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 Your email address will not be published.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 (D) None of the above, Answer: (B) inversely proportional to the doping, Your email address will not be published.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