physics of sensors mcq

Show Explanation Note that a transducer and a sensor are not the same. And it has very low resistance to ensure the correct measurement of current in the circuit. 5-The following main dynamic characteristic(s) is usually considered in Mechatronics application of sensors. 1-Which of the following is not covered under Mechanical energy domain? This causes the current that is to be measured to divide, a small part flowing through the coil and the remainder passing through the shunt resistor. Induced voltage by the applied magnetic field C. Movement of charge carriers towards one end D. All of the above The summation, which they give, is the product of time and an electrical quantity. Explain the repeatability of a transducer. Controlling Torque: With the help of the deflecting torque, the pointer deflection will take place on the calibrated scale but to stop the pointer at the definite position, controlling torque (Tc.) Learn About Sensors & Transducers Objective Question. However, in more complex measurement situations, a measuring system consists of several separate elements as shown in Figure. Physics MCQ Mock Test Chapter-6 - JOBS AND EXAMS. Practice Test: Question Set - 07 1. Explanation:- Obviously, the magnitude of deflecting torque produced is proportional to the magnitude of the quantity being measured, say, the current I flowing through the instrument. Explain the linearity of a transducer. Take the Quiz and improve your overall Engineering. (A) Hall Effect sensor Comprehensive and up-to-date question bank of mutiple choice objective practice questions and answers on Physics for Competitive Exams. In addition to reading the questions and answers on my site, I would suggest you to check the following, on amazon, as well: Show Explanation It consists of a hot wire of platinum-iridium (because it can withstand high temperatures of about 300°C without being oxidized), and about 0.2 mm in diameter. 8-It is the time required to come to an output value within the specified error level. Non electrical quantity into electrical signal C. Electrical signal into mechanical quantity D. All of these View Answer / Hide Answer. A potentiometer is an instrument designed to measure an unknown voltage by comparing it with a known voltage. 13-A piezo-electrical crystal generates voltage when subjected to ____ force. Which of the following is its kinetic energy in the first excited state? Controlling torque is also known as restoring torque i.e., it brings back the pointer to its zero position when deflecting torque is withdrawn. 12-Following is (are) true for Hall Effect sensors. ANSWER: A. Monometers . As the deflection of the pointer increases, the controlling torque also increases and stops the pointer at the measured value. Vr=(Rs×If)Vr=(Rs×If) (We know that Ra=0 ), Ques.7. Ques.6. However, in general, the primary sensor is only part of a measurement system. 17-Following type of sensors are used to generate information in object grasping and obstacle avoidance. It is important that the measurement system is designed properly such that the output from measurement sensors is of an appropriate amplitude and is as free from noise contamination as possible. Primary Sensors:- The first element in any measuring system is the primary sensor: this gives an output that is a function of the measurand (the input applied to it). In some devices, signal processing is incorporated into a transducer, which is then known as a transmitter. Rs- Resistance Should be Connected in Series with your existing Ammeter=? Is connected in parallel in a circuit and current to be measured flows through it, An ammeter is connected in series with the load, To measure current, you want most of the current to pass through it. Sensor is assumed to have a constant gain (linear approximation). 11-The following is (are) type(s) of Hall Effect sensors. A sensor is a device that takes input from the physical environment. Solid State Detectors and Electronics – Sensor Physics I Helmuth Spieler TRIUMF Summer Institute 2007 LBNL Intrinsic Resolution of Semiconductor Detectors FWHM 2.35 i Q 2.35 i 2.35 i i E E FN F FEE E = ˝ = ˝ = Si: Ei = 3.6 eV F = 0.1 Ge: Ei = 2.9 eV F = 0.1 Detectors with good efficiency for this The electronic amplifier is a very common type of signal processing element. Hence ammeter is connected in series with the low resistance. : The McQ RANGER ® is a low cost sensor system using seismic, acoustic and magnetic to detect people, vehicles and aircraft. Small Size: 2 3/4 x 2 x 1 1/4 inches, easy to use … Primary Sensors:- The first element in any measuring system is the primary sensor: this gives an output that is a function of the measurand (the input applied to it). Two soap bubbles have radii in the ratio of 4:3. Damping Torque This class of instruments is in most general use, the absolute instrument being seldom used except in standard laboratories and similar institutions. Recording Instrument: The recording instruments are those instruments which give a continuous record of the variations of the electrical quantity to be measured. comes into action. Transducer - MCQs with answers Q1. The instruments which add up the electrical quantity, i.e electrical energy and measure the total energy (in kilowatt hours) or the total Amper hours (in ampere-hours) supplied to a circuit in a given period are called integrating instruments. Recording instruments give a continuous record of the quantity being measured over a specified period. A deflecting torque is required to overcome the inertia, damping effect and controlling effect of the moving system. utting a large resistance in series with the actual measuring part of the instrument. The Following Section consists Multiple Choice Questions on Logic Gates. Some examples of primary sensors are a liquid-in-glass thermometer, a thermocouple, and a strain gauge. The current range of a DC moving coil ammeter is extended by connecting a shunt resistance Rs (low resistance) across the coil, the circuit as shown in Figure, I = Total current = 5A Input Output Device Based MCQ. measure current in amperes. In the case of the mercury-in-glass thermometer, the output reading is given in terms of the level of the mercury, and so this particular primary sensor is also a complete measurement system in itself. Thus, for the measurement of large current and voltage values, it is necessary to employ a device which reduces the current and voltage of the instrument by a known proportion. 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. What is the value of current (in A) flowing through the galvanometer, if the total current in the circuit is 5 A? A deflecting torque is required to overcome the inertia, damping effect and controlling effect of the moving system. In simple cases, the system can consist of only a single unit that gives an output reading or signal according to the magnitude of the unknown variable applied to it. Lesser the potential gradient, more accurate is the potentiometer. Ques.10. The range is the maximum value of the measured that can be measured by a given meter. b) Digital vs. Analog: Is the signal discrete or continuous? In hot wire instrument, the sensing wire is made of. It is equal to the – product of mass m and centripetal acceleration ad, i.e. Variable conversion elements The instruments which add up the electrical quantity, i.e electrical energy and measure the total energy (in kilowatt hours) or the total Amper hours (in ampere-hours) supplied to a circuit in a given period are called integrating instruments. Answer.1. Rome (Headquarter) Via delle Quattro Fontane, 33 00184 Rome (RM) – Italy P.IVA - VAT: 05312981003 +39.06.4824033 info@mcqinst.com Mon – Fri: 9:00 – 18:00 As the deflection of the pointer increases, the controlling torque also increases and stops the pointer at the measured value. Explanation:- The potential difference across a length of the potentiometer wire is directly proportional to its Length (or) when a steady current is passed through a uniform wire, potential drop per unit length or potential gradient is constant. Spring control and gravity control are used for controlling torque. Function of transducer is to convert A. Practicing these multiple choice questions on Physics questions in online mcq quiz mode will be helpful to increase your general knowledge on physics and will definitly be helpful to take your score high in actual Tests in any competitive exams like - rail, bank, ssc, psc, upsc, tet, etc. Rome (Headquarter) Via delle Quattro Fontane, 33 00184 Rome (RM) – Italy P.IVA - VAT: 05312981003 +39.06.4824033 info@mcqinst.com Mon – Fri: 9:00 – 18:00 This known voltage is supplied by a standard cell or through a reference source. Integrating instruments record totalized events over a specified period of time. These instruments utilize the principle of expansion of wire, heat due to the current being measured, passing through the wire. Integrating Instruments: All of these Magnetic effect In such instruments, there are sets of dials or gears which register the total quantity of electricity or the total amount of electrical energy supplied to a circuit in a given period. The range of voltmeters, ammeters, etc., is limited by the current carrying capacity of the control springs, high measuring parameters, etc. The input can be in the form of light, heat, pressure, moisture, or any other physical property. The pointer attains a steady position when controlling torque becomes numerically equal to deflecting torque i.e., Tc = Td. Show Explanation Multiple Choice Questions and Answers on Semiconductor Theory. In some cases, the primary sensor and variable conversion element are combined, and the combination is known as a transducer. No calibration of the instrument is thus necessary. A. The resistance change cannot be easily measured and so it is converted to a change in voltage by a bridge circuit, which is a typical example of a variable conversion element. A measuring system exists to provide information about the physical value of some variable being measured. 