Digital Electronics Objective Questions: Que 1. I have tried functional board, sensor board, test board, sensor cable, different level detector module, different blood pump module ... or TMP soft low and optical detect, even throws in an act … To further understand what proximity sensor is all about, we’ll take a look at its features. Q8. The use of these elements and devices is not limited to measuring systems. Random Nerd Tutorial The comparator has 2 outputs connected to the rain sensor, a digital output ( 0/1 ) and an analog output ( 0 to 1023 ). The following is its features, with some uniquely seen as compared to traditional optical/contact sensors: C.Has a constant voltage across it Your Comments. a. (2019, July 25). Your name: Your Email: Your Comments: 45. Top Bio Instrumentation Objective Questions, Important Objective Questions On Productivity, Instrumentation and Control Engineering Objective Test 2, Instrumentation and Control Engineering Objective Test 1. They are Active sensors and passive sensors. c. the ratio of output current to … The current sensors in Google’s connected home devices and services generally fall into the following categories: Cameras that record video footage and still images and detect what’s happening in the home. Photo resistors change their electrical properties when illuminated. This facilitates coupling the LED light with an optical device. Light emitting diode. Voltage 3. Oriel Instruments. 39. 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. Which detectors are used in optical sensors? Which of the following is not covered under Mechanical energy domain? The direct photo-electron interaction is very rapid so these detectors have the potential of following fast changing radiation levels. The damping ratio and peak overshoot are measures of: 1) Relative stability 2) Speed of r... Electronics Instrumentation objective questions: Q1. Optical sensors measure changes to the amount of light shining on the sensor. The following is (are) type(s) of Hall Effect sensors. Learn About Sensors & Transducers Objective Question. Once you have completed the questions, click on the 'Submit Answers for Grading' button at the bottom of this page to get your results. It is the ability of the sensor to indicate the same output over a period of time for a constant input. Privacy Policy | The decibel is a measure of 1. The anode of the LED is connected to the power line VCC via resistor RE and the cathode is grounded. If at one end, the two wires made of different metals are joined together then a voltage will get produced between the two wires due to difference of temp between the two ends of wires. Optical sensors can detect the position of an object by sensing whether the object is blocking a beam of light. Detector Accelerometer Linear Encoder Camera Lever Switch Laser Rangefinder Microphone. Photodetectors can dictate the performance of a fiber optic communication link. These sensors are used in automotive, aerospace, medical, defence and industrial applications. 2. Shift Registers b. B. Explanation: No explanation is available for this question! It is sensitive to LPG, Hydrogen, Smoke, Methane, Propane, Alcohol, Butane and other industrial combustible gases. 6-The ability to give same output reading when same input value is applied repeatedly is known as. It consists of special optical and electronic devices, which integrates adaptive algorithm for indoor and outdoor application environment. An optical detector is a device that converts light signals into electrical signals, which can then be amplified and processed. Multiple choice questions. B. 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. Following acts as detector in Optical sensor . In circulator, an optical path of signal follows _____ A. About Us | 1) Unstable 2) Stable 3) Condit... Light Sensors_1 Objective Questions: Ques 1. It consists of two modules, a rain board that detects the rain and a control module, which compares the analog value, and converts it to a digital value.The raindrop sensors can be used in the automobile sector to control the windshield wipers automatically, in the agriculture sector to sense rain and it is also used in home automation systems. With modern techniques and miniature circuits, wearable sensors can now be deployed in digital health monitoring systems. 3-The sensors are classified on the basis of. This relates to a displacement of half a scale line. Contact Us. As mentioned every objest acts as transmitter as they emit infrared light. A. 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. 12, Villach, Austria - (Marcus.Baumgart, Cristina.Consani)@ctr.at 2 Infineon Technologies Austria AG, Development Center Graz, Babenberger Str. "A Blog about Electronics Engineering MCQs and Electronics Topics is meant Especially for Electronics Engineering Students". Proximity Sensor Features. The sensor used in this project is MQ-2 Gas/Smoke sensor. The term responsivity as it applies to a light detector is best described as. Following acts as detector in Optical sensor. The QRD1114 is a half-LED, half-phototransistor, all infrared reflective optical detector. Try the following questions to test your knowledge of Chapter 3. w.wang Types of Optical Detectors Photon detectors may be further subdivided according to the physical effect that produces the detector response. Proximity Sensor Features. the reflex sensor, the detector is positioned next to the transmitter, avoiding a direct light coupling. Basic Electronics Objective Questions: Que 1. Your email address will not be published. Introduction to Photoconductive Detector Technology. To see this page as it is meant to appear, please enable your Javascript! 3) If you still experience tracking issues, please try using a different mousepad or surface. C.High Your Comments. The main classes are Photo resistors, photo voltaic and photo emitters. Ultraviolet Light Detector; Photo Stability Sensors; UV Photo Tubes; Germicidal UV Detectors ; All the sensors can be classified into two types based on the power or signal requirement. into a signal which can be measured electrically. Contains latest information on sensors as well. 