The properties of a p-n junction solar cell with EG = 1.42 eV are as given below. Practically none. 17,300 terawatts . Some solar panel cost variables include; The size of the system, which is often based on; Your household or business’ electricity needs and; What percentage of your electricity needs you want to be offset by solar energy. 0.5 W b. Solar cells are a form of photoelectric cell, defined as a device whose electrical characteristics – such as current, voltage, or resistance– vary when exposed to light. Solar Energy Multiple Choice Questions and Answers for competitive exams. … The area of the cell is: 2×10 −2 m 2. It sure can. Are they really the best thing to come along since sliced bread, or has all the talk been just hype and hot air? Which type of materials are used in solar cells? Silicon crystals are laminated into p-type and n-type layers, stacked on top of each other. How can you find the efficiency of a solar cell? At the end of a PPA contract, the customer will have the option of extending the contract, terminating the relationship with the installer, or actually buying the system and keeping it in place. In addition to these loan programs, all of which can be used to pay for solar photovoltaic or solar thermal systems in their entirety, there are numerous tax credits available at the federal, state, and local levels that can help offset the costs of any home improvement project that boosts energy efficiency and reduces dependence on the power grid. However, understanding what these variables are is the first step in answering this question. What It Takes To Create A Safe, Self-Sufficient, Off-The-Grid Lifestyle Using Solar Power! Each solar installation is unique and, as such, there is no one-size-fits all answer to this particular question. Any cost estimate must account for a number of variables and these variables will differ for every situation. ANSWER: a. Note, however, that the number of incident photons in space is considerably larger, so the solar cell might produce … Question #7:  Will permits be required if I decide to install a solar energy array? Question: Question 1 Solar Cells Were First Developed For The US Space Program In 1928. Are there ever! 5 Long-Lasting Superfoods To Keep You Healthy All Winter. Sharing is caring! These short objective type questions with answers are very important for Board exams as well as competitive exams. Under the terms of a PPA, the installer will put in a photovoltaic system at no cost and then charge its customer a fixed rate for the amount of electricity provided each month, similar to what happens with a regular utility company – except PPA rates are generally lower than those charged by a utility (there would really be no point to the arrangement otherwise). The inverter used in a PV system converts the DC energy of the sun into AC energy, which is the energy form that can power homes and businesses. 2. Question #6:  Assuming I can’t save enough money to cover all the costs of a solar energy system, are there financing programs and/or tax breaks available to help me out? Residential Solar InstallationCommercial Solar InstallationBattery BackupSolar Electrician, Monday 8:00 am - 5:00 pmTuesday 8:00 am - 5:00 pmWednesday 8:00 am - 5:00 pmThursday 8:00 am - 5:00 pmFriday 8:00 am - 5:00 pmSaturday Appointment onlySunday Appointment only. Question #3: Can solar energy be used to heat a home? 2. A comprehensive database of more than 22 solar energy quizzes online, test your knowledge with solar energy quiz questions. A solar panel is made from an arrangement of individual solar photovoltaic cells, which are almost always fashioned out of high-quality silicon that has been manufactured to function as a semiconductor. C.Solar Energy thermal energy Your Comments. Regardless of whether an array of solar panels are to be installed on the roof or on the ground, it is important that they be kept in the sunlight at all times. Fortunately the regulating bureaucracies are all quite receptive to solar energy, so obtaining full approval should be little more than a formality. Yes! Will Solar Panels Increase My Home Value? A solar panel is made from an arrangement of individual solar photovoltaic cells, which are almost always fashioned out of high-quality silicon that has been manufactured to function as a semiconductor. Because solar thermal relies on a much simpler technological arrangement than solar photovoltaics, it has attracted the attention of many do-it-yourselfers, and there are plenty of good designs available on the Internet for anyone who would like to put together their own solar hot water system from cheap or recycled materials. Remember, you will have to pay higher interest rates if you expect to get that array for below-market value at the end of your lease term, so taking out an energy-efficiency loan with a government agency and paying it back under friendlier terms seems like a better bet. The efficiency of the solar cell is 12.5%. Solar technology turns sunlight energy into electricity that can be used to power homes and businesses. The sun’s radiant energy provides the “juice” that makes this process hum along, and with the help of an inverter that transforms the initial electrical flow from DC to AC, a steady supply of power will be produced for direct usage or for storage in a battery bank (the latter is basically indispensible in a solar energy system that has no grid backup). The solar energy rebates and incentives you receive. Solar panels are made up of semiconducting materials (such a certain types of silicon). Tile roofs require more labor hours, thus a higher price. Question #2:  What are solar thermal hot water systems? Sunbridge Helps Electrify Rural Off-Grid Schools, Solar Within Reach: Incentive for Income-Qualified Households, We're Taking Extra Steps to Keep Our Employees & You Safe, Oregon Solar Rebates for Solar + Battery Backup, 2020 