from sunlight, while the term photovoltaic cell is used when the light source is unspecified. 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. Which one of the following pressure transducers is suitable for measurement of high pressure  ? 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.  A load cell is a transducer. A gallium boiling point 1700°C thermometer made of quartz can be conveniently used for measurement of temperature upto 1000°C. Thus, isolation between two electrical circuit can be done by Isolation transformer with turns ratio of 1:1. The sensitivity inaccuracy of an instrument does not depend on, The error, when reading at half-scale in an instrument, is, The extent to which the characteristics remain linear, The degree to which the repeatability continues to remain within specific limits. The dynamic response is limited. No negative points for wrong answers. Narrow bandwidth and high accuracy are required. Optical pyrometers may be used to measure temperatures up to, and even in excess of, 3000°C. Answer.1. For measuring electric charges; As null – point detectors in ac bridges; As null – point detectors in dc bridges; For measuring power; Ans. You can get the Quiz Answers after submitting all quiz questions. Since the other end of the tube is open to atmosphere, the pressure obtained using the piezometer tube is gauge pressure. They are stable and easy to align and maintain. The measurement of thermal radiation is, therefore, a convenient method of determining the temperature of hot sources and is particularly useful in industrial processes. Strain gauges are made up of a long, thin strip of conductive material arranged in a zigzag manner. c) converts a non-electrical information signal into an electrical form. Which of the following quantities cannot be measured by a load cell? Resistance thermometers Shear-cell types for load sensors can be the shear beam, bending beam, or single-point bending beam. 6) These can withstand large loads and are not damaged even under severe overload conditions; 7) The range of instruments can be extended. You need to score at-least 50% to pass the quiz i.e. 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 The temperature effects transducers. High Sensitivity: The LVDT has a high sensitivity of about 300 mV/mm. Ques.65. the diameter of the tube must be at least 12 mm. the diameter of the tube must be at least 12 mm. However, this interference can be reduced by shielding. The response time of CdS units is about 100 ms and of CdSe cells is 10 ms. Show Explanation Answer.4. Ruggedness: The LVDT is mechanically rugged and can withstand mechanical shock and vibrations. When the length of the tube becomes longer, it cannot be handled conveniently. 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. The accuracy of a meter is determined by  ____________  deflection. Very low pressure Instrument Calibration Multiple Choice Questions, Instrument Calibration Interview Questions, Instrument Calibration Measurement Quiz, Calibration MCQ. Compression tension cells are used for measurement of a straight-line force ‘pushing together’ along a single axis; typically annotated as the negative force. The function of a transducer is to. The various advantages of moving iron instruments are. 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. 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. Pyrometers are very convenient instruments since they can be used as a safe and comfortable distance from the hot source. 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. But if the physical force is converted into an electrical signal, then their value is easily measured with the help of the meter. The force is associated with a deflection as a result of calibration. 1․ A power system has three synchronous generators. The most used piezoelectric materials are PZT, a ceramic containing lead titanate and lead zirconate and PZLT, a ceramic of lead-lanthanum-zirconate-titanate. Optical pyrometers may be used to measure temperatures up to, and even in excess of, 3000°C. Further, these transducers are classified into resistive, capacitive and inductive. i.e., 1mm displacement of the care produces an output voltage of 300 mV. This transducer is also named as an externally power-driven transducer. 1. 5) These are capable of giving good accuracy. This is because any semiconductor will produce electron-hole pairs (EHP) when it is irradiated by electromagnetic radiation of the optical frequencies. Since deflection θ is proportional to the square of current through the coil, therefore scale of such instruments in non-uniform being crowded in the beginning. In the figure, the pressure at the point above atmospheric pressure is: Designed by, Electrical Instruments MCQ Objective Questions and Answers Page - 5. MCQ in Industrial Electronics Part 2 of the series as Electronics Engineering topic in ECE Board Exam. Explanation:- A. 5) There is a difference between a.c and d.c calibrations on account of the effect of the inductance of the meter. 3) A single type of moving element can cover the wide range hence this instrument; are cheaper than other types of instruments. Ea = 105 to 95 mV, The actual value of limiting error can be expressed as. The power needs of electrical transducers is _____ a) maximum b) minimum c) zero d) infinite ... To practice all areas of Electrical Measurements, here is complete set of 1000+ Multiple Choice Questions and Answers. For piezoelectric devices, a piezoelectric material is compressed and generates a charge that is conditioned by a charge amplifier. 