The various advantages of moving iron instruments are. Electrical Instruments MCQ Objective questions & answers are available for an Electrical Engineering students to clear various technical interview, competitive examination, and another entrance exam. 5 Points. Depending upon the principle of transduction, they are further classified as: Electromagnetic Hence accurate readings are not possible at this end. 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. Variable inductance: transducer is a linear variable differential transformer Disadvantages of LVDT Which of the following is the best method for measurement of temperature of hot bodies radiating energy in visible spectrum  ? 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. These include frequencies in the infrared, visible and ultraviolet radiations. 2. cause  __________ errors. All of the given option are correct δE = ± 5% of 100 The transducers convert the physical forces into an electrical signal which can easily be handled and transmitted for measurement. Piezometers are used to monitor pore water pressure and are sometimes referred to as pore pressure cells. Which of the following is used to measure temperature inside a boiler furnace  ? ANSWER: Potentiometer. The attenuation and amplification of the electrical signals are very e… 2. These include frequencies in the infrared, visible and ultraviolet radiations. A. Show Explanation 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: The accuracy of a meter is determined by  ____________  deflection. The usual commercial moving iron instrument may be used within its specified accuracy from 25 to 125 Hz frequency range. 1) The scale of the moving iron instruments is not uniform and is cramped at the lower end. 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. 2. It comprises of a detecting / sensing element and a transduction element. Electrical and Electronics Measurement & Instrumentation Expected MCQ PDF 6 For VIZAG Exam 2017. The measurement range of nickel-nichrome thermocouple is from 600°C to 1000°C. The height of the liquid in the tube above any point in the fluid indicates the pressure of the liquid at that point. Strain gauges typically require an excitation voltage and provide output sensitivity proportional to that excitation. Shear-cell types for load sensors can be the shear beam, bending beam, or single-point bending beam. 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. For example photovoltaic cell in which light energy is converted into electrical energy. The circuitry to convert the response to a quantifiable electrical signal is a configuration known as the Wheatstone bridge. Best for ITI and Diploma Students. 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. 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. Shear-cell types for load sensors can be the shear beam, bending beam, or single-point bending beam. Active transducers do not require any external source of power for their operation. The most used piezoelectric materials are PZT, a ceramic containing lead titanate and lead zirconate and PZLT, a ceramic of lead-lanthanum-zirconate-titanate. Most load cells actually measure the displacement of a structural element to determine force. Applications of LVDT Which of the following thermocouple pairs has maximum sensitivity around 273 K  ? Q98. A solar cell or photovoltaic cell is a device that converts light energy into electrical energy. Wide bandwidth and low accuracy are required/sufficient. 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. 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). Strain gauge-based load cells have a sensing junction/element that when loaded responds to the load by producing an electrical output. Comparatively, large displacement is necessary for appreciable differential output. Which of the following quantities cannot be measured by a load cell? Explanation:- Compression tension cells are used for measurement of a straight-line force ‘pushing together’ along a single axis; typically annotated as the negative force. Load cells can measure tension, compression, or shear. Transducer - MCQs with answers Q1. It can be linear or angular (rotational) motion. Strain gauges are made up of a long, thin strip of conductive material arranged in a zigzag manner. Answer.4. Which of the following instrument can be used for the measurement of a temperature above 1500°K? Piezoelectric Effect is the ability of certain materials to generate an electric charge in response to applied mechanical stress. Wide  bandwidth and high accuracy are required. The Helium. Load cells typically contain multiple strain gauges aligned and wired in a Wheatstone bridge circuit. Load cells typically contain multiple strain gauges aligned and wired in a Wheatstone bridge circuit. A lead thermometer may be used to measure temperature as low as -250°C and below these temperature constant and manganin thermometers are used. Further, these transducers are classified into resistive, capacitive and inductive. Show Explanation Attraction type moving instrument. δE = ±5mv The most common sensor technologies are piezoelectric and strain gauge. Strain Gauge Load Cell Designed by, Electrical Instruments MCQ Objective Questions and Answers Page - 5. Where Optical pyrometers may be used to measure temperatures up to, and even in excess of, 3000°C. High Output: The LVDT gives reasonably high output and hence requires less amplification. Gas thermometers They are sensitive to stray magnetic fields. 5) These are capable of giving good accuracy. hA  is the height of the liquid column in the piezometer tube. Answer.1. 1) The instruments can be used for both a.c. and d.c. measurements. 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. where 2) The torque to weight ratio is high, errors due to the friction are very less. Pyrometers are very convenient instruments since they can be used as a safe and comfortable distance from the hot source. Total radiation pyrometers can also b used in conjunction with devices which record an control temperature continuously. Ques.65. Which is the most suitable thermocouple transducer for the measurement of temperature in the range of 1,000C  to  1,5000C  ? The force is associated with a deflection as a result of calibration. For piezoelectric devices, a piezoelectric material is compressed and generates a charge that is conditioned by a charge amplifier. 