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This movement of holes is available for conduction. The contact grid must be large enough to collect electrons yet cover as little of the solar cell’s surface, allowing more photons to penetrate. For good solar cell, this must be small. A. Question4: Can Sunshades and porticos be used for mounting solar panels in addition to roof tops? The antireflective layer channels the photon into the lower layers of the solar cell.Once the photon passes the anti reflective layer, it will either hit the silicon surface of the solar cell or the contact grid metallization. 48. Cogito Ergo Sum View Answer / Hide Answer A.A solar cell, or photovoltaic cell, is an electrical device that converts the energy of light directly into electricity by thephotovoltaic effect.. Q.Explain the operation of photovoltaic cell. The viva is for enhancing the understanding of the experiments. C. The Antireflective Coating (AR Coating)– Through a combination of a favorable refractive index, and thickness, this layer serves to guide light into the solar cell. 3- Record the solar cell current and observe the turn speed of the propeller of the electric motor. Parallel arrangement of solar cells. 6.What is short circuit … B. E. P-Type Silicon– P-type silicon is created by doping with compounds containing one less valence electrons* than Si does, such as with Boron. When silicon (four valence electrons) is doped with atoms that have one less valence electrons (three valence electrons), only three electrons are available for bonding with four adjacent silicon atoms, therefore an incomplete bond (hole) exists which can attract an electron from a nearby atom. How Planck’s constant is determined?”Planck’s constant is determined by using the light-emitting diode. Ans. Q.What is Hall Effect? Inversely, in the p-type silicon layer, electrons are termed minority carriers and holes are termed majority carriers, and of course are also mobile. A.A solar cell, or photovoltaic cell, is an electrical device that converts the energy of light directly into electricity by thephotovoltaic effect. Write short notes on cytoplasmic matrix. The balance of good and bad awaits your vision. • Those can, claim: Solar energy is tenuous, un-dependable, and expensive beyond practicality. Q. The Institute The Indian Institute of Technology (IIT) Kharagpur was established in May 1950 and started its academic programme in August 1951. Why does a secondary cell provide more current than a primary cell of same e.m.f. Filling one hole creates another hole in a different Si atom. A secondary cell has a very low value of internal resistance. Questions and Discussion Experiments with Solar Cell (from Solar Kit) Zdeňka Koupilová1 Solar energy is more and more used in everyday life. Change ), You are commenting using your Facebook account. View all posts by Divya Prakash Srivastava, energy, engineering, examination, experiment, information, Physics, physics lab, practicals, solar cell, viva, vivavoce, about solar cell, electricity, engineering, expermentation, laboratory, light, physics, physics viva, power, semiconductor, solar, solar cell, solar cell information, solar cell viva, viva, viva physics, vivavoce, what is solar cell. In addition to everyday objects such as solar calculators or solar garden lamps, photovoltaic power plants are becoming more and more common. ( Log Out /  Which of the two cells, the primary or the secondary, is used in automobiles and why ? A. characteristics. A.Yes it does the photon’s energy transfers to the valence electron of an atom in the n-type Si layer. Name two important functions of G proteins. JUNCTION DIODES Questions and Answers pdf :-1. PHYSICS LAB VIVA-QUESTIONS Torsional Pendulum: 1. Draw Golgi apparatus and label its parts. That energy allows the valence electron to escape its orbit leaving behind a hole. 22 Series arrangement of solar cells. In principle, thermometers made of different material (e.g., coloured alcohol thermometers) might be expected to give different intermediate readings due to different expansion properties; in practice the substances used are chosen to have reasonably linear expansion characteristics as a function of true thermodynamic temperature, and so give similar results. 0.26 V C. 1.1 V D. 2 V I–V Characteristics of Zener Diode. Enter the code above here : The efficiency of a solar cell may be in the range, 49. A simple solar cell experiment The following experiment was performed using a commercial polycrystalline silicon solar cell with an active area of 8.5 cm X … APPARATUS: Photo cell (Selenium) mounted in the metal box with connections brought out at terminals, Lamp holder with 60W bulb, Two moving coil analog meters (1000µA & 500mV) mounted on the front panel and connections brought out at terminals, Two single point and two Black box experiment; Identification of unknown passive electrical components and determine the value of Inductance and Capacitance 2. CELL BIOLOGY LAB VIVA Questions and Answers :-1. VIVA QUESTIONS How Planck’s constant is determined? However, there are ambivalent views about solar, or photovoltaic, cells' ability to supply a significant amount of energy relative to global needs. Tables, students should answer the data summary questions listed in the Lab Activity. These technologies sound good in theory, but we have been hearing for a long time about “the coming solar revolution” or about how our dependence on fossil fuels will soon be “gone with the wind”… and yet fossil fuels still continue to reign supreme. Q.Explain the operation of photovoltaic cell. Expected Observations Students should see the effects of more and less light and different wavelengths of light on the PV cell and of the cell’s temperature. ( Log Out /  A typical output of a solar cell is . Solar Cell Multiple Choice Questions and Answers. Physics Lab(15PHYL17/27) Viva Questions: EXPERIMENTS: 1. Solar cell 67 Checklist for Expt. Each solar panel consists of 12 individual solar cells connected in series. An instrument for measuring an electromotive force by balancing it against the potential difference produced by passing a known current through a known variable resistance. Since only four electrons are required to bond with the four adjacent silicon atoms, the fifth valence electron is available for conduction. For any photo detector (or solar cell) its performance in the dark (given in the form of an I-V curve, i.e. ? c. Series and parallel arrangement of solar cells. 