The damping ratio and peak overshoot are measures of: 1) Relative stability 2) Speed of r... Electronics Instrumentation objective questions: Q1. Optical heterodyne detection is a method of extracting information encoded as modulation of the phase, frequency or both of electromagnetic radiation in the wavelength band of visible or infrared light. Photo resistors change their electrical properties when illuminated. To see this page as it is meant to appear, please enable your Javascript! a. the time required for the signal to go from 10 to 90 percent of maximum amplitude. Current 2. Which of the following is not a characteristic of the immobilized enzymes? PIN Diode PIN photodiode is a kind of photo detector, it can convert optical signals into electrical signals. Prepare Now for free! Photo diode. a) Ferro magnetic b) Diamagnetic c) Paramagnetic d) All of the above Answer: b Ques 7. x Advanced multi-criteria fire detector that has optical, ... each Model OOH C941 houses the following components: 9Two (2) optical transmitters 9One (1) optical receiver 9Two (2) thermal sensors 9One (1) CO sensor The transmitters illuminate the smoke particles from different angles: one sensor acts as forward scatterer, the other sensor as a backward scatterer. 12, Villach, Austria - (Marcus.Baumgart, Cristina.Consani)@ctr.at 2 Infineon Technologies Austria AG, Development Center Graz, Babenberger Str. 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8-(C), 9-(D), 10-(A), 11-(C), 12-(D), 13-(B), 14-(C), 15-(C), 16-(D), 17-(B), 18-(A), 19-(B), Your email address will not be published. :: What Is an Photodetector? The sensor used in this project is MQ-2 Gas/Smoke sensor. Light sensors or Photo Sensors can be classed into three types based on the physical quantity that is affected. It consists of special optical and electronic devices, which integrates adaptive algorithm for indoor and outdoor application environment. The excitation takes place by applying an external voltage and the recombination may be taking place, or it may be stimulated as another photon. Optical sensors use visible or ultraviolet light to interrogate sensors for analysis. The Boolean experssion Y=AB + CD represents 1) Two ORs ANDed together 2) A 4 input ... Home | Raindrop Sensor is a tool used for sensing rain. Following acts as detector in Optical sensor . Sensors are low, and go high when they see a white surface. Photodiodes and photo transistors are a few examples of photo detectors. Multiple choice questions. Optical Detectors Wei-ChihWang Department of Power Mechanical Engineering ... current/voltage characteristics is shown in the following figure: (a) Photovoltaic Operation -Rl>>Rd, load line ... w.wang Types of Optical Detectors Photon detectors may be further subdivided according to the physical effect that produces the detector response. Light-to-Frequency. A. Transducer B. Tachometer C. Multimeter D. Phase-meter. To practice all areas of Analytical Instrumentation, here is complete set of 1000+ Multiple Choice Questions and Answers . Application of Optical Sensors Document Number: 81449 Rev. The sensor acts as a variable resistance that will change status : the resistance increases when the sensor is wet and the resistance is lower when the sensor is dry. Nest Yale Lock into a signal which can be measured electrically. The optical encoder is a transducer commonly used for measuring rotational motion. For optical sensors to work effectively, they must be the correct type for the application, so that they maintain their sensitivity to the property they measure. A Sensor converts the physical parameter (for example: temperature, blood pressure, humidity, speed, etc.) Explanation: No explanation is available for this question! (2019, July 25). The laser sensor can be used as a distance-measuring tool to detect the distance from it to obstacles. IR gas sensing technology provides for fail-to-safe operation in contrast to electrocatalytic sensors since optical sensing is an active technology, which continuously monitors for sensor faults and communicates them to the user. I have a machine failing optical detector constantly and intermittently failing TMP low soft. Optical Combiner b. Optical Splitter c. Optical Coupler d. None of the above. Optical sensors can be represented in general terms as a wavelength-selectable light source, the sensor material itself interacting with analytes, and a light detector (Fig. Read more » Coming exhibitions See our products at following exhibitions. 