3) A single type of moving element can cover the wide range hence this instrument; Comparatively, large displacement is necessary for appreciable differential output. Very low pressure Strain gauges are made up of a long, thin strip of conductive material arranged in a zigzag manner. Function of transducer is to convert A. Moving parts of instruments are supported in  ___________  bearings. Answer.1. The dynamic response is limited. You can get the Quiz Answers after submitting all quiz questions. We prepared the Transducers Multiple Choice Questions for your practice. 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. For measuring electric charges; As null – point detectors in ac bridges; As null – point detectors in dc bridges; For measuring power; Ans. 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. Strain-gauge-based load cells are the most commonly used type. 1. The response time of CdS units is about 100 ms and of CdSe cells is 10 ms. Show Explanation Having response independent of variation in humidity, temperature and atmospheric pressure. Pyrometers are very convenient instruments since they can be used as a safe and comfortable distance from the hot source. They are sensitive to stray magnetic fields. B. Shear is induced by tension or compression along offset axes. Answer.4. Reactive power Turbine inputs Generated voltage Turbine and generator ratings 3. No negative points for wrong answers. These strain gauges are typically used as elements in a Wheatstone bridge circuit, which is used to make the measurement. The most used piezoelectric materials are PZT, a ceramic containing lead titanate and lead zirconate and PZLT, a ceramic of lead-lanthanum-zirconate-titanate. 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. Which of the following improves sound transmission from the transducer element into the tissue? 2) Bridge circuits: These convert the physical quantity to be measured into the voltage. Morningexam.com provides Electrical MCQs, Notes, Exam Materials and Online Test series for your Competitive exams. ... You may also need. Comparison of brightness of the source with that of a standard source. a Matching layer. 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. 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. 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. Multiple-Choice Questions. Generally, a transducer with an mV electrical output can be used in laboratory applications. They are stable and easy to align and maintain. High Sensitivity: The LVDT has a high sensitivity of about 300 mV/mm. There is two main type of pyrometer, namely the total radiation pyrometer and the optical pyrometer. LINEAR VARIABLE DIFFERENTIAL TRANSFORMER (LVDT) 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. Es = Specified or rated value For piezoelectric devices, a piezoelectric material is compressed and generates a charge that is conditioned by a charge amplifier. ... Series of Multiple Choice Questions in Electronics Engineering. 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. Strain gauge-based load cells have a sensing junction/element that when loaded responds to the load by producing an electrical output. These devices are also called photoresistive cells or photoresistors since the change in conductivity appears as a change in resistance. This is because any semiconductor will produce electron-hole pairs (EHP) when it is irradiated by electromagnetic radiation of the optical frequencies. Show Explanation 31. 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. 5) There is a difference between a.c and d.c calibrations on account of the effect of the inductance of the meter. 1. A load cell is a transducer. Modern moving iron instruments have a d.c. an error of 2% or less. 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). Liquid thermometer:-  Since the other end of the tube is open to atmosphere, the pressure obtained using the piezometer tube is gauge pressure. Explanation:- 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. Acting as a secondary transducer, LVDT can be used as a device to measure force, weight & pressure etc. The photoconductive materials most frequently used include cadmium sulfide (CdS) and cadmium selenide (CdSc). Explanation:- Electrical signal into non electrical quantity B. 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 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. 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). 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. The main electrical displacement transducers work on the principle of. Total radiation pyrometers are used to measure temperature in the range 700°C to 2000°C. Harikesh Yadav June 12, 2017 EE AND ECE MCQ PDF, ... Transducer. Compression tension cells are used for measurement of a straight-line force ‘pushing together’ along a single axis; typically annotated as the negative force. Ea = 100 ± 5 ). Natural piezoelectric materials such as quartz (SiO2) and Rochelle salt (NaKC4H4O6–4H2O) are also used for piezoelectric transducers. Total radiation pyrometers can also b used in conjunction with devices which record an control temperature continuously. Narrow bandwidth and high accuracy are required. Changes in atmospheric temperature, humidity etc. Variable resistance: transducer is a strain gauge. Which of the following bridges is used to measure power factor? 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. The actual value of limiting error can be expressed as Proportional to the square of transmission voltage C. Inversely proportional to the transmission voltage D. Inversely proportional to the square of transmission voltage Answer: Option C Non electrical quantity into electrical signal C. Electrical signal into mechanical quantity D. All of these View Answer / Hide Answer Least expensive instrument for dc measurements is, Answer.3. The tube is kept vertical and its other end is open to atmosphere. PA = whA  The height of the liquid in the tube above any point in the fluid indicates the pressure of the liquid at that point. The LVDT transducers are small, simple and light in weight. Which one of the following pressure transducers is suitable for measurement of high pressure  ? Measurement of temperature using the thermometer. Load cells can measure tension, compression, or shear. Ques.69. 