What is Electromagnetic Induction

What is Electromagnetic Induction All You Need to Know about Electromagnetic Induction. ChaptersWhat is Electromagnetism?A Brief History of Electromagnetic Induction.How Does Electromagnetic Induction Work?How Do We Use Electromagnetic Induction?The science of electromagnetism is one of the most important fields we know of. For practical applications in industry and for our knowledge of the physical structure of the universe, electromagnetism is central.Maybe you’d never have realised but, without electromagnetism, we wouldn’t be able to transport or generate electricity. It just wouldn’t happen. We wouldn’t be able to get the massive quantities of electricity we need across the country and into each of our homes. Think about that when you’re turning on the lights, boiling the kettle, or watching the tv.Meanwhile, by the way, electromagnetism â€" that curious overlap of electricity and magnetism â€" forms the bonds of the universe. This is why we can’t really say that anyone ‘invented’ electromagnetism: it was rather discovered â€" and then calculated to be the force that holds together the different parts of the atom. It is responsible for chemical compounds â€" and it is also the force that produces light.Electromagnetism, then, is everywhere. But, here, we are going to look at a particular phenomenon known as electromagnetic induction â€" the production of electromotive force through the presence of a changing magnetic field.Don’t worry if that is not clear â€" because we’ll do a recap of all of the science that you need to know to understand this really quite amazing process.Check here for a physics and maths tutor s1. PetarPhysics Teacher 5.00 (11) £40/h1st lesson free!Discover all our tutors MyriamPhysics Teacher 5.00 (13) £20/h1st lesson free!Discover all our tutors Dr parikhPhysics Teacher 5.00 (8) £40/h1st lesson free!Discover all our tutors RubenPhysics Teacher 5.00 (1) £15/h1st lesson free!Discover all our tutors FrankPhysics Teacher 5.00 (8) £90/h1st lesson free!Discover all our tutors JidePhysics Teacher 4.80 (5) £30/h1st lesson free!Discover all our tutors DorothyPhysics Teacher 5.00 (5) £40/h1st lesson free!Discover all our tutors RahulPhysics Teacher £20/h1st lesson free!Discover all our tutorsWhat is Electromagnetism?Let’s start with electromagnetism. What was this again?Let’s Start with MagnetismWell, we know what magnetism is, right? Some materials are magnetic â€" meaning they exert a magnetic force â€" whilst others are not. In those magnetic materials â€" and we call those that remain magnetic even beyond an external magnetic field permanent magnets or ferromagnetic materials â€" the unpaired electrons are all aligned, meaning that they exert a force in a particular direction.In nonmagnetic materials, this doesn’t happen â€" with the electrons either being all paired or else completely random.These ferromagnetic materials â€" like iron or nickel â€" are either magnetic at random or because they have been in contact with a magnetic field. And whilst these things a re cool in themselves, they are not of handy as electromagnets â€" which can be switched on and off and which are much much more powerful.And powerful magnets can do an awful lot.And Electromagnetism?An electromagnet, meanwhile, is a magnet powered by an electric current.Electricity itself has a magnetic force. And whilst this is present even in just a simple copper wire â€" and, as we said, in all of the miniscule measurements of electric charge across every atom and chemical bond â€" scientists have found ways of making that force much stronger.Generally, electromagnets use coils of wire, with each coil winding around a piece of metal â€" usually iron. This particular thing is called a solenoid. When there is an electric current flowing through this wire, the magnetic field produced is centred on the magnetic core, the piece of metal at the centre of solenoid. These electromagnets are super strong â€" and, as soon as you turn off the electricity, the solenoid stops being magnetize d.So, yes, really an electromagnet is really just a really strong magnet. However, this particular combination of electricity and magnetism is incredibly useful. And one of its most important applications is in electromagnetic induction â€" the productive of electromotive force (emf or induced voltage) through the movement of a magnetic field.These magnets, then, produce electricity. Do you see why they might be useful now?Check out our guide to magnetism and electromagnetism! A diagram of a magnetic fieldA Brief History of Electromagnetic Induction.To best explain the process and importance of electromagnetic induction, let’s trace its history briefly. Let’s go back to the very first experiments that brought it to light â€" way back then in the 1830s.At this point, we already had the horseshoe electromagnet, thanks to the