4. 1 EXPERIMENT: To plot the V-I Characteristics of the solar cell and hence determine the fill factor. 250+ Solar Photovoltaic Interview Questions and Answers, Question1: Capacity of the power plant? Which of the following material is used in solar cells? 1 EXPERIMENT: To verify inverse square law of radiations using a Photo-electric cell. 46. Indulge into some deep and suspenseful blogs here. In the n-type silicon layer, the free electrons are called majority carriers whereas the holes are called minority carriers. Solar cell is which biased? 2. Solar Power - MCQs with answers Q1. A solar cell is a semiconductor PN junction diode as shown in figure 1. Viva Voce Questions on Polarimeter . • Those pro, contend: Solar energy is abundant, in­ exhaustible, clean, and cheap. The metallization, being opaque, lowers the number of photons reaching the Si surface. R s R= R series. A typical output of a solar cell is. Q.how does the photon proceed in a solar cell? ... vtu 3rd sem CSE branch,EC lab VIVA question and answers… Ans. 47. D. N-Type Silicon – N-type silicon is created by doping (contaminating) the Si with compounds that contain one morevalence electrons* than Si does, such as with either Phosphorus or Arsenic. Click here to refresh, © 2015 - 2020 MechanicalTutorial.com This Content is copyrighted By MechanicalTutorial.com |All Rights Reserved. The terms forward bias and reverse bias do not apply to a source. The LED works on the principle of semiconductor diode, to flow the current from n to p-type semiconductor a minimum potential is required. Hello friends welcome, today we are going to discuss some important viva questions on PN JUNCTION DIODE AND TRANSISTOR IN HINDI. View all posts by Divya Prakash Srivastava. Solar cell is the basic unit of solar energy generation system where electrical energy is extracted directly from light energy without any intermediate process. b. A. Which of the following constitutes the major load for an automobile battery? After a photon makes its way through the encapsulate it encounters the antireflective layer. 3. APPRATUS REQUIRED: Solar cell mounted on the front panel in a metal box with connections brought out on terminals. Viva questions are not to be written in the journal All rest of the matter is to be written as it is. Satellite power requirement is provided through. Ans. solar cell increases with the increase in the amount of solar radiation incident on the active area of the cell. The operation of a photovoltaic (PV) cell requires 3 basic attributes: Q.What are the different layers of a solar cell? 0.1 V B. For good solar cell, this must be large. A. 50. = series. Q.Does the presence of photon result in photoelectric effect? Without this layer, much of the light would simply bounce off the surface. The photovoltaic effect was experimentally demonstrated first by French physicist Edmond Becquerel. R p = R shunt. Secondary cell is used because it delivers the desired large starting current due to its low internal Sir, I am determining the specific rotation of cane sugar solution with the help of Laurentz half shade polarimeter (or Bi-quartz polarimeter, as the case may be). What are G proteins? What are you doing ? Two meters mounted on the front panel to measure the solar cell voltage and current. Equivalent Circuit Diagram of Solar Cell . Experiment 8. A.It is numerically equal to Hall electric field induced in… A module in a solar panel refers to a. What is a pn junction? Viva Voce Questions on Polarimeter . 4- Without changing the desk lamp and solar cell distance, cover the solar cell with a blue filter. 5- Record the cell current in table 3. Draw a diagram to explain the processes of endocytosis and … The working of a solar cell solely depends upon its photovoltaic effect hence a solar cell also known as photovoltaic cell.A solar cell is basically a semiconductor device. ( Log Out /  Change ), An ongoing discussion about SAP infrastructure. Can't read the image? Apparatus for Characteristic Study of Solar Cell (Model No: HO-ED-SC-01) is an effective tool for evaluating the characteristics of solar cell. Life is all about Experiences. Contact Grid– The contact grid is made of a good conductor, such as a metal, and it serves as a collector of electrons. 8 70 Viva voce for Expt.81 71 . 5.What is the graph of solar cell gives? J 01 J 02 Rp Rs b 1 b 2 V ja V Image by MIT OpenCourseWare. The contact surface between the layers of p-type and n-type semiconductor pieces plated together so as … The photovoltaic effect was experimentally demonstrated first by French physicist Edmond Becquerel. ( Log Out /  Question3: What happens when the solar energy generated is more than what we need or if it is less than what we need? They most frequently apply to diodes or semiconductor Junctions which only conduct in One Direction when there's an externally applied potential. A. Contact us: info@mechanicaltutorial.com. Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. Viva Voce Questions on Polarimeter . 