(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. [All India 2009 C] Ans.Zener diode, which is used as a DC voltage regulator. MCQ on Fiber Optic Devices & Instrumentation. (b) Electron and hole ionization rates are almost equal. (B) Light The light is absorbed ……….with distance and is ………..to the absorption coefficient. Your email address will not be published. (B) The current produced by photons is amplified by the hfe of the transistor The unavoidable minority charge carriers cause this reverse saturation current in the semiconductor crystal. When the junction of the photodiode is illuminated, then the electric current starts flowing. Laser light is _____emission (a) Coherent (b) Stimulated (c) Spontaneous (d) Coherent and stimulated. Copyright 2020 , Engineering Interview Questions.com. Number of available carriers C. Type of semiconductor material used D. Number of recombinations taking place (D) PIN current, 8. (c) No light. NEET Physics Photodiode Multiple Choice Questions, 1. 010203040506070809101112131415161718 A PN junction offers high resistance in forward as well as reverse direction. b. Construction of LED, that is physical dimensions B. (D) None of the above, Answer: (B) inversely proportional to the doping, Your email address will not be published. Mushroom Waveguide Photodiode b. (C) Radiation Try this amazing Photodiode Quiz: How Much You Know? A pn-junction diode emits light by spontaneous emission (a) LED (b) APD (c) PIN diode (d) Zener diode. Traveling Wave Photodiode c. Resonant Cavity Photodiode d. All of the above. Photodiode is used in the detection of (A) Visible light (B) Invisible light (C) No light (D) Both visible and invisible light. Distance between the two parallel plates. (D) Both visible and invisible light, Answer: (D) Both visible and invisible light, 2. 6.Figure show the I-V characteristics of a given device. If photons excite carriers in a reverse-biased pn junction, a very small current proportional to the light intensity flows. Q6. 3. Faster than a calculator | Arthur Benjamin | TEDxOxford - Duration: 15:04. (A) Directly proportional to the doping The p-side has an excess of … Power diode. C. Relative dielectric constant. Name the device and write where it is used. Answer: b Explanation: The Responsivity of photodiode is given by R = Ip/Po Ip = R*Po = 0.70*3.51*10-6 = 2.457μm. (D) 1240 nm, 4. Answer: (a) Proportional, exponentially, proportional. Hence for a certain range of reverse voltage acro… (A) Zener current (D) At low light conditions, a photodiode is used. The colour of emitted light from LED depends on. MCQs on Photodiode. (C) 740 nm ANSWER: (a) Mushroom Waveguide Photodiode Take the Quiz and improve your overall Engineering. Photodiodes work in reverse biased mode. Q5: Photodiodes operate by absorption of photons or charged particles and generate a flow of current in an external circuit,……….. to the incident power. (C) Slower response and greater sensitivity Also explore over 113 similar quizzes in this category. B. Zener diode. (A) 620 nm 6. Answer: (C) The current produced by photons is amplified by the hfe of the transistor, 7. (B) Only when the photodiode is reverse biased the incident photons produce electron-hole pairs The area of the two parallel plates. (A) Faster response and greater sensitivity (A) A wider spectrum is accepted by the phototransistor than the photodiode MCQ: In photodiode, when there is no incident light, thereverse current is almost negligible and is called. (B) Proportional, logarithmically, inversely proportional Visible light; Invisible light; No light; Both visible and invisible light; Answer: (d) Both visible and invisible light. A pinoybix mcq, quiz and reviewers. 26. a. P N JUNCTION DIODE Multiple Choice Questions - 2 1. 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. (A) Proportional, exponentially, proportional Answer. 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. In a photodiode, when there is no incident light, the reverse current is almost negligible and is called The photodiode generates current when exposed to light. Operation of Gunn diode is explained with. Required fields are marked *. Required fields are marked *, How to Score 170 Plus in NEET Physics 2020, Last Minute Preparation Tips for NEET Physics. _____ has more sophisticated structure than p-i-n photodiode. Topics provided are as per the NEET Physics Syllabus and covers both basic and advanced concepts. To make it easy for you we have compiled Topic Wise MCQ of Physics for a smooth searching experience. 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. Photodiode is used in the detection of Try this amazing MCQ Set 1 - Transistor Fundamentals quiz which has been attempted 1503 times by avid quiz takers. (B) 700 nm (d) Both visible and invisible light. A pinoybix mcq, quiz and reviewers. MCQs on Photodiode : 1. Photodiode is used in the detection of. 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) inversely proportional to the doping 37) Which photodiodes are crucially applicable to overcome the bandwidth-quantum efficiency trade-off along with its resemblence to the pyramid structure? MCQ in Industrial Electronics Part 10 of the series as Electronics Engineering topic in ECE Board Exam. (A) True For the sake of your convenience, we even jotted the Solutions for NEET Physics MCQ Questions which you can cross-check during your practice. This set of Optical Communications Multiple Choice Questions & Answers (MCQs) focuses on “Semiconductor Photodiodes With Internal Gain”. The photodiode; The LED; Answer – (2) 6. Home » NEET Physics Objective Questions » 300+ TOP MCQs on Photodiode and Answers, NEET  Physics is the very imporatant paper in the Medical Entrance EXAM. A negative conductance microwave device; A high frequency rectifying device; A degenerate semiconductor device; A bulk negative differential conductance device; Answer – (1) 7. Note: Reverse current flows through the photodiode when it is sensing light. Solar cell is also known as large area photodiode because it converts solar energy or light energy into electric energy. a) 1.482 b) 2.457 c) 4.124 d) 3.199 View Answer. (C) Independent of doping A. Important Mcq Questions !! Q2: In using a photodiode as a photodetector, it is invariably reverse biased. MCQ in Special Purpose Diodes from the book Electronic Principles by Albert Malvino. a) Avalanche photodiode b) p-n junction diode c) Zener diode d) Varactor diode View Answer . Direction of hole flow (Direction of conventional current) (A) Heat (D) Slower response and less sensitivity, Answer: (C) Slower response and greater sensitivity, 9. What is the reason phototransistor produces more current than a photodiode? Direction of electron flow. (C) The phototransistor can heavily doped than the photodiode Q7. (B) Dark current C.PIN diode Your Comments. If a photodiode requires incident optical power of 0.70 A/W. The photodiode can be used as a photodetector to detect optical signals. However, solar cell works only at bright light. 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