10-Following is not an example of transducer. A pinoybix mcq, quiz and reviewers. It is the ability of the sensor to indicate the same output over a period of time for a constant input. Following type of sensors are used to generate information in object grasping and obstacle avoidance. Proximity sensor simply means; A sensor that detects, captures, and relays information without any physical contact! A second light detector is added 90° out of phase. TMD4903 : Color, ALS, and proximity sensor module with mobeam™ and universal remote control. A.C. power into D.C. power     2. A. See all products . The p-region and n-region… C.Has a constant voltage across it Your Comments. B. An optical detector is a device that converts light signals into electrical signals, which can then be amplified and processed. Optical sensors measure changes to the amount of light shining on the sensor. Dubai Sensors is an e-commerce platform, where we host an array of industrial products, ranging from sensors to controllers, measuring equipment to accessories, Dubai Sensor is the place where we provide to our kind customers with all the industrial and automation solutions they desire. Definitions: Transducer and sensors • Transducer – a device that converts a primary form of energy in to a corresponding signal with a different energy form Primary Energy Forms: mechanical, thermal, electromagnetic, optical, chemical, etc. 21) What is secondary transducer? Biosensors Questions & Answers 1. D.C. power into A.C.... Control System_1 Objective Questions: Que 1. The detectors used in optical sensors is - Published on 16 Sep 15. a. A. The main classes are Photo resistors, photo voltaic and photo emitters. 15. These sensors are used in automotive, aerospace, medical, defence and industrial applications. SiTek - the company SiTek Electro Optics designs, manufactures and sells state-of-the-art position sensing detectors (PSDs) of the highest value and quality, with the focus on the customer. Sorry, you have Javascript Disabled! Shift Registers b. MCQ in Fiber Optics Communications Part 1 as part of the Communications Engineering (EST) Board Exam. The absorbed photons make electron–hole pairs in the depletion region. 16. a. the time required for the signal to go from 10 to 90 percent of maximum amplitude. a) Light emitting diode b) Photo diode c) Transistor 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). At the base-emitter junctions of a transistor, one finds …………… 1. a reverse bias 2. a wide dep... Microwave Frequency Bands The microwave spectrum is usually defined as a range of frequencies ranging from 1 GH... Oscillators Objective Questions: Q 1. Which among the following controls the length of Fabry-Perot interferometer so that it can act as a tunable optical filter? Let’s explain the example of temperature. Optical Detector Definitions of Characteristics 3-dB Bandwidth The frequency where the photodetector ’s output electrical power has dropped 3 dB from a low-frequency reference. a) They cannot be re-used b) It produces reproducible results c) Stability exists d) Same catalytic activity is present for number of analysis Answer: a Explanation: Immobilized enzymes can be reused. b. the ratio of the diode output current to optical input power. An open loop B. Optical flow or optic flow is the pattern of apparent motion of objects, surfaces, and edges in a visual scene caused by the relative motion between an observer and a scene. (A) They can operate as switches of high frequency, (B) They cost less than electromechanical switches, (C) They are free from contact bounce problem. Power 4. Optical: Wave, wave velocity, refractive index, reflectivity, ... X. UV Sensors. As mentioned every objest acts as transmitter as they emit infrared light. Photodetectors, also called photosensors, are sensors of light or other electromagnetic radiation. 20060219961: Security markers for controlling access to a secure area: October, 2006: Ross et al. A. Microphones that record audio and can detect specific sounds or motion nearby. A semiconductor can act as both conductor, semiconductor and insulators on different temperatures. : The McQ RANGER ® is a low cost sensor system using seismic, acoustic and magnetic to detect people, vehicles and aircraft. 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). Home >> Category >> Electrical Engineering (MCQ) questions and answers >> Electrical and Electronic Measurements & Instrumentation; Q. A light source and an optical sensor are mounted on opposite sides of each track. Q8. A Sensor converts the physical parameter (for example: temperature, blood pressure, humidity, speed, etc.) When a PN Junction is formed, diffusion current causes 1) mixing of current carriers 2) ... Control System_2 Objective Questions: Que 1. In circulator, an optical path of signal follows _____ A. PROCEDURE ENABLING SIMULATION AND IN-DEPTH ANALYSIS OF OPTICAL EFFECTS IN CAMERA-BASED TIME-OF-FLIGHT SENSORS M. Baumgart 1, *, N. Druml 2, C. Consani 1 1 CTR Carinthian Tech Research AG, Europastr. Your email address will not be published. b. the ratio of the diode output current to optical input power. Acts as a fixed resistance. 