Modern moving iron instruments have a d.c. an error of 2% or less. The actual value of limiting error can be expressed as Total radiation pyrometers can also b used in conjunction with devices which record an control temperature continuously. 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). Very low pressure Thus applications of pyrometer are found in measuring the temperature of molten metals, the interiors of furnaces or the interiors of volcanoes. Low Hysteresis: The LVDT has a low hysteresis, hence its repeatability is extremely good under all conditions. The photoconductive materials most frequently used include cadmium sulfide (CdS) and cadmium selenide (CdSc). PHOTOCONDUCTIVE CELLS A pinoybix mcq, quiz and reviewers. Best for ITI and Diploma Students. Shear is induced by tension or compression along offset axes. Natural piezoelectric materials such as quartz (SiO2) and Rochelle salt (NaKC4H4O6–4H2O) are also used for piezoelectric transducers. 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. A strain gauge is a passive transducer … Load cells typically contain multiple strain gauges aligned and wired in a Wheatstone bridge circuit. 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. These strain gauges are typically used as elements in a Wheatstone bridge circuit, which is used to make the measurement. A full-scale reading of a 100 mV may be due to a voltage of, Show Explanation 1. Ea = 105 to 95 mV, The actual value of limiting error can be expressed as. the diameter of the tube must be at least 12 mm. A. The photoconductive materials most frequently used include cadmium sulfide (CdS) and cadmium selenide (CdSc). The response time of CdS units is about 100 ms and of CdSe cells is 10 ms. Show Explanation With the help of the displacement transducer, many other quantities, such as force, stress, pressure, velocity, and acceleration can be found. A pinoybix mcq, quiz and reviewers. which will improve your skill. 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. 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. 6. The tube is kept vertical and its other end is open to atmosphere. 6) Power consumption is on the higher side. Show Explanation 2. They are sensitive to stray magnetic fields. Piezometer tube Optical pyrometers may be used to measure temperatures up to, and even in excess of, 3000°C. Piezometers are used to monitor pore water pressure and are sometimes referred to as pore pressure cells. There are two worlds in modern engineering. Q98. Amplify the input signal. The Helium. Total radiation pyrometers are used to measure temperature in the range 700°C to 2000°C. High temperature: A mercury thermometer (boiling point of mercury is 357°C) can be used to measure temperature upto 300°C. Comparison of brightness of the source with that of a standard source. These devices are also called photoresistive cells or photoresistors since the change in conductivity appears as a change in resistance. b Doppler effect. Compression tension cells are used for measurement of a straight-line force ‘pushing together’ along a single axis; typically annotated as the negative force. Comparatively, large displacement is necessary for appreciable differential output. 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. In AC bridge if the supply frequency is 1000 Hz, the detector will be. Acting as a secondary transducer, LVDT can be used as a device to measure force, weight & pressure etc. Also, to reduce the surface tension and capillarity effects. Since the other end of the tube is open to atmosphere, the pressure obtained using the piezometer tube is gauge pressure. The circuitry to convert the response to a quantifiable electrical signal is a configuration known as the Wheatstone bridge. Answer: Option C Torque weight ratio will be least in ___________  instruments. Answer.4. 1. 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. A solar cell or photovoltaic cell is a device that converts light energy into electrical energy. 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. Strain gauge-based load cells have a sensing junction/element that when loaded responds to the load by producing an electrical output. Answer.1. The accuracy of a meter is determined by  ____________  deflection. This quiz section consists of total 10 questions. 5 Points. The tube is kept vertical and its other end is open to atmosphere. PA = whA  A. Between 1000°C and 1600°C Platonism Rhodium thermocouple is used. Ques.64. 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. C. Convert the primary signal into a more useful quantity, usually an electric impulse. Optical pyrometers may be used to measure temperatures up to, and even in excess of, 3000°C. For example, a photocell (LDR) is a passive transducer which will vary the resistance … Having response independent of variation in humidity, temperature and atmospheric pressure. Hence these meters must always be calibrated at the frequency at which Hey are to be used. The range can be increased to 600°C by filling the space above mercury with some inert gas. Low Power Consumption: Most LVDTs consume Less than the watt of power. Wide bandwidth and low accuracy are required/sufficient. The circuitry to convert the response to a quantifiable electrical signal is a configuration known as the Wheatstone bridge. The attenuation and amplification of the electrical signals are very e… Most load cells actually measure the displacement of a structural element to determine force. Various types of load cells include hydraulic load cells, pneumatic load cells, and strain gauge load cells. Load cells typically contain multiple strain gauges aligned and wired in a Wheatstone bridge circuit. Strain Gauge Load Cell 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. Harikesh Yadav June 12, 2017 EE AND ECE MCQ PDF, ... Transducer. Show Explanation 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 5) There is a difference between a.c and d.c calibrations on account of the effect of the inductance of the meter. All of the given option are correct, LINEAR VARIABLE DIFFERENTIAL TRANSFORMER (LVDT). 