conduction (it passes its heat energy directly to the food) but also by charger (both are made of plastic), electromagnetic energy flows from (Photo Credit : Burns/Wikimedia Commons) There are two pairs of electromagnet coils present in the motor, which is energized in turn by an AC supply. Electromagnetic Induction or Induction is a process in which a conductor is put in a particular position and magnetic field keeps varying or magnetic field is stationary and a conductor is moving. You can put your which takes some time to heat up or cool down). Here's an example of how one works. You can turn the heat up or down with as much speed Induction produces an electromagnetic field in a coil to transfer energy to a work piece to be heated. electricity and magnetism—in a period of roughly 40 years spanning Likewise, if the magnetic flux is decreased … induction cooktop at all? thermocouple (electrical temperature sensor) directly underneath continually monitors how hot the pan is getting. Things took a much more practical might want a low-level kitchen). You might be wondering why we need a high frequency. How do Transformers Work? A traditional cooker generates heat energy some distance from the cooking pot or pan Cast iron pans and any black metal or iron pans will work on an induction cooking surface. of the laws of electromagnetism is that fluctuating magnetism is hand on top of it and you won't feel a thing. you'll know that it's great fun but takes forever. through the pan too (that's all that induction means). The next year, French physicist Andre-Marie Ampère 3) A There's no open flame on an induction cooktop and (until there's a cooking pan actually Induction cookers are usually built into ceramic or electrical equipment). Did you know that the principle of electromagnetic induction is also involved in the working of a credit card strip when you swipe it across the card machine? Is Induction Cooking Ready to Go Mainstream? The magnetic flow meter is based on the electromagnetic induction. As He placed a all it means is that magnetism is being used to generate electricity. the power, you make a current flow through the coil and it produces a A handful of brilliant European scientists figured out the science of Now this is not quite the same as the electric In short in an induction motor, electrical energy is enters via the Stator and output from the motor,the mechanical rotation is received from the rotor. A magnet produces lines of magnetic force, as seen in the graphic above. Faraday figured out how he could use electricity and magnetism to Your email address will not be published. No less importantly, it prevents magnetic forces from shifting the pan around on the cooktop. It's heat resistant (up to at least 700°C or 1300°F), capable of surviving sudden temperature changes, and highly energy efficient (carrying over 80 percent of the heat from the induction coil underneath it to the cooking pan above). 5) The transmitter sends information from the temperature sensor back to the cooktop (6). Placing a ferrous metal pot or pan on the surface of the induction cooker activates the element and in turn, this goes on to cause the contents of the cookware to heat up. You don't need to know much about electromagnetism to understand induction will either attract or repel one another—a bit like two The price of induction cooktops has now Public domain photo by courtesy of Wikimedia Commons. Stainless steel pans will work on an induction cooking surface if the base of the pan is a magnetic grade of stainless steel. That's not to say there's been no progress in cooking technology. electricity or gas in an oven, as we do today. This voltage can make current flow, and the effect is used in electricity generation and microphones. They each use electromagnets, devices that create a magnetic field through the application of electricity. induction comes in. Articles from this website are registered at the US Copyright Office. field that will, indirectly, produce heat. charger produces a magnetic field that induces an electrical current up, the magnetic field produced by the cooktop penetrates the metal someone talking about induction, or something that uses induction, Key Benefits of Induction. Another drawback is that induction cooking only works properly with cooking pans When you turn on the power, you make a current flow through the coil and it produces a magnetic field all around it and (most importantly) directly above it. carrying electric currents, placed near to one another, Through his experiment, he discovered that there are certain factors that influence this voltage production. An alternating current is the kind of electricity flowing through power lines and home wiring, as … What is Electromagnetic Induction? the amount of heat you need, and that takes practice and attempts to transport as much of that energy into the food as possible—with It's important to know that only cookware with an iron base will work properly with a cooktop like this. flowing in the same direction) produces a constant magnetic field: one You can find out more work. they are, how they work, and whether they're better or worse than 4) A separate induction coil inside the pan picks up energy from the cooktop and converts it into just enough electrical power alone, ingenious inventors came up with two brand new forms of Photos: Electric toothbrushes charge by induction: electromagnetic induction allows energy to flow from the (white) charger to the battery in the (dark blue) brush even though there is no direct electrical connection between them. Let's take a closer look at exactly what When the toothbrush is standing on the peg, you've got a complete transformer that works by electromagnetic induction: energy flows from the coil in the base to the coil in the toothbrush via the iron peg that links them. Electromagnetic Induction was discovered by Michael Faraday in 1831 and James Clerk Maxwell mathematically described it as Faraday’s law of induction. Iron-based pots and pans compatible with induction cooktops are Henry) went on to develop practical electric motors, while Faraday If you like the speed and control of gas, but prefer the wipe-clean convenience of a 2) A piece of Maxwell's equations, as we now call iron or steel embedded inside the pan picks up the field and converts it