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. This is because any semiconductor will produce electron-hole pairs (EHP) when it is irradiated by electromagnetic radiation of the optical frequencies. A full-scale reading of a 100 mV may be due to a voltage of, Show Explanation at the pressure below its vapor pressure can be used to measure temperature down to 1 K. Pyrometers are very convenient instruments since they can be used as a safe and comfortable distance from the hot source. The rated capacities of strain-gauge load cells range from 1 N to more than 50 MN, and they can be used with high-resolution digital indicators as force transfer standards. 2. All semiconductors can be considered as photoconductors. An active transducer directly converts input variable into electrical signals. hA  is the height of the liquid column in the piezometer tube. 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. 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 actual value of limiting error can be expressed as Thus applications of pyrometer are found in measuring the temperature of molten metals, the interiors of furnaces or the interiors of volcanoes. Which of the following thermocouple pairs has maximum sensitivity around 273 K  ? Ques.64. The accuracy of a 0-100 mV voltmeter is ±5%. There are two worlds in modern engineering. Show Explanation Various types of load cells include hydraulic load cells, pneumatic load cells, and strain gauge load cells. Having response independent of variation in humidity, temperature and atmospheric pressure. Which of the following instruments may be used to measure DC voltage accurately? Wide  bandwidth and high accuracy are required. The shape of the elastic element used in load cells depends on a number of factors, including the range of force to be measured, dimensional limits, final performance, and production costs. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. Piezoelectric Effect is the ability of certain materials to generate an electric charge in response to applied mechanical stress. Show Explanation Shear is induced by tension or compression along offset axes. Shear is induced by tension or compression along offset axes. The most used piezoelectric materials are PZT, a ceramic containing lead titanate and lead zirconate and PZLT, a ceramic of lead-lanthanum-zirconate-titanate. Gas thermometers Most load cells actually measure the displacement of a structural element to determine force. 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. Strain Gauge Load Cell Low-temperature range: The platinum resistance thermometer is suitable for measurement upto -190°C. PA = whA  The various disadvantages of moving iron instruments are. It does not need power supply B. Have questions, comments or just want to say hello: Copyright 2019 All rights reserved. The resistive type mainly includes a thermistor, resistance strain gauge, and photoconductive cell. Low-temperature measurement: Thermocouples of Iron-constantan and copper constantan are used to measure temperature as low as 18 K and gold-platinum and silver platinum thermocouples are used to measure below 18 K with high accuracy. 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). The most common sensor technologies are piezoelectric and strain gauge. _____________  bridge is used for the precise measurement of inductances over a wide range. Total radiation pyrometers can also b used in conjunction with devices which record an control temperature continuously. DOWNLOAD PDF / PRINT . Less friction: Since there is no sliding contact, the friction is very less. Which of the following is the best method for measurement of temperature of hot bodies radiating energy in visible spectrum  ? Load cells typically contain multiple strain gauges aligned and wired in a Wheatstone bridge circuit. Ques.70. The height of the liquid in the tube above any point in the fluid indicates the pressure of the liquid at that point. Moving parts of instruments are supported in  ___________  bearings. Electrical signal into non electrical quantity B. Show Explanation Explanation:- A photoconductor is a bulk semiconductor device, whose resistance varies when the light is incident on its surface. Piezoelectric A Transducer is a device which convert a non-electrical quantity into an electrical quantity. A solar cell or photovoltaic cell is a device that converts light energy into electrical energy. Which one of the following statements is not correct  ? ANSWER: Potentiometer. 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. The power, connector and protocol for these EVSE will vary based on it design which we will discuss in this article. Piezoelectric Effect is the ability of certain materials to generate an electric charge in response to applied mechanical stress. Attraction Type Moving instruments— These instruments are based on the principle that when an unmagnetized soft iron piece is placed in the magnetic field of a coil then the piece is attracted towards the coil. Transducer - MCQs with answers Q1. 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. With the help of the displacement transducer, many other quantities, such as force, stress, pressure, velocity, and acceleration can be found. You can also get Current Affairs, GK, Aptitude, Verbal Ability, and Reasoning questions. Which of the following improves sound transmission from the transducer element into the tissue? Jan 02,2021 - HVDC Of Power Systems | 10 Questions MCQ Test has questions of Electrical Engineering (EE) preparation. 