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 Your email address will not be published.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