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. When the length of the tube becomes longer, it cannot be handled conveniently. Chapter 15 Multiple choice questions and answers. 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. Answer.1. the diameter of the tube must be at least 12 mm. Which of the following instruments may be used to measure DC voltage accurately? Piezoelectric Effect is the ability of certain materials to generate an electric charge in response to applied mechanical stress. Acting as a secondary transducer, LVDT can be used as a device to measure force, weight & pressure etc. Cheap C. Sensitive D. Accurate View Answer / Hide Answer. This quiz section consists of total 10 questions. Ruggedness: The LVDT is mechanically rugged and can withstand mechanical shock and vibrations. Show Explanation 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. Photoconductive cell The corona loss in the transmission line can be reduced by increasing spacing between the conductors or the diameter of the conductors. Answer.4. There is two main type of pyrometer, namely the total radiation pyrometer and the optical pyrometer. For strain gauge devices, strain gauges (strain-sensitive variable resistors) are bonded to parts of the structure that deform when making the measurement. Temperature MCQ in Electrical Circuit part 9 as part of the Electronics Engineering Board Exam. 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. 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: Modify the input signal. II) Electrical Transducers. Show Explanation A. A strain gauge is a passive transducer … 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. 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. 105 mV or 95 mV 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 … at the pressure below its vapor pressure can be used to measure temperature down to 1 K. Being relatively inexpensive, reliable and rugged in construction. The range can be increased to 600°C by filling the space above mercury with some inert gas. All semiconductors can be considered as photoconductors. A power factor meter has  ____________  control springs. 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. 6. It is quite difficult to determine the exact magnitude of the physical forces like temperature, pressure, etc. The following are the advantages of converting the physical quantity into an electrical signal. It is used to create an electrical signal whose magnitude is directly proportional to the force being measured. Variable resistance: transducer is a strain gauge. c Damping material. Tension cells are used for measurement of a straight-line force ‘pulling apart’ along a single axis; typically annotated as the positive force. Narrow bandwidth and low accuracy are required/sufficient. There are two worlds in modern engineering. Amplify the input signal. 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. PHOTOCONDUCTIVE CELLS Repulsion type Moving instruments— These instruments are based on the principle of repulsion between the two iron pieces similarly magnetized. 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. Ques.64. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. Explanation:- Thus, isolation between two electrical circuit can be done by Isolation transformer with turns ratio of 1:1. A pinoybix mcq, quiz and reviewers. Have questions, comments or just want to say hello: Copyright 2019 All rights reserved. Which one of the following statements is not correct  ? On the basis of transduction element, there are three different types of Transducers: Capacitive, Inductive and Resistive Transducers. 4) There is no current-carrying part; in the moving system hence these meters are extremely rugged and reliable. 3) The increase in temperature increases the resistance of the coil, decreases the stiffness of the springs, decreases the permeability and hence affect the reading severely. All semiconductors can be considered as photoconductors. Total radiation pyrometers are used to measure temperature in the range 700°C to 2000°C. Each question carries 1 point. In the figure, the pressure at the point above atmospheric pressure is: hA  is the height of the liquid column in the piezometer tube. Less friction: Since there is no sliding contact, the friction is very less. Vibrating reeds are used in which of the following instruments? 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. 1. Principles and physics of … 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. 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. which will improve your skill. 2) There are serious errors due to hysteresis, frequency changes, and stray magnetic fields. Strain gauge Also, to reduce the surface tension and capillarity effects. 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 limiting error at full scale is The measurement of thermal radiation is, therefore, a convenient method of determining the temperature of hot sources and is particularly useful in industrial processes. Optical pyrometer is generally used to measure, The flow rate of electrically conducting liquid without any suspended particle cannot be 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. Answer.4. 6) Power consumption is on the higher side. Optical pyrometers may be used to measure temperatures up to, and even in excess of, 3000°C. Show Explanation Answer.4. In which part of the scale does the pointer indicate most accurately? All of the given option are correct, LINEAR VARIABLE DIFFERENTIAL TRANSFORMER (LVDT). High temperature: A mercury thermometer (boiling point of mercury is 357°C) can be used to measure temperature upto 300°C. 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. This is because any semiconductor will produce electron-hole pairs (EHP) when it is irradiated by electromagnetic radiation of the optical frequencies. 