This deflecting torque can be produced by any of this effects of current (or of voltage) such as. 3-The sensors are classified on the basis of. The input can be in the form of light, heat, pressure, moisture, or any other physical property. There is also a negligible thermoelectric effect when manganin is used with copper. Damping Torque Q8. Posted on April 6, 2018 by makoxmcqs. 13-A piezo-electrical crystal generates voltage when subjected to ____ force. 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. Basically, there are three types of Force or torque act upon the Measuring Instrument. Answer.3. 5-The following main dynamic characteristic(s) is usually considered in Mechatronics application of sensors. 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. Example: The example of such an instrument is Recording voltmeters which are used in power stations to record the generated voltage. For example, amplification is needed for thermocouples, which have a typical output of only a few millivolts. For instance, the displacement-measuring strain gauge has an output in the form of a varying resistance. If no extra force is provided to damp these oscillations, the moving system will take considerable time before coming to settle to the final deflected position. Explain the repeatability of a transducer. 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. This known voltage is supplied by a standard cell or through a reference source. The pointer attains a steady position when controlling torque becomes numerically equal to deflecting torque i.e., Tc = Td. 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. Sorry, you have Javascript Disabled! For multi-range ammeters, the moving coil remaining same; separate shunts are used to increase the range of measurement of a single instrument. Variable conversion elements:- They are needed where the output variable of a primary transducer is in an inconvenient form and has to be converted to a more convenient form. 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. 17-Following type of sensors are used to generate information in object grasping and obstacle avoidance. Answer.3. Download the largest collection of free MCQs on Physics for Competitive Exams. A push or pull on an object is called _____ (a) Force (b) Pressure (c) Density (d) None of these 2. : The McQ RANGER ® is a low cost sensor system using seismic, acoustic and magnetic to detect people, vehicles and aircraft. (A) 13.6 eV (B) 6.8 eV (C) 3.4 eV (D) 1.825eV 2.A freshly prepared radioactive source of half life 2 hrs emits radiation of … Continue reading "MCQ : Modern Physics" 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. Sensors are characterized depending on the value of some of the parameters. The electrical aspects of information transfer will be discussed in section 6. Ish = shunt current Function of transducer is to convert A. Multiple Choice Questions and Answers on Semiconductor Theory. Also explore over 27 similar quizzes in this category. 12-Following is (are) true for Hall Effect sensors. A. Rs- Resistance Should be Connected in Series with your existing Ammeter=? Signal processing So In the case of longer wire, the fall of potential per unit length is small. Shunts are small resistances connected in parallel to increase the range of an ammeter. Ques.6. And it has very low resistance to ensure the correct measurement of current in the circuit. If the displacement is measured with strain gauge then the number of strain gauge normally required are A. Multiple choice questions. Try the following multiple choice questions to test your knowledge of this chapter. Show Explanation Explanation:- Analog sensors theoretically have infinite resolution but is limited by noise. Which of the following is its kinetic energy in the first excited state? Hence the transducer will just convert the energy from one form to another and all the remaining work is done by the additional … 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 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. b) Digital vs. Analog: Is the signal discrete or continuous? The variation of the quantity being measured is recorded by a pen Attache to the moving system of the instrument; the moving system is operated by the quantity being measured on a sheet of paper that moves perpendicular to the movement of the pen. To see this page as it is meant to appear, please enable your Javascript! A measuring system exists to provide information about the physical value of some variable being measured. Ques.10. 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 Spring control and gravity control are used for controlling torque. In the above given example of thermocouple. Multiple Choice Questions and Answers By Sasmita January 9, 2020. In some cases, the primary sensor and variable conversion element are combined, and the combination is known as a transducer. Note that a transducer and a sensor are not the same. Transducer - MCQs with answers Q1. a = m . The thermocouple acts as a transducer but the additional circuits or components needed like the voltmeter, a display etc together from a temperature sensor.. A pinoybix mcq, quiz and reviewers. Recording Instrument: The recording instruments are those instruments which give a continuous record of the variations of the electrical quantity to be measured. 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. This quiz contains practice questions for Measurement Of Physical Quantities (O Level).There are explanations for some of the questions after you submit the quiz. The deflecting torque works on the moving system which the pointer is attached. These instruments utilize the principle of expansion of wire, heat due to the current being measured, passing through the wire. Controlling torque Variable conversion elements:- They are needed where the output variable of a primary transducer is in an inconvenient form and has to be converted to a more convenient form. Lesser the potential gradient, more accurate is the potentiometer. Some examples of primary sensors are a liquid-in-glass thermometer, a thermocouple, and a strain gauge. 1. The electronic amplifier is a very common type of signal processing element. Electrical signal into non electrical quantity B. Show Explanation This test is Rated positive by 86% students preparing for Class 12.This MCQ test is related to Class 12 syllabus, prepared by Class 12 teachers. Sensors are usually combined with some electronic components so as to obtain some useful data. aspects of the hearing process, the physics of the ear. Errors in Measurement MCQs with Answers. Signal recording Given below are top 10 MCQ Questions on Sensors and their working. Non electrical quantity into electrical signal C. Electrical signal into mechanical quantity D. All of these View Answer / Hide Answer. Robotics multiple choice questions and answers on Robotics MCQ questions quiz on Robotics objective questions with answer Page 2 info[at]objectivequiz[dot]com Login Other types of signal processing element are those that filter out induced noise and remove mean levels, etc. A sensor is a device that takes input from the physical environment. Manganin is the usual alloy used for shunts because this material has a negligible temperature coefficient at the temperatures involved. c) Null and deflection methods d) Input – Output configuration Two C. Three D. Four ... B. Diaphragm sensors C. Bourdon tube D. Resonant wire device View Answer / Hide Answer. Ampere-hour meter another example of integrating instruments. Secondary instruments:- Secondary instruments are so constructed that the value of current, voltage or other quantity to be measured can be determined from the malefaction of the instruments, only if the latter has been calibrated by comparison with either an absolute instrument or one which has already been calibrated. 39. Answer.3. Class 11th Physics | MCQs based on Errors in Measurement. It is a moving coil galvanometer in which a low resistance wire is connected in parallel. it acts like a closed switch so it indicates the current. Induced voltage by the applied magnetic field C. Movement of charge carriers towards one end D. All of the above Indicating instruments are instruments which indicate the magnitude of a quantity being measured. A resistance of 75 Ohms is connected in shunt of a galvanometer, having an internal resistance of 25 Ohms, to convert it into an ammeter. Spring control and gravity control are used for controlling torque. The measurement sensor includes Other types of signal processing element are those that filter out induced noise and remove mean levels, etc. Instrumentation Interview Questions Instrumentation MCQ Multiple Choice Questions. The total energy of the electron in the hydrogen atom in the ground state is -13.6 eV. Magnetic effect The period of oscillation of a simple pendulum is given by where l is about 100 cm and is known to 1mm accuracy. 1. For example, the tangent galvanometer gives the value of the current to be measured in terms of the tangent of the angle of deflection produced by the current, the radius and the number of turns of galvanometer coil, and the horizontal component of the earth’s magnetic fierce. Household energy meter is an integrating instrument. 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. 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