Q6. TEDx Talks Recommended for … (D) None of the above, Answer: (B) inversely proportional to the doping, Your email address will not be published. The photodiode can be used as a photodetector to detect optical signals. Topics provided are as per the NEET Physics Syllabus and covers both basic and advanced concepts. Faster than a calculator | Arthur Benjamin | TEDxOxford - Duration: 15:04. Multiple Choice Questions on Fiber Optic Devices & Instrumentation . Hence for a certain range of reverse voltage acro… (C) Inversely proportional, exponentially, unrelated, Answer: (A) Proportional, exponentially, proportional. (D) Both visible and invisible light, Answer: (D) Both visible and invisible light, 2. Q2: In using a photodiode as a photodetector, it is invariably reverse biased. To make it easy for you we have compiled Topic Wise MCQ of Physics for a smooth searching experience. (C) Only if the diode is reverse biased light variations can be converted into current variations Try the following questions to test your knowledge of Chapter 3. When a diode is forward biased, the recombination of free electron and holes produce (C) The phototransistor can heavily doped than the photodiode [All India 2009 C] Ans.Zener diode, which is used as a DC voltage regulator. (D) PIN current, 8. A pinoybix mcq, quiz and reviewers. IMPATT diode is. The capacitance of a passive capacitance transducer depends on the following factors, except? (B) False, 5. (B) Light (B) Only when the photodiode is reverse biased the incident photons produce electron-hole pairs a. (C) Radiation Q6: What is the reason phototransistor produces more current than a photodiode? MORE MCQ ☰ More Mcq >Diode >Semiconductor ☰ More Q & A >Steam Engine >Steam Turbine >Steam Boiler >Thermal Power Plant >Nuclear Power Plant >Hydro Electric Power Plant >Laws of thermodynamics; Diode Multiple Choice Questions Answers; 26. (b) Invisible light. B. Important Mcq Questions !! Answer: (D) When photons are incident on the diode, the fractional change in the reverse current is much greater than the fractional change in the forward current. (D) When photons are incident on the diode, the fractional change in the reverse current is much greater than the fractional change in the forward current. (B) 700 nm A pn-junction diode emits light by spontaneous emission (a) LED (b) APD (c) PIN diode (d) Zener diode. Direction of electron flow. Solar cell is also known as large area photodiode because it converts solar energy or light energy into electric energy. MCQ on Pn Junction Diode The interface or the boundary between the p-type and n-type semiconductor is called PN junction. Q3: The maximum wavelength of photons that can be detected by a photodiode made by a semiconductor of bandgap 2eV is about, Q4: The presence of dark current decreases the sensitivity of the photodiode to light. The maximum wavelength of photons that can be detected by a photodiode made by a semiconductor of bandgap 2eV is about Q1: Photodiode is used in the detection of . The photodiode generates current when exposed to light. B. Zener diode. (d) Both visible and invisible light. A. C. Relative dielectric constant. Name the device and write where it is used. (C) 740 nm So these NEET Physics MCQs and Answers for all Concepts as per the new syllabus. A negative conductance microwave device; A high frequency rectifying device; A degenerate semiconductor device; A bulk negative differential conductance device; Answer – (1) 7. MCQs on Photodiode. 5.State the relation between the frequency v of radiation emitted by LED and the band gap energy E, of the semiconductor used to fabricate it. Visible light; Invisible light; No light; Both visible and invisible light; Answer: (d) Both visible and invisible light. Determine photocurrent. The light is absorbed ……….with distance and is ………..to the absorption coefficient. (D) All the above, 10. (A) Visible light (B) Invisible light When a diodeis in reverse biased condition, there would be a reverse saturation current flowing through it from positive to the negative terminal of the diode. (D) 1240 nm, 4. Home » NEET Physics Objective Questions » 300+ TOP MCQs on Photodiode and Answers, NEET  Physics is the very imporatant paper in the Medical Entrance EXAM. When the junction of the photodiode is illuminated, then the electric current starts flowing. At low light conditions, a photodiode is used. The unavoidable minority charge carriers cause this reverse saturation current in the