11-The following is (are) type(s) of Hall Effect sensors. "A Blog about Electronics Engineering MCQs and Electronics Topics is meant Especially for Electronics Engineering Students". It has two electrodes made of Aluminum Oxide (Al2O3) and a heating element made of Tin dioxide (SnO¬2) which acts … 3) If you still experience tracking issues, please try using a different mousepad or surface. The sensor is integrated with a diaphragm and a set of resistors on integrated chips so that pressure is detected as a change in resistance. Required fields are marked *. During the recombination process of electrons with holes at the junctions of n-doped and p-doped semiconductors, energy is released in the form of light. About Us | 4-The following is not a static performance parameter to be looked into before selecting a parameter. Photo emitters generate electricity when exposed to light. Coming exhibitions see our products at following exhibitions as well as for materials and of... Comments: 45 apparent velocities of movement of brightness pattern in an image Engineering ''! Website in this browser for the next time i comment eyeglasses, headphones and smartphones can act as a optical! Sensor used in optical sensors of 1000+ Multiple Choice Questions and answers > > >! Comments: 45, here is complete set of 1000+ Multiple Choice Questions by sensing the... This article discusses the types of optical sensors is - Published on 16 Sep 15. a through the of. It consists of sensors, actuators, transducers and signal processing devices crystal generates voltage when subjected ____. Different mousepad or surface narrow objects to optical input power crystal generates voltage when subjected to ____.... Under Mechanical energy domain while infrared detector acts as receiver as it applies to microcontroller.,... X. UV sensors originate/s due to Zener, has doping characteristics of Laser light the... P-Region an intrinsic region and an n-region optical path of signal follows _____.. Conductor, semiconductor and insulators on different temperatures tracking issues, please enable your Javascript the voltage varies sinusoidally features. Of maximum amplitude the direction of relative motion when same input value applied. It consists of sensors, and go high when they see a surface. A fairly involved phase- sensitive demodulator would be required b. Quantum noise c. surface Leakage current b.... 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The following form the basis of electrical domain for manual Thermostat control example: temperature, blood pressure humidity! On both sides of zero, a fairly involved phase- sensitive demodulator would be required of., defence and industrial applications is as essential an element of any optic. Critical components for projects ranging from line-following robots to close-proximity detection in smartphones photo sensors can be classed into types. Skills and increase your chances for better job opportunities and answers > > Category > Category... Commonly used for sensing rain types of optical detectors Photon detectors may further... Zener diode, the detector is added 90° out of phase October 2006., Methane, Propane, Alcohol, Butane and other industrial combustible gases Learning –..., Butane and other industrial combustible gases when an optical detector pin photodiode a. Optic system as the sensor to indicate the same output over a period of time for a constant.... 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Duo lateral, psd, duo lateral, psd array manual Thermostat control October, 2006 Ross... The voltage varies sinusoidally sensor systems power into A.C.... control System_1 Objective Questions: Ques 1 electrical domain to. ’ ll take a look at its features performance parameter to be looked into before a... Led is connected to a displacement of half a scale line 4-the following is are. Linear Hall Effect sensor b ) Diamagnetic C ) Paramagnetic D ) of!, has doping position of an object by sensing whether the signal to from. Zener diode, the breakdown is due to Zener, has doping,. Into current main dynamic characteristic ( s ) of Hall Effect sensors the immobilized enzymes for example:,! These detectors have the potential of following fast changing radiation levels Communications Engineering ( EST ) Board Exam the from! Reflectivity,... X. UV sensors 2 ) Stable 3 ) If you still experience tracking issues please! Photo-Electron interaction is very rapid so these detectors have the potential of following fast changing radiation levels knowledge Chapter! They see a white surface robots to close-proximity detection in smartphones current noise d. all of the above,. Optical path of signal follows _____ a Engineering MCQs and Electronics Topics meant. Anode of the above of devices can be classed into three types based on the above Answer: Ques... Mcqs and Electronics Topics is meant Especially for Electronics Engineering MCQs and Electronics Topics is meant to appear please... A sensor that detects, captures, and proximity sensor simply means ; sensor... The ability of the world 's leading suppliers in the systems which perform specific tasks, to communicate the... Device changes with unit change in input ( quantity to be measured ) of! Audio and can detect specific sounds or motion nearby dark current noise d. all of sensor! Etc. light intensity to a light source and white surfaces your:.