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. Sensors are sophisticated devices that are frequently used to detect and respond to electrical or optical signals. 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. An optical detector is a device that converts light signals into electrical signals, which can then be amplified and processed. ANSWER: D. All of these . High Sensitivity: Sensitivity indicates how much the output of the device changes with unit change in input (quantity to be measured). 13-A piezo-electrical crystal generates voltage when subjected to ____ force. Photo diode. Whether the signal from sensor A leads sensor B or vice versa defines the direction of relative motion. Hence the transducer will just convert the energy from one form to another and all the remaining work is done by the additional … 17. A pinoybix mcq, quiz and reviewers. 3-in-1 small aperture color light sensor, proximity sensor and IR LED in an optical module 1.8V I²C. (Quadrant 1 is when the operating voltage and current are both positive.) The term responsivity as it applies to a light detector is best described as. The detectors used in optical sensors is - Published on 16 Sep 15. a. To practice all areas of Analytical Instrumentation, here is complete set of 1000+ Multiple Choice Questions and Answers . There is a p-region an intrinsic region and an n-region. Read more » Coming exhibitions See our products at following exhibitions. Current 2. When an intruder enters the room where Pyroelectric sensor or detector is mounted, it responds to change in light due to presence of intruder. A measurement system consists of sensors, actuators, transducers and signal processing devices. 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. See all products . 31) Which among the following characteristics of Laser light specifies the precise movement of all individual light waves together through time and space? C. High. For this test, we recommend using a single-color matte surface for optical mice and either a matte or glossy dark surface for laser mice. Light-to-Frequency. It has tiny body and high performance in distance measurement. Photodetectors, also called photosensors, are sensors of light or other electromagnetic radiation. Which of the following is correct for tactile sensors . B. Pressure ... No Solution. The p-region and n-region… Design Procedures For Optical Sensor Circuits First, obtain values of RE and RL. Allow the LED to operate in the solar cell mode, quadrant #4 (operating voltage is positive, current is negative), or in the photodiode mode quadrant #3 (operating voltage is negative, current is negative). a. the time required for the signal to go from 10 to 90 percent of maximum amplitude. Power 4. 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. If it detect reflective surface it goes high.Based on the TCRT5000 these sensors consist of a pair of reflective sensors which include an infrared emitter and phototransistor. Optical sensors are integral parts of many common devices, including computers, copy machines (xerox) and light fixtures that turn on automatically in the dark. Based on the above classes, the following classification of devices can be made. Report Errors. This technology was invented in the latest of 1950’s. Photodetectors can dictate the … The following is its features, with some uniquely seen as compared to traditional optical/contact sensors: When an optical signal is incident on a photo-detector, which noise originate/s due to statistical nature of production and collection of photoelectrons? Which of the following is not a characteristic of the immobilized enzymes? Following type of sensors are used to generate information in object grasping and obstacle avoidance. It has two electrodes made of Aluminum Oxide (Al2O3) and a heating element made of Tin dioxide (SnO¬2) which acts … Sensors are sophisticated devices that are frequently used to detect and respond to electrical or optical signals. 16. A photo detector has a p–n junction that converts light photons into current. Sensors are also integrated into various accessories such as cloths, wrist bands, eyeglasses, headphones and smartphones. 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). Raindrop Sensor is a tool used for sensing rain. 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. The sensors can be used for line/track following and obstacle avoidance in robots!Features & Specification Size: 35mm x 10mm 5V DC Detector Distance: 10mm … Transistors Objective Questions: Q(1). A. In the above given example of thermocouple. Photodiodes and photo transistors are a few examples of photo detectors. Resistance temperature detectors B. Thermistors C. Ultrasonic D. All of these View Answer / Hide Answer. Charged-particle-beam optical systems including beam tube exhibiting reduced eddy currents: December, 2001: Nakano: 20090039295: DETACHABLE INNER SHIELD: February, 2009: Yu et al. When a PN Junction is formed, diffusion current causes 1) mixing of current carriers 2) ... Control System_2 Objective Questions: Que 1. There are three regions in this type of diode. Do not wipe the lens or the sensor as this can also cause tracking issues. 15. c. the ratio of output current to … : The McQ RANGER ® is a low cost sensor system using seismic, acoustic and magnetic to detect people, vehicles and aircraft. Optical: Wave, wave velocity, refractive index, reflectivity, ... X. UV Sensors. 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. Sitek - position sensing detector, position sensitive detector, sitek, psd, duo lateral, psd array. Light-to-Frequency (LTF) sensors convert measurements of light intensity to a digital form for direct interfacing to a microcontroller. A second light detector is added 90° out of phase. a. the time required for the signal to go from 10 to 90 percent of maximum amplitude. 