semiconductor crystal. Here… The power consumption is much reduced compared to reverse biased condition (B) Dark current Q5: Photodiodes operate by absorption of photons or charged particles and generate a flow of current in an external circuit,……….. to the incident power. Most Asked Technical Basic CIVIL | Mechanical | CSE | EEE | ECE | IT | Chemical | Medical MBBS Jobs Online Quiz Tests for Freshers Experienced. The diode used for a power limiter is. Try this amazing Photodiode Quiz: How Much You Know? (B) inversely proportional to the doping Part 2 - Duration: 29:17. EEE IQ 696,884 views. If photons excite carriers in a reverse-biased pn junction, a very small current proportional to the light intensity flows. Answer: (c) The current produced by photons is amplified by the hfe of the transistor, Q7: In a photodiode, when there is no incident light, the reverse current is almost negligible and is called, Q8: Compared to a photo-diode, which of the listed advantages and disadvantages would be expected of a phototransistor, Answer: (c) Slower response and greater sensitivity, Q9: When a diode is forward biased, the recombination of free electron and holes produce, Q10: The width of the depletion region is, Answer: (b) inversely proportional to the doping, Your email address will not be published. Laser light is _____emission (a) Coherent (b) Stimulated (c) Spontaneous (d) Coherent and stimulated. (A) True This set of Optical Communications Multiple Choice Questions & Answers (MCQs) focuses on “Semiconductor Photodiodes With Internal Gain”. D. Photodiode. Basic electronics Important Multiple choise question MCQ, Semiconductor diode important questions and answers that is very important for all examination, (D) Slower response and less sensitivity, Answer: (C) Slower response and greater sensitivity, 9. Your email address will not be published. Practice "Special Purpose Diodes" quiz, photodiode Multiple Choice Questions (MCQs) to practice electronic devices test with answers for online electrical engineering degree. a) 1.482 b) 2.457 c) 4.124 d) 3.199 View Answer. (B) Proportional, logarithmically, inversely proportional The arrow direction in the diode symbol indicates a. The area of the two parallel plates. low resistance in MCQs on Photodiode : 1. The p-side has an excess of … Photodiode is very sensitive to light so when light or photons falls on the photodiode it easily converts light into electric current. 010203040506070809101112131415161718 A PN junction offers high resistance in forward as well as reverse direction. The photodiode; The LED; Answer – (2) 6. P N JUNCTION DIODE Multiple Choice Questions - 2 1. Q7. If a photodiode requires incident optical power of 0.70 A/W. In a photodiode, when there is no incident light, the reverse current is almost negligible and is called In using a photodiode as a photodetector, it is invariably reverse biased (A) Heat (C) Photocurrent (A) The power consumption is much reduced compared to reverse biased condition (A) A wider spectrum is accepted by the phototransistor than the photodiode Answer: (a) Proportional, exponentially, proportional. _____ has more sophisticated structure than p-i-n photodiode. Diode and Application Electronics MCQs" is the set of frequently asked Multiple Choice questions and these MCQs are asked in different test in the past in different test. The Following Section consists Multiple Choice Questions on Diodes and Applications. NEET Physics Photodiode Multiple Choice Questions, 1. Q1: Photodiode is used in the detection of, Answer: (d) Both visible and invisible light, Q2: In using a photodiode as a photodetector, it is invariably reverse biased. Construction of LED, that is physical dimensions B. Your email address will not be published. Compared to a photo-diode, which of the listed advantages and disadvantages would be expected of a phototransistor (A) Zener current Note: Reverse current flows through the photodiode when it is sensing light. It works on the principle of the photoelectric effect. (C) Independent of doping (B) The current produced by photons is amplified by the hfe of the transistor Sanfoundry Global Education & Learning Series – Optical Communications. (c) No light. Required fields are marked *, How to Score 170 Plus in NEET Physics 2020, Last Minute Preparation Tips for NEET Physics. A pinoybix mcq, quiz and reviewers. 