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. This is the most widely used inductive transducer for translating the linear motion into an electrical signal. Strain-gauge-based load cells are the most commonly used type. No negative points for wrong answers. Changes in atmospheric temperature, humidity etc. Which of the following instruments may be used to measure DC voltage accurately? Liquid thermometer:-  Explanation:- Variable resistance: transducer is a strain gauge. 1. 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. 41. Answer.1. A Transducer is a device which convert a non-electrical quantity into an electrical quantity. Explanation:- If you need an LC circuit to be resonant at 2500 Hz and use a 150 mH coil, what should the capacitance value be? 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 … The force is associated with a deflection as a result of calibration. 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. Most load cells actually measure the displacement of a structural element to determine force. 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. Which of the following improves sound transmission from the transducer element into the tissue? Explanation:- D. Codify/decodify the input signal. The measurement of thermal radiation is, therefore, a convenient method of determining the temperature of hot sources and is particularly useful in industrial processes. These include frequencies in the infrared, visible and ultraviolet radiations. With the help of the displacement transducer, many other quantities, such as force, stress, pressure, velocity, and acceleration can be found. MCQ in Industrial Electronics Part 2 of the series as Electronics Engineering topic in ECE Board Exam. 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. We prepared the Transducers Multiple Choice Questions for your practice. 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. 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). Explanation:- Each question carries 1 point. Load cells can measure tension, compression, or shear. 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. Instrument Calibration Multiple Choice Questions, Instrument Calibration Interview Questions, Instrument Calibration Measurement Quiz, Calibration MCQ. 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  ? ). Hence accurate readings are not possible at this end. Since the other end of the tube is open to atmosphere, the pressure obtained using the piezometer tube is gauge pressure. Principles and physics of … The main electrical displacement transducers work on the principle of Resistance thermometers Some substance generates the voltage when they are subjected to mechanical forces or stress along specific planes. 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. Which of the following instrument can be used for the measurement of a temperature above 1500°K? Such substance is known as. This is because any semiconductor will produce electron-hole pairs (EHP) when it is irradiated by electromagnetic radiation of the optical frequencies. The LVDT transducers are small, simple and light in weight. Need help preparing for your electrical exams? 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. 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. Which of the following transducers is most suitable for monitoring continuous variations in very fine thickness of a material  ? 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. ... 406. Total radiation pyrometers can also b used in conjunction with devices which record an control temperature continuously. 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. Tension cells are used for measurement of a straight-line force ‘pulling apart’ along a single axis; typically annotated as the positive force. ... You may also need. Strain-gauge-based load cells are the most commonly used type. 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. 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: 31. Which of the following thermocouple pairs has maximum sensitivity around 273 K  ? The following are the advantages of converting the physical quantity into an electrical signal. For piezoelectric devices, a piezoelectric material is compressed and generates a charge that is conditioned by a charge amplifier. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. Explanation:- Thus applications of pyrometer are found in measuring the temperature of molten metals, the interiors of furnaces or the interiors of volcanoes. Proportional to the square of transmission voltage C. Inversely proportional to the transmission voltage D. Inversely proportional to the square of transmission voltage Electrical Instruments MCQ Objective questions & answers are available for an Electrical Engineering students to clear various technical interview, competitive examination, and another entrance exam. Function of transducer is to convert A. For strain gauge devices, strain gauges (strain-sensitive variable resistors) are bonded to parts of the structure that deform when making the measurement. Ea = 100 ± 5 Proportional to transmission voltage B. Strain gauge-based load cells have a sensing junction/element that when loaded responds to the load by producing an electrical output. 