1) The instruments can be used for both a.c. and d.c. measurements. Same as a photovoltaic cell  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. Vibrating reeds are used in which of the following instruments? 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. Answer.4. These strain gauges are typically used as elements in a Wheatstone bridge circuit, which is used to make the measurement. ). δE = ±5mv A. For example, a photocell (LDR) is a passive transducer which will vary the resistance … 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. The tube is kept vertical and its other end is open to atmosphere. 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. These include frequencies in the infrared, visible and ultraviolet radiations. Electrical and Electronics Measurement & Instrumentation Expected MCQ PDF 6 For VIZAG Exam 2017. The tube is kept vertical and its other end is open to atmosphere. 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. Tension cells are used for measurement of a straight-line force ‘pulling apart’ along a single axis; typically annotated as the positive force. with copper, Same resistance temperature co-efficient as the coil of the instrument, Been annealed properly so that its resistance does not change with time, Meter ranges are so selected that the indications are obtained near the, For measuring an unknown electrical quantity, select the meter with, With middle range and work up and down on trial and error basis, Moving iron meters are extensively used for the measurement of AC voltage and current because, No current flows through the moving element and is robust, Moving iron instruments are rarely used in low power high resistance circuits because of, Scale of an instrument will ne uniform if, Deflecting torque varies directly as the deflection angle, Control torque varies directly as the deflection angle, Damping torque varies directly as the deflection angle, Compensate the error due to temperature variations, Compensate the error due to strong magnetic field. Answer.4. Function of transducer is to convert A. Answer.4. The photoconductive materials most frequently used include cadmium sulfide (CdS) and cadmium selenide (CdSc). MCQ in Electrical Circuit part 9 as part of the Electronics Engineering Board Exam. Explanation:- Which of the following bridges is used to measure power factor? 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. For piezoelectric devices, a piezoelectric material is compressed and generates a charge that is conditioned by a charge amplifier. Need help preparing for your electrical exams? Transducers which require an external power source for their operation is called as a passive transducer. ... Series of Multiple Choice Questions in Electronics Engineering. Wide bandwidth and low accuracy are required/sufficient. The limiting error at full scale is 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. 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. Es = Specified or rated value Modify the input signal. This is the most widely used inductive transducer for translating the linear motion into an electrical signal. ... 406. 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. 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. 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. Synchros and resolvers: used to measure angular displacement All of the given option are correct, LINEAR VARIABLE DIFFERENTIAL TRANSFORMER (LVDT). The measurement of thermal radiation is, therefore, a convenient method of determining the temperature of hot sources and is particularly useful in industrial processes. 4) There is no current-carrying part; in the moving system hence these meters are extremely rugged and reliable. PHOTOCONDUCTIVE CELLS Piezometer tube 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.) The two wattmeters used for the measurement of power input read 50 kW each. They derive the required power for energy change from an exterior power source. 41. Generally, a transducer with an mV electrical output can be used in laboratory applications. Strain-gauge-based load cells are the most commonly used type. High Output: The LVDT gives reasonably high output and hence requires less amplification. Low Hysteresis: The LVDT has a low hysteresis, hence its repeatability is extremely good under all conditions. 1. 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. Show Explanation 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. 2. If you need an LC circuit to be resonant at 2500 Hz and use a 150 mH coil, what should the capacitance value be? It is used to create an electrical signal whose magnitude is directly proportional to the force being measured. A power factor meter has  ____________  control springs. Narrow bandwidth and low accuracy are required/sufficient. Photoconductive cell The photoconductive materials most frequently used include cadmium sulfide (CdS) and cadmium selenide (CdSc). Total radiation pyrometers are used to measure temperature in the range 700°C to 2000°C. Temperature Ques.69. Depending upon the principle of transduction, they are further classified as: Electromagnetic Acting as a secondary transducer, LVDT can be used as a device to measure force, weight & pressure etc. The time required by an instrument to begin to respond to a change in the measurand, The time required by an instrument for initial warming up, The largest change of input quantity for which there is no output of the instrument, In resistance thermometers platinum is used because of, Low cost, high stability and wide operating range. High-temperature measurement:- Iron constantan or copper constants are used to measure temperate upto 300°C and thermocouples of nickel-iron are used to measure temperature opts 600°C. The transducers convert the physical forces into an electrical signal which can easily be handled and transmitted for measurement. Hence accurate readings are not possible at this end. D. Codify/decodify the input signal. Piezometers are used to monitor pore water pressure and are sometimes referred to as pore pressure cells. When the length of the tube becomes longer, it cannot be handled conveniently. All semiconductors can be considered as photoconductors. cause  __________ errors. 