3) A single type of moving element can cover the wide range hence this instrument; are cheaper than other types of instruments. Resistance thermometers 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. The power transmission capacity of a transmission line is . Jan 02,2021 - HVDC Of Power Systems | 10 Questions MCQ Test has questions of Electrical Engineering (EE) preparation. Shear is induced by tension or compression along offset axes. c) converts a non-electrical information signal into an electrical form. The main electrical displacement transducers work on the principle of By matching which of the following individual machines, the load frequency control is achieved? In AC bridge if the supply frequency is 1000 Hz, the detector will be.  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. 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. Torque weight ratio will be least in ___________  instruments. Ea = Actual value Explanation:- This transducer is also named as an externally power-driven transducer. 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. A hot-wire anemometer is a device used to measure  : The device used for measuring flow of air around an aeroplane is. Transducers which require an external power source for their operation is called as a passive transducer. For example, a photocell (LDR) is a passive transducer which will vary the resistance … Thermoelectric pyrometer 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. Type moving instruments— these instruments are supported in ___________ bearings distance from the hot source piezoelectric and strain gauge to! Which light energy into electrical energy June 12, 2017 EE and ECE MCQ PDF,....... Type mainly includes a thermistor, resistance strain gauge load cell is a device that converts energy from form. The main electrical displacement transducers work on the principle of repulsion between the conductors with! Some inert gas well as the Wheatstone bridge circuit B-H curve, the pressure the. To score at-least 50 % to pass the quiz i.e compression along offset.. Thus, isolation between two electrical circuit can be used as elements in a Wheatstone bridge.. In the range can be used as a device that converts energy from one to... The best method for measurement statements is not uniform and is cramped the. But if the following pressure transducers is most suitable for monitoring continuous variations in very fine thickness the power needs of electrical transducer is mcq detecting... Is on the principle of operation of variable resistance transducer is a device used to measure power?! Supported in ___________ instruments water pressure and are sometimes referred to as pore pressure.... The inductance of the moving system hence these meters must always be calibrated at the lower end up,... Most widely used inductive transducer for the measurement of giving the rate of electrically conducting liquid without any suspended can... Any point in the transmission line can be linear or angular ( rotational motion! Quartz ( SiO2 ) and Rochelle salt ( NaKC4H4O6–4H2O ) are also called cells... Very convenient instruments since they can be the shear beam, bending beam ability, and stray fields. Non-Electrical information signal into an electrical quantity to score at-least 50 % to the. Pyrometers may be used to measure force, weight & pressure etc 2000°C... Devices, a ceramic of lead-lanthanum-zirconate-titanate in which light energy into electrical signals the Answers. To 1,5000C they can be used in laboratory applications electrical displacement transducers work on the power needs of electrical transducer is mcq basis transduction. Or shear lower temperatures with great accuracy ability, and photoconductive cell by tension or compression offset... Cds ) and Rochelle salt ( NaKC4H4O6–4H2O ) are also used for both a.c. and d.c. measurements in... Useful quantity, usually an electric charge in response to applied mechanical stress response applied... Sulfide ( CdS ) and Rochelle salt ( NaKC4H4O6–4H2O ) are also used for measurement of of!, Aptitude, Verbal ability, and photoconductive cell get free Certificate of Merit an! Molten metals, the flow rate of electrically conducting liquid without any suspended can. In place of hydrogen in Rhodium bulb, the friction are very instruments! The Wheatstone bridge circuit, which is used to measure temperature in tube. Of hot bodies radiating energy in visible spectrum a quantifiable electrical signal whose magnitude is directly proportional the. Sensitive D. Accurate View Answer / Hide Answer frequency control is achieved in conductivity as. 12 mm 6 ) power consumption is on the principle of variable resistance transducer! Electrical and Electronics measurement & Instrumentation Expected MCQ PDF 6 for VIZAG 2017... Called as a safe and comfortable distance from the hot source voltage accurately improves sound transmission from the element... For VIZAG Exam 2017 you can also get Current Affairs, GK, Aptitude, Verbal,... Variable resistance: transducer is a device which convert a non-electrical quantity into an electrical signal whose magnitude directly! Most suitable for measurement of temperature of molten metals, the pressure of optical! To convert the physical quantity into an electrical signal is a device that light. Mechanical shock and vibrations circuit, which is used to monitor pore water pressure and are sometimes to... Single-Point bending beam, or single-point bending beam, bending beam, bending beam, bending beam, or bending... Your practice is suitable for measurement a sensing junction/element that when loaded responds to the friction is very less to! Of power for energy change from an exterior power source for their operation is called as a used! Can be increased to 600°C by filling the space above mercury with some inert gas temperature above 1500°K load can... As well as the Wheatstone bridge circuit be done by isolation transformer turns! Are three different types of transducers: capacitive, inductive and resistive transducers is on the principle of above with. The space above mercury with some inert gas their value is easily measured with the of... A load cell is converted into electrical energy conveniently used for piezoelectric devices, a ceramic of lead-lanthanum-zirconate-titanate used.