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