Guide to Energy Trust of Oregon Solar Incentives, 6 Questions to Help You Choose the Best Solar Panels, Washington Sales Tax Exemptions for Solar Energy, Portland's Solar Development Assistance Grant Explained, Leasing Land for Solar Farm in Oregon Explained. Can The Installation Be A DIY Process? As long as you are connected to the grid, your system does not need a battery: excess power goes back into the grid, and you can draw from the grid if you need more electricity than your panels can generate. Question #5:  How much space will a solar photovoltaic system require? How much solar energy reaches the Earth's surface at any given moment? D. Solar Energy mechanical energy View Answer. Question #10:  Bottom line: how much will a solar photovoltaic system cost me and how long will it take for it to pay for itself through energy cost savings? November 16, 2019 By Laurie Neverman 2 Comments This post may contain affiliate links which won’t change your price but will share some commission. Do NOT follow this link or you will be banned from the site. But if you have not yet freed yourself from the iron grip of the utility companies, like any good American you probably have quite a few questions about alternative energy, and you are no doubt especially curious about just how good of an option solar energy really is since that is the technology that is getting most of the attention these days. And after having done so, we will then attempt to provide some good answers to those vital questions so you will have a much better idea of what a commitment to a solar energy system would really entail. A typical photovoltaic array has 36 cells. Question #1: How do solar photovoltaic panels work, and are they really as efficient as everyone says? If you are an off-the-gridder, leasing is not the way to go, because unless you choose to buy your solar energy system at the end of the lease term, it will never actually belong to you. Solar Oregon estimates that the cost of a 4.2 kW system would be $13,000 – $15,000. 250+ Solar Photovoltaic Interview Questions and Answers, Question1: Capacity of the power plant? This credit reduces your federal tax liability and valued ay 30% of final cost of installing a brand new solar system. The electrons in these semiconducting materials, when exposed to sunlight, become “excited” and are released from their atoms. (BIPVs only have about a 1 percent market share as of now, and until greater economies of scale are attained, costs are not likely to come down significantly. If only one bottom row of a solar panel is in the shade it can reduce the efficiency of that panel by up to 80 percent, so any space chosen will need to be obstacle- and tree-free around its perimeter. Related Resources See … Solar cell question. Individual solar cells can be combined to form modules common… In this page you can learn various important solar cell multiple choice questions answers, solar cell mcq , short questions and answers on solar cell, sloved solar cell objective questions answers etc. This is where we put all the questions we get from our customers and our answers. In this article, we will play the part of the Carnac the Magnificent (another good Google topic for those of you who are too young to remember Johnny Carson) and attempt to ascertain the content of the ten most important questions you have about solar energy before you actually ask them. alternative energy Energy fossil fuels off the grid photovoltaic cells solar solar cells solar photovoltaic panels solar thermal. 1. Rather than processing and converting solar energy the way photovoltaic systems do, solar thermal set-ups simply collect the sun’s heat as it arrives and use it to heat a supply of water. I've been asked solar questions by so many people over the past six years since the first edition of my book was published. Solar electric modules are typically one to two inches (2.5 to 5 cm) thick with 32 or more three to four inch (7.5 to 10 cm) blue or black solar cells on the back of the cover glass. (If you are too young to understand that reference, please Google it.) How Long Does The Installation Process Take? Considering solar? Take these 35 trivia Solar System Quiz Questions and Answers to test your knowledge on it. Q.2) What is solar cell principle? Solar energy is the most abundant energy source on the planet. Photovoltaic Solar Cells. Put your brainpower to the test with our solar energy quiz! Question #9:  I’ve been hearing a lot about solar leasing – could this be an option for me? So people wonder – what is the deal with solar and wind and other such miracle energy technologies? This is a statistic that figures to improve dramatically in the coming years, however, as research and development efforts in the field have been heating up faster than an erupting volcano. You will also have to make sure everything you put in meets all building and electrical codes and that your system adheres to the standards for solar electric building set forth in Article 690 of the National Electric Code (NEC). A solar system is made up of connected solar panels that absorb rays from the sun and convert it to electricity. Fuel cells c. Edison cells d. Cryogenic storage View Answer / Hide Answer. Purchase options will be available at the end of the lease term, either at market value or below market value depending on how much interest was paid by the customer over the term of the contract (lease terms for a solar energy system are very similar to payback terms for a bank loan). Optimum angle in Portland is 32 degrees. And if you are preparing for the impending collapse of the grid, how can you be sure that it won’t happen before you actually have the chance to take over ownership of your photovoltaic array? There are two types of third-party financing alternatives available for interested parties, power purchase agreements and conventional solar leases. These free-floating electrons are then captured by a direct electric current. The added elements of boron and phosphorus create electrical conductivity, making it possible for electrons to move across the surface of a photovoltaic cell … Oxygen b. Ammonia c. Hydrogen d. Carbon monoxide View Answer / Hide Answer. Luckily, batteries are not necessary for most solar homeowners. Solar cell . Find out if solar makes sense for you. If one is shaded, power production drops by: Yes, a building permit will be needed if you plan to install either a solar photovoltaic or solar thermal system. 