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 Your email address will not be published.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