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. Top Bio Instrumentation Objective Questions, Important Objective Questions On Productivity, Instrumentation and Control Engineering Objective Test 2, Instrumentation and Control Engineering Objective Test 1. This is especially undesirable if the number of readings to be taken is quite large. Now a day computer is one of the most important field for every examinations. One B. The secondary instruments may be classified as. 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. And it has very low resistance to ensure the correct measurement of current in the circuit. Drop across the crystal is due to the current passed through it B. 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. Recording Instrument: The recording instruments are those instruments which give a continuous record of the variations of the electrical quantity to be measured. Signal processing 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. Controlling torque is also known as restoring torque i.e., it brings back the pointer to its zero position when deflecting torque is withdrawn. 2-Which of the following form the basis of Electrical domain? The ear itself can be structured into three sections with the purpose to ... sensors causes frequency dispersion. In a broad sense, analog instruments may be classified into two ways: Absolute instruments:- Absolute instruments give the value of the electrical quantity to be measured in terms of the constants of the instruments and to its deflection, no comparison with another instrument being required. Note that a transducer and a sensor are not the same. 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 Rome (Headquarter) Via delle Quattro Fontane, 33 00184 Rome (RM) â Italy P.IVA - VAT: 05312981003 +39.06.4824033 info@mcqinst.com Mon â Fri: 9:00 â 18:00 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. Shunts are small resistances connected in parallel to increase the range of an ammeter. The deflecting torque works on the moving system which the pointer is attached. What should be the size of the slide wire of the potentiometer to make it to achieve high accuracy? Integrating instruments record totalized events over a specified period of time. Rs- Resistance Should be Connected in Series with your existing Ammeter=? Passive: Does sensor draw energy from the signal ? In hot wire instrument, the sensing wire is made of. 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. 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). Multiple Choice Questions have been coming in Class 10 Physics exams, thus do MCQs to test understanding of important topics in the chapters. Other types of signal processing element are those that filter out induced noise and remove mean levels, etc. Download MCQs for Class 10 Physics with answers in PDF download format for important topics in Grade/ Class 10 Physics based on 2021 CBSE| NCERT | KVS syllabus and pattern. Im = full-scale deflection current of ammeter = ? Spring control and gravity control are used for, Is inserted in series in a circuit and current to be measured flows through it, Is inserted in series in a circuit and part of the current to be measured flows through it, Is connected in parallel in a circuit and current to be measured flows through it. For instance, the displacement-measuring strain gauge has an output in the form of a varying resistance. This is especially undesirable if the number of readings to be taken is quite large. Explanation:- 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. For instance, the displacement-measuring strain gauge has an output in the form of a varying resistance. 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. The wire from which the coil is made is nearly always copper; unfortunately, the resistance of a copper coil varies appreciably with temperature. Controlling torque is also known as restoring torque i.e., it brings back the pointer to its zero position when deflecting torque is withdrawn. 181 . Multiple Choice Questions and Answers on Semiconductor Theory. This known voltage is supplied by a standard cell or through a reference source. Ampere-hour and watt-hour (energy) meters are examples of this category. There is also a negligible thermoelectric effect when manganin is used with copper. Ques.6. Indicating instruments are instruments which indicate the magnitude of a quantity being measured. Physics MCQ Mock Test Chapter-6 - JOBS AND EXAMS. 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. In the above given example of thermocouple. Variable conversion elements In some devices, signal processing is incorporated into a transducer, which is then known as a transmitter. Answer.1. 5-The following main dynamic characteristic(s) is usually considered in Mechatronics application of sensors. Try the following multiple choice questions to test your knowledge of this chapter. A measuring system exists to provide information about the physical value of some variable being measured. Given below are top 10 MCQ Questions on Sensors and their working. Controlling Torque 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. MCQ in Fiber Optics Communications Part 1 as part of the Communications Engineering (EST) Board Exam. The period of oscillation of a simple pendulum is given by where l is about 100 cm and is known to 1mm accuracy. Household energy meter is an integrating instrument. Important characteristics of sensors and transducers are listed below: Input characteristics Transfer characteristics Output characteristics Input Characteristics of Sensors Range: It is the minimum and maximum value of physical variable that the sensor can sense or measure. So In the case of longer wire, the fall of potential per unit length is small. A. Difference between successive tests under identical conditions. 1. 17-Following type of sensors are used to generate information in object grasping and obstacle avoidance. 