3. There's too much resistance inside the semiconductor. How much energy your solar power system will generate every year. C. Solar Energy thermal energy. You consent to our cookies if you continue to use our website. Terrestrial efficiencies typically are greater than space efficiencies. Beaverton Solar CompanyHillsboro Solar CompanyPortland Solar CompanySalem Solar CompanyVancouver Solar CompanyWashougal Solar Company, 421 C Street, Unit 5AWashougal, WA 98671 United States (Directions), ©2021 Sunbridge Solar, LLC. But if you are an off-the-gridder, the freedom and energy independence you attain when you go solar is priceless, and that is something you shouldn’t forget about when you are deciding whether or not you can really afford a solar photovoltaic energy system. B. ANSWER: b. Radiant heating systems are a variation on the solar thermal set-ups just described: solar collector pipes are used to heat a renewable supply of water, which is then pumped through a network of plastic tubes running below the floor of a home, facilitating the transfer of heat into the rooms above. All Rights Reserved. This problem has been solved! It is also of interest to identify and characterize mechanisms and observations applicable to cells made from different materials. Solar radiant heating systems of this sort are probably not great choices for climates where temperatures stay well below freezing for the majority of the time during the winter (except as a supplement perhaps), but a well-designed system can function up to 40 percent more efficiently than the typical forced air set-up, making it a good “bang for the buck” investment for those residing in milder climates. 173 terawatts. 3. A solar cell is basically a p-n junction diode. ANSWER: c. Hydrogen . How Durable Are The Solar Panels? Question4: Can Sunshades and porticos be used for mounting solar panels in addition to roof tops? There are also closed-loop indirect thermal systems that pass the heat collected to a fluid with a low freezing point such as glycol, which in turn transfers that heat via exchange coils to water that is already stored inside tanks. 1. which will improve your skill. Solar power systems that include solar batteries, known as solar-plus-storage, are increasingly popular, but can be pricey. Take eo=1.6×10-19JV, k=1.381×10-23JK Question 4: A solar cell (photovoltaic cell) has an open circuit voltage value of 0.5 V with a reverse saturation current density of J0=1.9×10-9Am2. both A and B. Advertisement. Type II – Calculate Area. A solar panel works by allowing particles of light, or photons, to knock electrons free from atoms, generating a flow of electricity. A solar cell can only absorb 15 to 25 percent of the sun's energy because: Not all wavelengths of light create the right reaction in the cell. We compiled these Top 5 Solar frequently asked questions by studying the different FAQ lists of 15 different solar energy resources and analyzing which 5 questions were asked most frequently. 5. How Does The Solar Panel System Work? Didn’t find the answer you were looking for? The efficiency of the solar cell is 15.62%. In general, the multi-junction cells are most efficient, reported as 23% compared to 15% for single junction and 10% for thin film. In fact, one of the most fun aspects of having written my book has been meeting and talking to the countless enthusiasts who have bought the book and have implemented their own solar energy systems. If any debris should fall on them following strong winds or a storm, it should naturally be removed, but because these systems are made of durable materials and don’t have moving parts, they can usually continue operating for 30 or 40 years with very little trouble. a. The time it takes to pay back the cost of installing a brand new solar system is a difficult question to answer without a site-specific analysis because many factors will influence the final result. Think what you want about the government, but they are extremely bullish on alternative energy, and if you want to install a solar energy system on your property, there are all kinds of credit and finance programs available to help you out. Do You Make These 7 Home Energy Mistakes? Location of your roof. Why is the solar cell produced by DC 5 answer How to generate solar cells, the principle of PN junction 3 answer The difference between a fuel cell and a solar cell 5 answer How to get high voltage, high current output of solar cells 3 answer What are the short-circuit currents of solar cells affected by the factors? Questions to Ask the Solar Installer. 4. Q4. Written by: NathanF Grid Threats 10 Comments.WP-PrintIcon{margin-bottom:-3px} Print This Article. 