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Q10: The width of the depletion region is, Answer: (b) inversely proportional to the doping, Your email address will not be published.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 The p-side has an excess of … Your email address will not be published.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