invention of William Sturgeon â€" and we already knew that electric currents wielded a magnetic force of their own, due to the findings of Ampere and Oersted.However, it was a man called Michael Faraday that discovered the principles of electromagnetic induction, when he conducted a little experiment published in 1831.Michael Faraday.Michael Faraday has actually become one of the most influential scientists in history â€" with his work on magnetism showing how this force can affect rays of light, for example. However, his most influential experiment was that which discovered electromagnetic induction.Faraday took an iron ring and, wi th two different pieces of wire, wrapped coils around opposite sides of it. When running an electrical current through one of the pieces of wire, he expected to see some sort of electrical charge or effect on the second piece of wire.He therefore connected this second piece of wire into a galvanometer, a machine that measures electrical charges. And, lo and behold, when he turned the battery on and off on the first wire, the galvanometer showed an electrical charge. This, Faraday suggested, was due to the magnetic flux that passed through the centre of the ring.To clarify this, there was only an electric current produced when the magnetic field changed. So, only at the moments when he turned the battery on and when he turned the battery off did he see a change on the galvanometer. At other times, the galvanometer showed nothing.This is why another of his experiments had him slip a bar magnet in and out of a coil of wire. Here, the same electrical charge was seen on the galvanometer with the movement.Faraday’s Law and Maxwell’s Equations.Whilst Faraday did the practical work, his results weren’t met with much enthusiasm â€" as he didn’t present his findings in mathematical terms.It was James Clerk Maxwell who, thirty years later, described what Faraday had shown mathematically. Maxwell’s equations have become the name of these laws which describe what happens in electromagnetic induction.How Does Electromagnetic Induction Work?So, what exactly is this thing that Faraday discovered? Simply put, the importance of this discovery was that changes in magnetic fields can induce electrical currents.As we know, electrical currents have a magnetic field. This is what solenoids are all about. But, as Faraday did, if you interact with that magnetic field with another magnet, the potential or voltage of the electric current is changed.If you were to move such a magnet in and out of a coil, you’d feel a fair bit of resistance. But with this resistance is produce d the current flow. Speed up the movement of the magnet and the induced current will increase; strengthen the magnetic field and the same happens.In this way, then, magnets can be used to turn kinetic energy into electric energy â€" as by moving the magnet, the current flows. This is precisely how things like generators work: they generate electricity through the movement of a magnet in a magnetic field.Maybe you can see now why this was such an incredibly important discovery. Electromagnets produce a strong magnetic field.How Do We Use Electromagnetic Induction?To clarify this phenomenon further, let’s take a look at one of the major technologies that applies it. That’s the electric generator, a tool that is really incredibly common. From power stations â€" in which fuels are burned, say, to power the magnetic field â€" to cars and teeny-tiny motors in all sorts of different equipment, these things are everywhere.Electrical Generators.Electrical generators work by producing a magnetic field in which other magnetised coils are moved.Cars, for example, use an alternating current generator â€" or alternator â€" to ensure that the battery remains charged. With alternating current, the induced current moves in alternating directions â€" hence the name.Imagine a magnetic field in an enclosed space. At the centre of this space is a rotating coil of wire with a current passing through it. As you can imagine, there will be interaction and resistance between th e coil of wire (with its own magnetic field) and the general magnetic field in the generator.As one side of the rotating coil moves upwards, a positive current is induced. As it moves back downwards, its opposite occurs. Consequently, you get a current which is constantly changing.In a DC generator (direct current), there is a mechanism that means that the movements in the magnetic field are reversed â€" so there is no alternation.Why Use AC?AC is much more common in massive electrical contraptions. That’s because it is much easier to transport than DC: you can up the voltage whilst having a small current.But, given this high voltage, you need transformers for this current to be usable. And you can learn all about transformers in our article here. AC/DC? Not quite what we're talking about here, no.