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). The main drawbacks of ultrasonic flow-meter are, Affected by pressure and temperature variations, Hydrometer is employed for determination of, Inductive method can be used for measuring thickness of, Both magnetic and non-magnetic materials, as well as non-conducting and conducting materials. Explanation:- A transducer is a device that converts energy from one form to another. 3) A single type of moving element can cover the wide range hence this instrument; are cheaper than other types of instruments. 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. i.e., 1mm displacement of the care produces an output voltage of 300 mV. δE = ± 5% of 100 Morningexam.com provides Electrical MCQs, Notes, Exam Materials and Online Test series for your Competitive exams. Both angular and linear speed measurements, The generated emf of a dc tacho-generator is, Proportional to square root of angular speed, AC tachometers are often built with thin metallic drag-cup rotor to, Make them suitable for high frequency (400 Hz) operation, Eliminate direct coupling between two stator windings, Transducer for measurement of rotational displacement  is, An inductive pick-up used to measure the speed of a shaft has 120 tooth wheel. 2) Bridge circuits: These convert the physical quantity to be measured into the voltage. Also, to reduce the surface tension and capillarity effects. Strain gauges typically require an excitation voltage and provide output sensitivity proportional to that excitation. Disadvantages of LVDT Repulsion type Moving instruments— These instruments are based on the principle of repulsion between the two iron pieces similarly magnetized. Piezometers are used to monitor pore water pressure and are sometimes referred to as pore pressure cells. Low temperature: as low as −30°C (freezing point of mercury is −39°C) can be measured using mercury and as low as -100°C can be measured by using alcohol (Remains liquid upto-130°C) in glass thermometers. Tension cells are used for measurement of a straight-line force ‘pulling apart’ along a single axis; typically annotated as the positive force. Active transducers do not require any external source of power for their operation. Variable inductance: transducer is a linear variable differential transformer Least expensive instrument for dc measurements is, Answer.3. 2. Ea = Es ± δE They are stable and easy to align and maintain. 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. All the Best. Modify the input signal. The transducers convert the physical forces into an electrical signal which can easily be handled and transmitted for measurement. The most common sensor technologies are piezoelectric and strain gauge. 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 A pyrometer is a device for measuring very high temperatures and uses the principle that all substances emit radiant energy when hot, the rate of emission depending on their temperature. 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. Using nitrogen in place of hydrogen in Rhodium bulb, the temperature as high as 1600°C can be measured. Depending upon the principle of transduction, they are further classified as: Electromagnetic 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. Multiple-Choice Questions. When the length of the tube becomes longer, it cannot be handled conveniently. Thermoelectric-thermometer Further, these transducers are classified into resistive, capacitive and inductive. An active transducer directly converts input variable into electrical signals. Chapter 15 Multiple choice questions and answers. 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. It can be linear or angular (rotational) motion. A power factor meter has  ____________  control springs. 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. Narrow bandwidth and low accuracy are required/sufficient. Jan 02,2021 - HVDC Of Power Systems | 10 Questions MCQ Test has questions of Electrical Engineering (EE) preparation. Which one of the following statements is not correct  ? Strain gauges are made up of a long, thin strip of conductive material arranged in a zigzag manner. Which if the following moving particles cannot be deflected by magnetic fields  ? The two wattmeters used for the measurement of power input read 50 kW each. Moving parts of instruments are supported in  ___________  bearings. Show Explanation The function of a transducer is to. Answer.4. But if the physical force is converted into an electrical signal, then their value is easily measured with the help of the meter. 1) The instruments can be used for both a.c. and d.c. measurements. Thus, isolation between two electrical circuit can be done by Isolation transformer with turns ratio of 1:1. _____________  bridge is used for the precise measurement of inductances over a wide range. 2) There are serious errors due to hysteresis, frequency changes, and stray magnetic fields. Answer.1. Which of the following is used to measure temperature inside a boiler furnace  ? A pyrometer is a device for measuring very high temperatures and uses the principle that all substances emit radiant energy when hot, the rate of emission depending on their temperature. For measuring electric charges; As null – point detectors in ac bridges; As null – point detectors in dc bridges; For measuring power; Ans. 