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 Your email address will not be published.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 Your email address will not be published.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