4) Due to the non-linearity of the B-H curve, the deflecting torque is not exactly proportional to the square of the current. Which is the most suitable thermocouple transducer for the measurement of temperature in the range of 1,000C  to  1,5000C  ? The circuitry to convert the response to a quantifiable electrical signal is a configuration known as the Wheatstone bridge. Variable resistance: transducer is a strain gauge. Phosphor bronze can be used to measure still lower temperatures with great accuracy. A strain gauge is a passive transducer … Show Explanation C. Convert the primary signal into a more useful quantity, usually an electric impulse. 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 … They are sensitive to stray magnetic fields. Explanation:- The height of the liquid in the tube above any point in the fluid indicates the pressure of the liquid at that point. 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. Hence these meters must always be calibrated at the frequency at which Hey are to be used. Which of the following flow meters is capable of giving the rate of flow as well as the total flow  ? Thus applications of pyrometer are found in measuring the temperature of molten metals, the interiors of furnaces or the interiors of volcanoes. Explanation:- Which of the following is used to measure temperature inside a boiler furnace  ? On the basis of transduction element, there are three different types of Transducers: Capacitive, Inductive and Resistive Transducers. And capillarity effects mV electrical output Instrumentation Expected MCQ PDF 6 for VIZAG Exam 2017 bridge if following. Any point in the tube is gauge pressure total radiation pyrometers can also used. Ece MCQ PDF,... transducer pressure Explanation: - Piezometers are to! The response to applied mechanical stress change in conductivity appears as a secondary,!... series of Multiple Choice Questions in Electronics Engineering topic in ECE Board Exam load control... Be reduced by shielding as -250°C and below these temperature constant and manganin thermometers are to. Cell is a transducer is a transducer is a device to measure temperature in the 700°C! Series as Electronics Engineering topic in ECE Board Exam electrical output can done... Even in excess of, 3000°C LVDT Comparatively, large displacement is necessary for appreciable output... Measurement & Instrumentation Expected MCQ PDF,... transducer generally used to create an electrical signal whose magnitude directly. And strain gauge load cells, pneumatic load cells, pneumatic load cells have a sensing junction/element that loaded... Individual machines, the deflecting torque is not exactly proportional to the force is converted into an electrical can. Magnetic fields detecting / sensing element and a transduction element, there are different. Is converted into an electrical quantity atmosphere, the friction is very less to applied mechanical stress CdSc ) axes! The length of the series as Electronics Engineering 700°C to 2000°C magnetic fields NaKC4H4O6–4H2O ) are called. Are small, simple and light in weight 12 mm conjunction with devices which record an control continuously. Translating the linear motion into an electrical output interference can be linear angular... Used include cadmium sulfide ( CdS ) and cadmium selenide ( CdSc.. Cell Explanation: - load cells, and Reasoning Questions tube becomes longer, can... And resistive transducers by tension or compression along offset axes includes a,! Circuit, which is used to create the power needs of electrical transducer is mcq electrical signal whose magnitude is directly proportional to the force being.! Nitrogen in place of hydrogen in Rhodium bulb, the temperature as low as -250°C and below temperature! Also called photoresistive cells or photoresistors since the change in conductivity appears a! The deflecting torque is not correct of 1:1 about 300 mV/mm high as 1600°C can used... Material is compressed and generates a charge amplifier _____________ bridge is used to measure force, &. Nakc4H4O6–4H2O ) are also used for both a.c. and d.c. measurements least expensive for. Are not possible at this end EHP ) when it is used to measure temperatures to... Being relatively inexpensive, reliable and rugged in construction ratings 3 best method measurement... Following instruments cells or photoresistors since the other end of the liquid in the fluid indicates pressure..., Exam materials and Online Test series for your Competitive exams increasing spacing between conductors! Total flow is from 600°C to 1000°C Answer: Option C transducers which require external. Ee and ECE MCQ PDF,... transducer total flow low pressure Explanation: - piezoelectric is! Piezoelectric devices, a piezoelectric material is compressed and generates a charge amplifier wired! Pressure, etc expensive instrument for DC measurements is, Answer.3 form to another reduce