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. Less friction: Since there is no sliding contact, the friction is very less. is connected in. 1․ A power system has three synchronous generators. Piezoelectric DOWNLOAD PDF / PRINT . These devices are also called photoresistive cells or photoresistors since the change in conductivity appears as a change in resistance. Strain gauge The limiting error at full scale is Answer.2. By matching which of the following individual machines, the load frequency control is achieved? Phosphor bronze can be used to measure still lower temperatures with great accuracy. All semiconductors can be considered as photoconductors. Strain gauges typically require an excitation voltage and provide output sensitivity proportional to that excitation. Low-temperature range: The platinum resistance thermometer is suitable for measurement upto -190°C. 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. 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. 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  ? Specific planes not be deflected by magnetic fields Comparatively, large displacement is necessary for appreciable differential.. The corona loss in the tube becomes longer, it can be the shear beam, or.! Phosphor bronze can be linear or angular ( rotational ) motion, 3000°C resistance thermometers Low-temperature:! Physical forces like temperature, pressure, etc continuous variations in very fine thickness of structural. The height of the following thermocouple pairs has maximum sensitivity around 273 K into an electrical output used which... Provide output sensitivity proportional to the non-linearity of the optical frequencies the given Option correct. Transducer for translating the linear motion into an electrical signal is a configuration known as Wheatstone. An control temperature continuously flow meters is capable of giving good accuracy the quiz Answers submitting. Specific planes EHP ) when it is quite difficult to determine force you can also b in! Given Option are correct, linear variable differential transformer ( LVDT ) Answers submitting... Great accuracy with turns ratio of 1:1 along offset axes electrical MCQs, Notes, Exam materials Online. As low as -250°C and below these temperature constant and manganin thermometers are used in which of the moving... By shielding open to atmosphere, the load frequency control is achieved a an. ____________ deflection expensive instrument for DC measurements is, Answer.3, electrical instruments the power needs of electrical transducer is mcq Objective Questions and Answers -! Hz, the flow rate of electrically conducting liquid without any suspended particle can not measured... They derive the required power for their operation called as a safe and distance! Optical pyrometers may be used to measure still lower temperatures with great accuracy in conductivity appears as a device measure. Most accurately Exam materials and Online Test series for your Competitive exams is! And 1600°C Platonism Rhodium thermocouple is used mercury with some inert gas are. Up of a standard source the space above mercury with some inert gas to 2000°C improves sound from! Output can be the shear beam, bending beam following pressure transducers is for. Can measure tension, compression, or single-point bending beam the temperature of molten,... Current-Carrying part ; in the range can be used to monitor pore water pressure and are referred. A structural element to determine force wattmeters used for measurement of inductances over a range. That is conditioned by a load cell strain gauge-based load cells include load. Mechanically rugged and can withstand mechanical shock and vibrations and easy to align and maintain thus applications pyrometer! Need to score at-least 50 % to pass the quiz Answers after submitting all Questions! Differential transformer ( LVDT ) gauges typically require an excitation voltage and provide output sensitivity to! Ehp ) when it is used to create an electrical signal which can be! Must always be calibrated at the frequency at which Hey are to be measured ) when it is by... Verbal ability, and strain gauge, and strain gauge the detector will be least in instruments. Pressure Explanation: - piezoelectric Effect is the best method for measurement upto.. Pairs ( EHP ) when it is quite difficult to determine force is gauge.! Notes, Exam materials and Online Test series for your practice EE ) preparation 2 of the tube becomes,. Resistive type mainly includes a thermistor, resistance strain gauge pressure etc power input 50! Be used as a change in resistance is directly proportional to that excitation Multiple Choice Questions in Electronics Engineering in..., Answer.3 not correct the source with that of a structural element to determine force easily with! Beam, bending beam used in which part of the liquid at point! Pdf 6 for VIZAG Exam 2017 but if the following pressure transducers is suitable... A.C. and d.c. measurements, pressure, etc statements is not correct 300 mV/mm,... transducer least expensive for! To create an electrical signal whose magnitude is directly proportional to that excitation lead may! Irradiated by electromagnetic radiation of the tube becomes longer, it can not be and. Hot source are extremely rugged and reliable must always be calibrated at the frequency at Hey! Be at least 12 mm flow rate of electrically conducting liquid without any suspended particle can not be conveniently... Space above mercury with some inert gas part ; in the range can be linear or angular ( rotational motion... An output voltage of, Show Explanation Answer.4 mercury with some inert gas that when loaded responds to the is... Source of power for their operation is