1.73 terawatts. For example, nano-solar technologies that assemble solar photovoltaic cells molecule by molecule are coming that will make solar energy far more economical and efficient than it is now; but while those current 13 to 20 percent numbers might not sound all that impressive, it must be remembered that the sun provides its energy entirely for free, unlike coal which must be mined, processed, transported, and incinerated before it can do any useful work. Q5. Because so many people were interested in solar energy but unable to afford it, a few years ago a solar power company called SolarCity came up with a brilliant idea: why not offer home owners the option of leasing a solar photovoltaic system, so they can reap the benefits of the technology without being forced to pay for the whole thing right up front. Solar Plant | Solar Plant Objective Questions and answers. The amount of solar incentives available depends where the solar electric system will be installed. However, understanding what these variables are is the first step in answering this question. Note: Photovoltaics (PV) is one of three main technologies used to garner energy from the sun. Solar cell b. Q.1) How does solar cell work? Multiplying the spectral differences by the quantum efficiency of the solar cell in question yields the efficiency. The flow can be kept going for as long as is required, and such a system is capable of heating a fairly significant amount of water in a short period of time. What is a solar cell? Questions; Answers; Additional Links; References; Contributors and Attributions; Solar cells are one of the biggest sustainable methods of energy and have the ability to convert radiated light into electricity. ‘Off The Grid News’ is an independent, weekly email newsletter and website that is crammed full of practical information on living and surviving off the grid. Assume that a solar cell with a cell area of 10 cm2 can be modeled by a single diode model with following parameters: J0=10-10 A/cm2, n=1.15, JPH=25 mA/cm2 under AM1.5 illumination with 100 mW/cm2 power density. An Outdoor Oven Perfect For Off-The-Grid Living, Surviving Off The Grid Without Air Conditioning. 4. Silicon Solar Cells; Materials. In a fuel cell cathode is of a. All Solar Cells Question. So solar photovoltaic technology is already pretty darn efficient all things considered, and the situation is only going to get better in the future. MCQ quiz on Solar system and Planets multiple choice questions and answers on Solar system and Planets MCQ questions quiz on Solar system and Planets objectives questions with answer test pdf for interview preparations, freshers jobs and competitive exams. Question3: What happens when the solar energy generated is more than what we need or if it is less than what we need? But how much do you really know about the technology needed to capture the tremendous power of the sun? Your energy savings when you go solar will be substantial, especially if you use it to cover 100 percent of your electricity needs. Share; Tweet; Pin; Reddit; Yummly; To help our readers get more familiar with solar, we're putting together a series of articles answering common solar energy questions. The angle of your roof. Solar energy is the quintessential low-maintenance technology; outside of the occasional cleaning with soap and water, neither solar photovoltaic panels nor solar thermal collector coils will require much attention at all. Windows, roof shingles, and glass walls can all be constructed with power-generating solar cells fully integrated with the supporting structural materials, cutting out the middleman and bringing solar energy generation to a whole new level of streamlined efficiency. True False Question 4 3 Of 10 Completed Save For Later Subm . Are Solar Panels Worth It In Washington State? Solar cells are made from a wide variety of materials, and traditionally, less-than-ideal performance was attributed to very specific imperfections and defects found in the materials used to build the cells. Your rate of return will be dependent financial and environmental variables. For most up-to-date pricing, we recommend contact us. Solar Energy into Electricity. Our online solar energy trivia quizzes can be adapted to suit your requirements for taking some of the top solar energy quizzes. 1.0 W . At the local levels, the amount available varies state by state. Admit that the front face of this solar cell has an anti-reflective coating that completely prevents reflection and that its parasitic effects are neglected. If you are new to this type of energy or don’t have much knowledge about it, this should be the first question. Energy-efficiency mortgage loans can be taken out that will fund alternative energy installation costs, and there are 8 different federal government agencies that offer such loans to members of the general public: Fannie Mae, Freddie Mac, the Department of Energy, the Environmental Protection Agency, the Department of Agriculture, the Department of Housing and Urban Development, the Small Business Administration, and the Department of Veterans Affairs. It is shaded by trees? This means that solar panels themselves produce DC electricity. A single solar cell on illumination by insolation of about 800 Wm −2 produces a voltage of 0.5 V and a current up to 2.0 A. 1. 1. Some solar panel cost variables include; The size of the system, which is often based on; Your household or business’ electricity needs and; What percentage of your electricity needs you want to be offset by solar energy. But homes and businesses can’t use DC energy directly; it must first be converted into AC (alternating current) energy. Solar water heating panels are generally much thicker and may have tubes connected to a flat black plate under the glass, or a black tank inside the collector panel. Tile roofs require more labor hours, thus a higher price. America is a land of enquiring minds, and alternative energy is one area that evokes a lot of curiosity. Own your electricity and turn your utility bill into an investment with one of our $0-down, solar specific loans. This mathematical rule of thumb means that a solar photovoltaic system with a generating capacity of 1 kilowatt (1000 watts) would need 100 square feet of roof or ground space to hold its constituent panels. 2. Panasonic HIT Solar Panel Review for 2020, Off Grid Solar System: How to Go Off Grid with Solar, Tesla Powerwall vs. Generac PWRCell 2020 Review. This current is known as DC (direct current) energy. 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