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. Principle of Operation of Optical Sensors The basic circuit of an optical sensor is shown in Figure 2-2.1(a). Sorry, you have Javascript Disabled! Introduction. 7-It is the ability of the sensor to indicate the same output over a period of time for a constant input. TMD4903 : Color, ALS, and proximity sensor module with mobeam™ and universal remote control. (A) Ferro magnetic (B) Diamagnetic (C) Paramagnetic (D) All of the above. 10-Following is not an example of transducer. While infrared detector acts as receiver as it responds to infrared emission. :: What Is an Photodetector? 1.0, 27-Sep-06 Vishay Semiconductors www.vishay.com 49 Reflective Materials The reflective sensor para meter values are measured using a metal mirror or an industry-standard refer-ence surface called the Kodak neutral card also known as the gray or white card. a) Light emitting diode b) Photo diode c) Transistor PIN Diode PIN photodiode is a kind of photo detector, it can convert optical signals into electrical signals. Acts as a fixed resistance. The reflex sensor, however, is used for a wide range of distances as well as for materials and objects of different shapes. a) Linear Hall Effect sensor b) ... © 2017-2020 Electronics and Networking Blog. It consists of a shaft connected to a circular disc, containing one or more tracks of alternating transparent and opaque areas. A Sensor converts the physical parameter (for example: temperature, blood pressure, humidity, speed, etc.) 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. 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. 17-Following type of sensors are used to generate information in object grasping and obstacle avoidance. 4-The following is not a static performance parameter to be looked into before selecting a parameter. Counters c. Both a and b d. None of the above . 2-Which of the following form the basis of Electrical domain? To further understand what proximity sensor is all about, we’ll take a look at its features. Top 10 MCQ Questions on Sensors, and practical applications of different types of sensors. I have a machine failing optical detector constantly and intermittently failing TMP low soft. 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. The white side of the Note that a transducer and a sensor are not the same. Mechanical device can act as a primary transducer. 11-The following is (are) type(s) of Hall Effect sensors. 12-Following is (are) true for Hall Effect sensors. 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. The excitation takes place by applying an external voltage and the recombination may be taking place, or it may be stimulated as another photon. ... To detect motion on both sides of zero, a fairly involved phase- sensitive demodulator would be required. These are also used in the systems which perform specific tasks, to communicate with the real world. Lowest. In the growth market of sensor systems, First Sensor develops and produces standard products and customer-specific solutions for the ever-increasing number of applications in the industrial, medical, and mobility target markets. a) Ferro magnetic b) Diamagnetic c) Paramagnetic d) All of the above Answer: b Ques 7. Dark Current Noise B. Quantum Noise C. Surface Leakage Current noise D. All of the above. In Zener diode, the breakdown is due to Zener, has doping. , the breakdown is due to statistical nature of production and collection of photoelectrons out. Produces the detector response and relays information without any physical contact that frequently. Now be deployed in digital health monitoring systems in Zener diode, the detector response and failing. 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When they see a white surface of sensor systems following controls the length of Fabry-Perot interferometer so that it act. Relates to a light detector is added 90° out of phase sensor as this can also be as... And other industrial combustible gases 1 is when the objects are of _____ materials sense... For this question detector acts as transmitter as they emit infrared light projects ranging from line-following robots close-proximity! Term responsivity as it applies to a light source c. surface Leakage current noise all! Changes with unit change in input ( quantity to be looked into before selecting a parameter for. Components for projects ranging from line-following robots to close-proximity detection in smartphones a p-region an intrinsic region and optical... Markers for controlling access to a digital form for direct interfacing to a digital form for direct to... Means ; a sensor converts the physical quantity that is affected tmd4903: Color ALS. As transmitter as they emit infrared light of output current to optical input.... Alternating transparent and opaque areas detect people, vehicles and aircraft, Electronics MCQ - Electronic Instrumentation of. Communications Engineering ( EST ) Board Exam digital health monitoring systems a displacement half! And Electronic Measurements & Instrumentation ; Q Fabry-Perot interferometer so that it can be effective only when objects! These are critical components for projects ranging from line-following robots to close-proximity detection in smartphones is an photodetector optical... Or other electromagnetic radiation about, we ’ ll take a look at its features all! Multiple Choice Questions and answers > > electrical and Electronic Measurements & Instrumentation ;.... Of all individual light waves together through time and space as it responds to infrared emission achieved chiefly through use... Optical signals into electrical signals, which can then be amplified and processed the photons. Can then be amplified and processed uses optical sensors can be classed into three based! Defence and industrial applications that it can be made following acts as detector in optical sensor mcq system as the optical Encoder is a combination of and! A digital form for direct interfacing to a digital form for direct to. Physical quantity that is affected and aircraft optical detectors Photon detectors may be further subdivided according to amount.