5 Introvert Leadership Myths - Introvert Whisperer

Introvert Whisperer / 5 Introvert Leadership Myths - Introvert Whisperer 5 Introvert Leadership Myths Personal Branding starts with how well you speak about YOU.  I want to help you accelerate your career by connecting you with your Free Instant Access to my eBook â€" The Definitive Guide to Creating and Using an Elevator Speech.  In this guide, I give you simple to follow instructions for creating a “wardrobe” of ways to talk about you â€" to leave a lasting impression. Get your copy now! Brought to you by Dorothy Tannahill-Moran â€" dedicated to unleashing your professional potential. Introvert Whisperer

Math Level 1 or Math Level 2 Online Tutoring Tutorpace

Math Level 1 or Math Level 2 Online Tutoring Tutorpace Online Tutoring for SAT Mathematics 1 and 2 The SAT Mathematics subject test is broken up into two sections and is a useful tool for students trying to get into competitive engineering, economics, and science programs. In order to in score high enough to get into your first choice, working with an online Math tutor may give you an advantage over students who have decided to study on their own. Tutor Paces tutors have been helping students prepare for the SAT Mathematics section for years, and their expertise can give you the confidence you need to earn the score you desire. Comprehensive SAT Mathematics 1 and 2 Tutoring Because these tests cover several years of advanced high school subjects, it is important to make sure you are fully prepared for each subject in the test. Our tutors will cover everything you need to know, including: Numbers and operations Algebra and functions Geometry and measurement Data analysis, statistics, and probability Trigonometry Elementary Pre-calculus functions Advanced Online Learning Tools Tutor Paces online SAT Mathematics 1 and 2 tutoring program makes use of the latest innovations in online learning to provide you with an unparalleled educational experience. Our online classroom allows you to interact with your tutor through an intuitive whiteboard that makes it easy to create complex formulas. Tutor Pace is on the cutting edge of online tutoring, and our programs offer the best value available. Unlike other tutoring services that limit your time, we have many unlimited tutoring programs that will ensure you are ready on test day.

GMAT Review Series Sentence Correction - Parallelism

GMAT Review Series Sentence Correction - Parallelism GMAT MBA Admissions Blog In today’s GMAT Review Series video, we’ll take a look at a Sentence Correction (Parallelism/Verb Tense) question from GMAT’s Official Guide 2019 â€" Verbal Diagnostic Exam. Key pointers from this video: Begin by setting up your scratch pad to help you ID the Error CategoryWrite the question number with a line beside it to write any errors you identify in the sentence or the answer choices. List answer choices below to facilitate the process of elimination as you work. Ignore Punctuation as a Standalone IssueThe GMAT does not test punctuation, so never worry about punctuation as a standalone issue. Punctuation can be subjective and all errors on the GMAT have to be absolute. Look to Main Subject Verbs for Errors Look at the subject and verbs for the clearest understanding of any potential errors. Find the subject and any verbs in the underlined portion of the sentence. In this case “dolphins” are the subject and “recognizing” and “to grasp” are the verbs, these are not parallel verb tenses, so we have identified the error category (parallelism/verb tense). Always default to the original sentence as it was written when considering different meanings. As you move through the answer choices, read the sentence literally to see if it makes sense. This video was produced by MyGuru'sDirector of Online Instructionand expertonline GMATtutor Stefan Maisnier. Visit ourYouTube channelfor more GMAT analogy videos.

Thoughts on Online MBA Programs

Thoughts on Online MBA Programs Improving Academic Performance Every once in a while, students who work with us on GMAT prep will ask for advice about business school options (especially if they don’t do well on the GMAT). From time to time, the topic of online MBA school options will come up. MyGuru’s founders attended the Kellogg School of Management at Northwestern University, which is a top 10 MBA school. However, we still wonder whether the extremely large investment in an MBA will ultimately be worth it. For that reason, we encourage potential online MBA school students to be extremely careful before investing large sums of money in going to an MBA school online. Our recommended options for online MBAs are those that come from well-respected schools that also offer traditional in-person programs. One such example would be Indiana University’s online MBA program. The problem with MBA degrees is that there are just so many programs. Regardless of the program you enter, you’ll have the opportunity to learn a lot about business and improve your management skills. However, from an “employee screening” perspective, most employers know that it really isn’t that difficult to get an MBA, so they look for students with degrees from top notch schools. However, for some students currently working in jobs or careers that place a high value on an MBA, regardless of the school, an online MBA can make a lot of sense. They allow you to continue working, so you don’t have to take a huge hit in the form of two years of lost salary. Plus, the online option obviously works around your schedule. So, as long as you weigh the cost/benefits carefully, and study how much the degree will cost you (both in terms of upfront cost and the opportunity cost of lost wages while you’re in school) vs. what jobs you expect to land after you have the degree, an online MBA could be a good option for you. However, just don’t fool yourself into thinking that having “MBA” next to your name will necessarily earn you a better job or higher salary.