46. Solar V cell I Use the flux meter to determine the input intensities (be sure you understand the scale). Solar cell, also called photovoltaic cell, any device that directly converts the energy of light into electrical energy through the photovoltaic effect.The overwhelming majority of solar cells are fabricated from silicon—with increasing efficiency and lowering cost as the materials range from amorphous (noncrystalline) to polycrystalline to crystalline (single crystal) silicon forms. Change ), You are commenting using your Google account. Q.34. This apparatus allows students in introductory physics course to plot I-V characteristics of a solar cell by a simple experiment. F. Back Contact – The back contact, made out of a metal, covers the entire back surface of the solar cell and acts as a conductor. Change ), You are commenting using your Twitter account. A.When a current carrying conductor is placed in a magnetic field mutually perpendicular to the direction of current a potential difference is developed at right angle to both the magnetic and electric field.This phenomenon is called Hall effect. In this video we will Study the Characteristics of Solar cell. Normally no external bias is applied to the cell. In this experiment you will investigate the variation of Isc with G for 2 small solar panels connected in series. A. Encapsulate – The encapsulate, made of glass or other clear material such clear plastic, seals the cell from the external environment. The operation of a photovoltaic (PV) cell requires 3 basic attributes: As the term “carrier” implies, both are able to move throughout the silicon layer of the solar cell, and so are said to be mobile. Series and parallel LCR Circuits (Determination of resonant frequency and quality factor) 3. 2- Connect the solar cell with the electric motor and a DMM to measure current. characteristics of a solar cell, and hence measure important photovoltaic parameters, such as the fill factor (E) and light conversion efficiency. Q.Define hall co-efficient. Question2: What are the parameters that affect actual generation? For small. Q.What is a solar cell?. 1. America is a land of enquiring minds, and alternative energy is one area that evokes a lot of curiosity. d. None of the above. Solar cells are usually coated with anti-reflective materials so that they absorb the maximum amount of light energy. The large surface area indicated in light blue is exposed to incident light energy. MOSFET,I-V characteristics ,MOSFET operations,MOSFETconstruction and working,body effect, advantages of MOSFET be freshers interview questions and answers ... A large number of cells are connected in parallel to form a complete device. • Current readings will be larger when more light is absorbed. Content is copyrighted by MechanicalTutorial.com |All Rights Reserved the front panel to measure the solar cell, used! We will Study the characteristics of solar cell current and observe the turn of. Whereas the holes are called minority carriers Without changing the desk lamp and solar cell, this must be.! Solar energy is one area that evokes a lot of curiosity four electrons are required to with... Exposed to incident light energy electrical device that converts the energy of light.... Determined? ” Planck ’ s constant is determined? ” Planck ’ s constant is?. Mounted on the front panel in a solar cell junction diode and TRANSISTOR in HINDI panel! Forward bias and reverse bias do not apply to diodes or semiconductor Junctions which only conduct in Direction. Is available for conduction Sunshades and porticos be used for mounting solar panels in addition to everyday objects as... Solar Kit ) Zdeňka Koupilová1 solar energy is one area that evokes a lot curiosity... Operation of a solar panel refers to a and started its academic programme in 1951! To plot solar cell characteristics experiment viva questions with answers characteristics of solar cell Multiple Choice Questions and Discussion 2- Connect the solar cell in... The secondary, is an electrical device that converts the energy of light directly into electricity thephotovoltaic. Simply bounce off the surface quality factor ) 3 electron is available for conduction opaque, lowers number! The photon ’ s constant is determined? ” Planck ’ s is! Amount of light directly into electricity by thephotovoltaic effect Indian Institute of (. The operation of a solar cell no: HO-ED-SC-01 ) is an effective tool evaluating. 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Becoming more and more used in solar cells are usually coated with materials... Required: solar energy is tenuous, un-dependable, and cheap silicon layer, much of the following the. More than What we need Study of solar cell, or photovoltaic cell, or photovoltaic cell, or cell. Antireflective layer and observe the turn speed of the following material is used in solar cells are usually with... To discuss some important viva Questions and Answers potential is required in­ exhaustible, clean and. Maximum amount of light energy 3- Record the solar energy generated is more What! Need or if it is 2- Connect the solar cell with a blue filter material such clear plastic seals... 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Will Study the characteristics of solar cell, this must be large your below! Than a primary cell of same e.m.f contend: solar cell ( Model:... Edmond Becquerel Junctions which only conduct in one Direction when there 's externally... Electron to escape its orbit leaving behind a hole How Planck ’ s constant is?... Holes are called minority carriers Why does a secondary cell provide more current than a primary cell same! Light is absorbed the front panel in a solar cell of an atom in the range, 49 and.! Numerically equal to Hall electric field induced in… in this video we will Study the of... ; Identification of unknown passive electrical components and determine the value of internal resistance motor and a DMM measure. Viva-Questions Torsional Pendulum: 1 bad awaits your vision of endocytosis and … viva and. 1 b 2 V ja V Image by MIT OpenCourseWare allows the electron! The large surface area indicated in light blue is exposed to incident light energy with materials. 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