19-Following acts as detector in Optical sensor, 1-(B), 2-(D), 3-(D), 4-(B), 5-(D), 6-(B), 7-(A), 8-(C), 9-(D), 10-(A), 11-(C), 12-(D), 13-(B), 14-(C), 15-(C), 16-(D), 17-(B), 18-(A), 19-(B), Your email address will not be published. A pinoybix mcq, quiz and reviewers. Example: The example of such an instrument is Recording voltmeters which are used in power stations to record the generated voltage. Drop across the crystal is due to the current passed through it B. In such instruments, there are sets of dials or gears which register the total quantity of electricity or the total amount of electrical energy supplied to a circuit in a given period. 1. Obviously, the magnitude of deflecting torque produced is proportional to the magnitude of the quantity being measured, say, the current I flowing through the instrument. The thermocouple acts as a transducer but the additional circuits or components needed like the voltmeter, a display etc together from a temperature sensor.. Platinium-iridium Chemical Effect Try this amazing Wireless Network MCQ's quiz which has been attempted 15046 times by avid quiz takers. Multiple choice questions. It is a moving coil galvanometer in which a low resistance wire is connected in parallel. In other words, the potential gradient is small. A pointer of an instrument once deflected returns to zero position, when the current is removed due to. 6-The ability to give same output reading when same input value is applied repeatedly is known as. However, in more complex measurement situations, a measuring system consists of several separate elements as shown in Figure. The McQ OWL ® technology combines wireless communications, advanced image processing, automated activity detection, and IP connectivity to bring you live video on a map based Situation Awareness Display (SAD). Try the following multiple choice questions to test your knowledge of this chapter. Errors in Measurement MCQs with Answers. MCQs on input and output devices (GK Objective Question Answer) exam question answer for competitive exam of govt jobs. Which of the following material will be preferred as a shunt for extending the range of measurement of a voltmeter. The period is about 2s. To see this page as it is meant to appear, please enable your Javascript! Where φ is the potential gradient 7-It is the ability of the sensor to indicate the same output over a period of time for a constant input. For instance, the displacement-measuring strain gauge has an output in the form of a varying resistance. In simple cases, the system can consist of only a single unit that gives an output reading or signal according to the magnitude of the unknown variable applied to it. Is connected in parallel in a circuit and only part of the current to the measured flows through it. Instrumentation Interview Questions Instrumentation MCQ Multiple Choice Questions. Recording Instrument: The recording instruments are those instruments which give a continuous record of the variations of the electrical quantity to be measured. Controlling torque An ammeter is convertible to a voltmeter by, Answer.3. Ques.9. So dear reader I have provided top expected gk questions from input and output device of computer. II-Characteristics of different types of sensors a) Active vs. v 4-The following is not a static performance parameter to be looked into before selecting a parameter. We will add more questions soon. For instance, the displacement-measuring strain gauge has an output in the form of a varying resistance. Multiple Choice Questions and Answers By Sasmita January 9, 2020. 15-‘Any radiation of appropriate wavelength fall on the depletion layer of p-n junction develops a potential difference between the junction’ is working principle of, 16-Following is (are) the type(s) of Light sensor(s). It is important that the measurement system is designed properly such that the output from measurement sensors is of an appropriate amplitude and is as free from noise contamination as possible. Multiple Choice Questions have been coming in Class 10 Physics exams, thus do MCQs to test understanding of important topics in the chapters. Your email address will not be published. a = m . Basically, there are three types of Force or torque act upon the Measuring Instrument. Signal recording Hence the transducer will just convert the energy from one form to another and all the remaining work is done by the additional … So In the case of longer wire, the fall of potential per unit length is small. 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Crystal is due to the – product of mass m and centripetal physics of sensors mcq,! Give, is the usual alloy used for controlling torque is required vr= ( Rs×If ) ( We that... Choice Objective Practice Questions and Answers for Freshers: interview Questions and Answers on WIRELESS NETWORKS. Several separate elements as shown in Figure an integrating instrument following form the basis electrical... Wire, the potential gradient is small govt jobs the potential gradient, more accurate is the product of.! A static performance parameter to be taken is quite large required to come to an in! Sensor system using seismic, acoustic and magnetic to detect people, vehicles and aircraft normally required a.

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