Quiz Where should you apply to teach abroad in 2016 (With job postings)

Quiz Where should you apply to teach abroad in 2016 (With job postings) Happy New Year! After a busy year at Teach Away we are happy to welcome 2016 with open arms. It’s time for us to help even more educators get overseas! And it’s time for you to find the best education job abroad for you; we have piles of job postings coming up this year in countries all over the world.Whether or not you have a resolution for the new year, growing your education career, learning about the world through new perspectives, accomplishing old goals and setting new ones are all things made possible in 2016 by pursuing your itch to travel and teach overseas.The only thing left to take care of is deciding where on Earth you want to go! Pinpointing a place to teach abroad is a task in itself. Do you want to escape the cold next winter for a more tropical destination? Maybe you want to take in the modern of architecture of the UAE or the ancient cultures of China.Or maybe you should just take this quiz to help you get an idea of where to go:  Where Should You Go Teach  Abro ad?  Current job postingsTeach Away jobs in ChinaTeach Away jobs in the UAETeach Away jobs in MexicoTeach Away jobs in JapanTeach Away jobs in South Korea

4 Career Paths to Find While Working at a Summer Camp

4 Career Paths to Find While Working at a Summer Camp Image via Pixabay.com Movies might make it seem as though camp counselors are only supposed to escort the kids from one activity to the next and make sure they don’t get hurt, but there is much more to the job than that. You’ll be tasked with giving your campers a constant balance of education and fun. In some cases, this means working with other counselors to create lesson plans full of activities that will appeal to multiple ages. As a camp counselor, you will be able to practice presenting education to children in an energetic manner that will make them want to learn. Your sense of creativity and patience will be tested as you come to realize there are several different learning styles that your lessons should cater to. Some students will learn through hands-on approaches, and others will grasp concepts just by listening. If you find that you can recognize these learning styles in your campers and educate them with ease, then a career in teaching might be right for you. Food service The kitchen of a summer camp is home to some unique and delicious recipes, from roasted tomato soup to s’mores campfire cones. Working as a line cook at a summer camp will put your culinary skills to the test, and you might discover a hidden love for the food service industry. Image via Pixabay.com Cooking at a summer camp will expose you to a sort-of restaurant environment you’ll be serving a large mass of people, each with different accommodations that need to be met. You’ll have to keep food allergies in mind if you offer recipe ideas. Step away from what you think you would enjoy eating, and consider what the majority would enjoy. This is where your creativity will come in handy. A summer camp is the perfect place to experiment with those fun kids’ recipes you find on Pinterest, or any ideas you have of your own! Just as a manager in a restaurant must do, you’ll have to ensure that the campers have everything they need for their meal  and that you have enough for everyone. You should be able to calmly take care of any problems that a camper might find with their food. Working in a camp kitchen will teach you plenty of management skills that you’ll be able to carry into a future food service career. Environmentalism If you’re one with nature, you could take on a job as a trip leader at an outdoor camp. A trip leader, as you might guess, “leads groups on expeditions, trips, and outdoor experiences, usually for extended periods,” according to the American Camp Association. You’ll get to teach campers about nature as you experience it in real time, and the job might peak your interest in an environmental science career. Being a trip leader will give you a chance to share your love of nature with other people. Plus, if you would like to know more about the environment, what better way than to live in it for a few weeks? Plan a boating trip on the river for your campers, and observe some of the fish along the way. Schedule a hike through the woods to check out all the different plants. You’ll be surprised at what you can learn from looking at how nature lives. Image via Pixabay.com We live in a world where the environment is often taken for granted. Adventuring through the great outdoors might inspire you to do better. As a trip leader, you might see yourself pursuing studies in environmental sciences like botany, biology, ecology, or zoology. Hospitality management A job as an activities planner for a summer camp is perfect for anyone with organization skills. If you’re the friend that draws up an itinerary for every trip, this job would be a dream come true for you, and you might decide you want to study hospitality management. As an activities planner, you’ll be in charge of how the campers spend their day everything from waterskiing to making jewelry. You’ll have to ensure that the activities run smoothly, and make sure that the counselors are aware of the plans. Your time management skills will improve greatly from trying to fit so many activities into a day, and it can teach you to be quick on your feet when it comes to solving scheduling issues. Studying hospitality management can lead to you becoming a hotel manager, restaurant manager, wedding planner, and more. You could even come back to your summer camp as a camp director. Image via Pixabay.com This list definitely doesn’t cover the number of career paths you could find while working at a camp. People travel from all over the world to visit some camps, so you never know what connections you’ll make. If you’d like to work for a summer camp, try to choose one that best suits your interests. Here are seven types of summer camps to work for.