1. Photodiode is used in the detection of. Once you have completed the questions, click on the 'Submit Answers for Grading' button at the bottom of this page to get your results. Answer. a) Avalanche photodiode b) p-n junction diode c) Zener diode d) Varactor diode View Answer . The value of this reverse saturation current does not depend on the applied reverse voltage across the diode rather it depends on the concentration of minority charge carriers in the semiconductor crystal. Answer: (C) The current produced by photons is amplified by the hfe of the transistor, 7. The presence of dark current decreases the sensitivity of the photodiode to light Try this amazing MCQ Set 1 - Transistor Fundamentals quiz which has been attempted 1503 times by avid quiz takers. The colour of emitted light from LED depends on. Practice daily with these NEET Physics objective questions on air pollution . 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Photodiode is used in the detection of (A) Visible light (B) Invisible light (C) No light (D) Both visible and invisible light. Mushroom Waveguide Photodiode b. 37) Which photodiodes are crucially applicable to overcome the bandwidth-quantum efficiency trade-off along with its resemblence to the pyramid structure? 3. The light is absorbed ……….with distance and is ………..to the absorption coefficient. (A) 620 nm D. Signal diode View Answer. Answer. Photodiodes work in reverse biased mode. Required fields are marked *. Take the Quiz and improve your overall Engineering. A. ANSWER: (a) Mushroom Waveguide Photodiode (b) Electron and hole ionization rates are almost equal. b. 6. Traveling Wave Photodiode c. Resonant Cavity Photodiode d. All of the above. Multiple choice questions. (A) Proportional, exponentially, proportional Number of available carriers C. Type of semiconductor material used D. Number of recombinations taking place The width of the depletion region is Answer: (d) When photons are incident on the diode, the fractional change in the reverse current is much greater than the fractional change in the forward current. C.PIN diode Your Comments. Distance between the two parallel plates. (C) No light Avalanche Photodiode pni E • limited gain-bandwidth product • higher avalanche noise (c) Electron ionization rate is larger than hole ionization rate • large gain-bandwidth product • lower avalanche noise (a) p-i-n diode in high electric field (105V/cm) results in impact ionization. (A) Directly proportional to the doping December 5, 2020 December 4, 2020 rashmi. Operation of Gunn diode is explained with. Zener current; dark current; photo current; PIN current (D) At low light conditions, a photodiode is used. Light Emitting Diode or LED objective questions and answers. MCQ on Fiber Optic Devices & Instrumentation. Also explore over 10 similar quizzes in this category. (a) Visible light. 1. Photodiodes operate by absorption of photons or charged particles and generate a flow of current in an external circuit,……….. to the incident power. 26. Direction of hole flow (Direction of conventional current) What is the reason phototransistor produces more current than a photodiode? (C) Slower response and greater sensitivity (adsbygoogle = window.adsbygoogle || []).push({}); Engineering interview questions,Mcqs,Objective Questions,Class Lecture Notes,Seminor topics,Lab Viva Pdf PPT Doc Book free download. It can also be called a photodetector or photosensor. MCQ in Industrial Electronics Part 10 of the series as Electronics Engineering topic in ECE Board Exam. … A. (A) Faster response and greater sensitivity 29:17. 6.Figure show the I-V characteristics of a given device. (B) Faster response and less sensitivity Answer: (d) Both visible … MCQ in Special Purpose Diodes from the book Electronic Principles by Albert Malvino. –Photodiodes are designed to detect photons and can be used in circuits to sense light. Also explore over 113 similar quizzes in this category. Photodiode quiz questions and answers, photodiode MCQ with answers PDF 42 to study electronic devices for online degree courses. Power diode. MCQ: In photodiode, when there is no incident light, thereverse current is almost negligible and is called. C. PIN diode. D. Mass of the two parallel plates. Photodiode is used in the detection of However, solar cell works only at bright light. Copyright 2020 , Engineering Interview Questions.com. quiz which has been attempted 1392 times by avid quiz takers. Answer: b Explanation: The Responsivity of photodiode is given by R = Ip/Po Ip = R*Po = 0.70*3.51*10-6 = 2.457μm. 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