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. Lesser the potential gradient, more accurate is the potentiometer. Your email address will not be published. Deflecting Torque: In order to move the pointer from its zero position on the scale deflecting torque is required. In other words, the potential gradient is small. Multiple Choice Questions with Answers on Refrigeration and Air-Conditioning - Set 07. Medical Physics in questions and answers ~ 6 ~ Angle acceleration α of a rotating body equals to ratio of angle velocity Ï and time t α = Ï / t vector quantity; [α] = 1 rad.s-2 Centripetal force Fd force causing centripetal acceleration during motion on circle trajectory. Explanation:- Sensors are characterized depending on the value of some of the parameters. b) Digital vs. Analog: Is the signal discrete or continuous? Electrical signal into non electrical quantity B. Multiple Choice Questions on RLC Circuits and Resonance - Set 01 MCQ RLC Circuits Edit Practice Test: Question Set - 01 . Rsh = shunt resistance = 75Ω, The full-scale deflection current Im is given as. Practice Test: Question Set - 07 1. It is a moving coil galvanometer in which a low resistance wire is connected in parallel. A deflecting torque is required to overcome the inertia, damping effect and controlling effect of the moving system. measure current in amperes. Chemical Effect A potentiometer is an instrument designed to measure an unknown voltage by comparing it with a known voltage. The deflecting torque works on the moving system which the pointer is attached. The Following Section consists Multiple Choice Questions on Logic Gates. Voltmeter Answer.4. Save my name, email, and website in this browser for the next time I comment. Magnetic effect Thermal effect Some examples of primary sensors are a liquid-in-glass thermometer, a thermocouple, and a strain gauge. A measuring system exists to provide information about the physical value of some variable being measured. Answer.1. 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. The potentiometer makes use of null or balanced condition for the purpose of measurement. The thermocouple acts as a transducer but the additional circuits or components needed like the voltmeter, a display etc together from a temperature sensor.. 1. 1-Which of the following is not covered under Mechanical energy domain? Hence it is used in series. However, in general, the primary sensor is only part of a measurement system. 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. it acts like a closed switch so it indicates the current. 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. Multiple Choice Questions and Answers By Sasmita January 9, 2020. Which of the following is its kinetic energy in the first excited state? We will add more questions soon. : The McQ RANGER ® is a low cost sensor system using seismic, acoustic and magnetic to detect people, vehicles and aircraft. Some examples of primary sensors are a liquid-in-glass thermometer, a thermocouple, and a strain gauge. Title: Slide 1 Multiple Choice Questions and Answers on Semiconductor Theory. 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. For multi-range ammeters, the moving coil remaining same; separate shunts are used to increase the range of measurement of a single 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. These instruments utilize the principle of expansion of wire, heat due to the current being measured, passing through the wire. The electronic amplifier is a very common type of signal processing element. Signal recording 171 . An ammeter measures the value of current flowing in the circuit, so current should flow inside ammeter to give proper result. Download the largest collection of free MCQs on Physics for Competitive Exams. This known voltage is supplied by a standard cell or through a reference source. However, in more complex measurement situations, a measuring system consists of several separate elements as shown in Figure. 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. An ammeter measures the value of current flowing in the circuit, so current should flow inside ammeter to give proper result. 17-Following type of sensors are used to generate information in object grasping and obstacle avoidance. 3-The sensors are classified on the basis of. Damping Torque: At the final deflected position, when the deflecting and controlling torques are equal, the pointer starts oscillating owing to its inertia and therefore, cannot immediately settle at its final deflected position. The range is the maximum value of the measured that can be measured by a given meter. For example, amplification is needed for thermocouples, which have a typical output of only a few millivolts. 39. Damping Torque: At the final deflected position, when the deflecting and controlling torques are equal, the pointer starts oscillating owing to its inertia and therefore, cannot immediately settle at its final deflected position. v Putting a large resistance in series with the actual measuring part of the instrument. Take the Quiz and improve your overall Engineering. Two soap bubbles have radii in the ratio of 4:3. (A) Hall Effect sensor Show Explanation In some devices, signal processing is incorporated into a transducer, which is then known as a transmitter. In addition to reading the questions and answers on my site, I would suggest you to check the following, on amazon, as well: Spring control and gravity control are used for controlling torque. Ampere-hour meter another example of integrating instruments. 12-Following is (are) true for Hall Effect sensors. 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. aspects of the hearing process, the physics of the ear. Dec 19,2020 - Modern Physics Practice Level - 1 | 45 Questions MCQ Test has questions of Class 12 preparation. Physics MCQ Mock Test Chapter-6 1. 18-Inductive proximity sensors can be effective only when the objects are of _____ materials. Which of the following is not an integrating instrument? Show Explanation Transducer - MCQs with answers Q1. 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. 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