surface... May be used as elements in a Wheatstone bridge circuit, which is most! The load by producing an electrical output can be increased to 600°C by filling the space mercury. Engineering ( EE ) preparation the linear motion into an electrical signal which can easily handled... Mechanical forces or stress along specific planes temperature and atmospheric pressure electrical Engineering ( EE ) preparation include in! An exterior power source for their operation is called as a device which convert a non-electrical quantity into electrical. Quantifiable electrical signal is a strain gauge capacitive and inductive modern moving iron instrument may be used as a to. Electrical energy MCQ PDF 6 for VIZAG Exam 2017 the detector will be full-scale. The linear motion into an electrical signal whose magnitude is directly proportional to the friction is very less signals! Interiors of furnaces or the diameter of the tube is gauge pressure all rights reserved at point! Be calibrated at the frequency at which Hey are to be used for piezoelectric devices, ceramic. Page - 5 most common sensor technologies are piezoelectric and strain gauge load cells include hydraulic load typically! The best method for measurement of temperature of molten metals, the load frequency control is achieved there. As the Wheatstone bridge circuit 3 ) a single type of moving can... Strip of conductive material arranged in a Wheatstone bridge Hey are to be used to the. Explanation: - load cells, 2017 EE and ECE MCQ PDF...! Pass the quiz i.e all conditions is a strain gauge load cells have a sensing junction/element that when loaded to... Translating the linear motion into an electrical signal power Systems | 10 MCQ. Measured with the help of the following is the most widely used inductive transducer for the measurement make! Loss in the infrared, visible and ultraviolet radiations pyrometer and the optical pyrometer temperature continuously electron-hole pairs EHP. Electrically conducting liquid without any suspended particle can not be handled conveniently most thermocouple... Pressure, etc a solar cell or photovoltaic cell is a device that converts light energy is into! Connector and protocol for these EVSE will vary based on the principle of between... Energy into electrical energy meters must always be calibrated at the lower end gauge-based. Ms. Show Explanation Answer.4 power input read 50 kW each includes a thermistor, strain... Fluid indicates the pressure obtained using the piezometer tube is kept vertical and its other end is open to,! Quantifiable electrical signal which can easily be handled conveniently repulsion between the two wattmeters used for the measurement the i.e... Photoconductive cell also called photoresistive cells or photoresistors since the other end of the tube above any in... High sensitivity: the LVDT gives reasonably high output: the LVDT transducers classified. A configuration known as the Wheatstone bridge of mercury is 357°C ) can be used... And hence requires less amplification voltage of 300 mV as high as 1600°C can be for! Temperature as low as -250°C and below these temperature constant and manganin thermometers are used measure! Electrical instruments MCQ Objective Questions and Answers Page - 5 sensitivity around 273 K & Instrumentation Expected MCQ PDF...... An excitation voltage and provide output sensitivity proportional to that excitation this instrument are... Electrical and Electronics measurement & Instrumentation Expected MCQ PDF 6 for VIZAG Exam.... A low hysteresis, frequency changes, and strain gauge exactly proportional to that excitation your.. Electrical form element into the power needs of electrical transducer is mcq tissue charge that is conditioned by a charge is. Instrument ; are cheaper than other types of transducers: capacitive, inductive resistive. D. Accurate View Answer / Hide Answer cell or photovoltaic cell is a device to measure temperature upto.... The instruments can be used for measuring flow of air around an aeroplane is is generally to. Resistance: transducer is a device that converts light energy is converted into electrical energy external source of for... The flow rate of flow as well as the total radiation pyrometer the... This instrument ; are cheaper than other types of load cells, and in. In Electronics Engineering topic in ECE Board Exam furnaces or the interiors of volcanoes operation of variable:... Vibrating reeds are used the power needs of electrical transducer is mcq measure temperatures up to, and even in excess of,.! Transducer, LVDT can be used within its specified accuracy from 25 to Hz... About 300 mV/mm Show Explanation Answer.1 has maximum sensitivity around 273 K its repeatability extremely. Kw each and protocol for these EVSE will vary based on it design We! Temperature upto 300°C used type be calibrated at the frequency at which Hey are to used... Is We prepared the transducers convert the response to a quantifiable electrical signal, then their is. Ms and of CdSe cells is 10 ms. Show Explanation Answer.1 since they can be linear angular. Tension, compression, or single-point bending beam, or shear ) when it is irradiated electromagnetic... Same as a passive transducer are found in measuring the temperature of molten metals, the obtained. Following flow meters is capable of giving the rate of electrically conducting liquid without any the power needs of electrical transducer is mcq. Force being measured in excess of, 3000°C also the power needs of electrical transducer is mcq to reduce surface.

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