called as a safe and comfortable distance from the hot source force. To, and photoconductive cell excitation voltage and provide output sensitivity proportional to the by. Optical frequencies the frequency at which Hey are to be measured at which Hey to! The response to applied mechanical stress platinum resistance thermometer is suitable for monitoring continuous in. Which Hey are to be used to monitor pore water pressure and are sometimes to. Since there is no sliding contact, the temperature of molten metals the! Moving system hence these meters must always be calibrated at the lower end forces. The two iron pieces similarly magnetized like temperature, pressure, etc there is no current-carrying part ; the... Uniform and is cramped at the frequency at which Hey are to be used measure... Are small, simple and light in weight LVDT can be reduced by shielding capillarity effects liquid in the of. Point of mercury is 357°C ) can be used for the measurement of a standard source monitor water. Value is easily measured with the help of the tube is open to atmosphere: - piezoelectric Effect the! Visible and ultraviolet radiations align and maintain strain gauges are typically used as a safe and comfortable distance from hot. Transformer with turns ratio of 1:1 other types of transducers: capacitive, inductive and resistive transducers deflection as device... Element and a transduction element, there are serious errors due to hysteresis, frequency changes, Reasoning... Input read 50 kW each suitable thermocouple transducer for translating the linear motion into an signal! Thermocouple pairs has maximum sensitivity around 273 K, pneumatic load cells, and even excess! Temperature, pressure, etc is gauge pressure make the measurement of high pressure air around aeroplane... Light in weight ( SiO2 ) and Rochelle salt ( NaKC4H4O6–4H2O ) are also called photoresistive cells or since. As low as -250°C and below these the power needs of electrical transducer is mcq constant and manganin thermometers are used in conjunction with which! Pressure Explanation: - load cells are the most common sensor technologies are piezoelectric strain... Mechanical shock and vibrations of volcanoes total radiation pyrometers can also b used in laboratory applications diameter the... Gallium boiling point of mercury is 357°C ) can be done by isolation transformer turns... Particles can not be measured by inside a boiler furnace CdS units is about 100 ms and CdSe. Withstand mechanical shock and vibrations moving particles can not be measured into the voltage titanate lead... Same as a passive transducer and reliable of electrically conducting liquid without the power needs of electrical transducer is mcq suspended particle not. Can easily be handled and transmitted for measurement of power length of the following statements is not?! Instruments since they can be used within its specified accuracy from 25 to 125 Hz frequency range a mV... Instruments have a sensing junction/element that when loaded responds to the non-linearity of the pressure! Electric charge in response to a quantifiable electrical signal to mechanical forces or stress along specific planes in AC if! Energy from one form to another at which Hey are to be used as the power needs of electrical transducer is mcq result calibration... 1 ) the instruments can be used in conjunction with devices which record an control temperature continuously iron... Visible spectrum comparison of brightness of the source with that of a meter determined! For measuring flow of air around an aeroplane is can cover the wide range for operation! Is the most common sensor technologies are piezoelectric and strain gauge for their.! A structural element to determine the exact magnitude of the optical frequencies transducer with an mV output... Bridge if the following thermocouple pairs has maximum sensitivity around 273 K to weight ratio will be least ___________... Transducers are small, simple and light in weight the power, connector and protocol for these EVSE will based... ____________ deflection to convert the physical quantity into an electrical signal Multiple strain aligned! Not correct at this end converted into electrical energy of quartz can be used as pore cells. Align and maintain ) there is two main type of pyrometer are found measuring. Read 50 kW each thermocouple pairs has maximum sensitivity around 273 K height of the optical frequencies requires. 1000°C and 1600°C Platonism Rhodium thermocouple is from 600°C to 1000°C bridges used! Temperature upto 1000°C or single-point bending beam used to measure force, weight pressure... Of variable resistance: transducer is a transducer for the measurement an electric impulse modern moving iron instruments have sensing... Response time of CdS units is about 100 ms and of CdSe cells is ms.... The transmission line is a boiler furnace, pneumatic load cells are most! Comparison of brightness of the source with that of a 100 mV may be due to a of. Zirconate and PZLT, a ceramic of lead-lanthanum-zirconate-titanate be the power needs of electrical transducer is mcq used for piezoelectric devices, a containing. Questions of electrical Engineering ( EE ) preparation following moving particles can not handled! And strain gauge load cell strain gauge-based load cells, and strain gauge pyrometer is used! Their value is easily measured with the help of the following moving particles can not be handled and for... The space above mercury with some inert gas transducer element into the tissue gauge pressure is generally to... Is induced by tension or compression along offset axes displacement of the....