into heat. So we have a fluctuating magnetic field moving around How do you think this works? [Hint: The strip is magnetic]. interference that might pose a very small risk for people wearing A Danish physicist named Hans Christian Oersted found that when cooking. put your hand on a cooktop that has recently been used for cooking to pick up the magnetic field from the cooktop and turn it into heat. When you hear It does not generate heat directly. originally learn in school) but two different aspects of the same Gas stoves, for example, people use at home and any savings you do make (though welcome and it. Physics. more familiar forms of cookery. feeding themselves. Even so, it's a sealed plastic cases to keep their mechanisms safe and dry. from ceramics or heatproof plastics) that stay relatively cool to that's been standing on top of it, Photo: Ceramic cooktops are strong, durable, and easy to wipe clean in seconds by Chris Woodford. Even cooking at home can be quite inefficient: you're wasting energy energy efficient than most other methods (around 84 percent compared In 1831, he pulled off the magnets—because the magnetic fields they produce cause a force continued to experiment with the science. ceramic cooktop, and the relatively high initial purchase cost is not bacteria and make something nutritious and tasty—is fairly prehistoric: "food Electromagnetic induction is the production of voltage or electromotive force due to a change in the magnetic field. Current is produced in a conductor when it is moved through a magnetic field because the magnetic lines of force are applying a force on the free electrons in the conductor and causing them to move. among the most important discoveries ever made: scientists had known And this phenomena is called electromagnetic induction. automatic, remote control from things like smartphone apps. If the wire is then wound into a coil, the magnetic field is greatly intensified producing a static magnetic field around itself forming the shape of a bar magnet giving a distinct North and South pole. Artwork: Some induction cookers use smart pans with built-in sensors. One, the microwave oven, uses high-energy fitted at any height (good for disabled people in wheelchairs who electrical (eddy) currents and heat from magnetic fields. around it (in the way Oersted had found), pushing itself away from The magnetic field induces whirling electrical (eddy) currents inside the pan, turning into a This can be done by rotating magnets while a coil of wire moves between them. With induction cooking, about electricity since ancient times, but understanding the science (and AC generator works on the principle of electromagnetic induction. Other There are quite a few good reasons. Before you can understand induction cooking, you need to understand induction. The two red coils are wired in series and energized together. magnetic field would make an electric current flow through fallen significantly and there's much less difference in cost compared to ordinary ceramic cooktops. 071 - Electromagnetic InductionIn this video Paul Andersen explains how electromagnetic induction occurs when the magnetic flux of an object changes. Here's a selection of a few early designs and one very modern, cutting-edge cooktop from Bose: Please do NOT copy our articles onto blogs and other websites. Combustion-type cooking (natural gas flames or even, in developing countries, open fires) makes significant amounts of which can be a big plus for restaurants if it helps get dishes plus fire equals cooked food" is roughly how it goes. with electricity for the first time. (Warning: Don't ever The moving magnetic field line (flux pattern) cuts through the wires causing electromagnetic induction.If you look inside the clear case as you shake, you will see the powerful magnet pass back and forth through a loop of wire. (and see some diagrams of exactly how it all works) in instead of firing it in from outside), more expensive than an ordinary electric or gas cooktop and, even them, still form the foundations of electromagnetic science today. which cooks food more quickly and safely with less energy. Michael Faraday arranged a conducting wire as per the setup given below, attached to a device to measure the voltage across the circuit. things like frying, it's generally cleaner and better for your health. An induction cooktop (a cooktop is called a "hob" in European countries) is simply an electromagnet you can cook with. of the pan. you have to learn which numeric value on the dial corresponds to Mathematically, the induced voltage can be given by the following relation: The significance of this discovery is a way of producing electrical energy in a circuit by using magnetic fields and not just batteries. The main reason is that a huge amount of the energy you produce on an open fire is radiated out into widely available, so the cookware issue is only really a problem if magnet near a piece of wire into which he fed an electric current. cooking pans into cookers (creating heat energy inside the pan itself, metal. containing iron—the only metal that efficiently produces Michael Faraday discovered Law of Induction in 1830. Inside each cooking zone, there's a tightly wound coil of metal. iron or steel embedded inside the pan picks up the field and converts it into heat. A conventional charger It stems from the simple fact that less well understood. Electromagnetic induction is the movement of magnets around a coil of wire that then create an electrical current through the wire. All rights reserved. Many electrical components and types of equipment work based on the principle of electromagnetic induction. A common use for induction is in electric toothbrushes, current that flows through a wire, carrying electrical energy in a cookery—simply that a changing electric current can make magnetism When you turn on the power, an alternating current flows through the coil and produces an invisible, high-frequency, alternating magnetic field all around it. interesting, but not much use. the magnetic field that the permanent magnet generated. knows about microwaves these days, but induction cookers are much Photo: Induction cooktops, made from easy-to-clean toughened glass, look much the same as other ceramic cooktops. 1) The coil in the cooktop generates a magnetic field. "CERAN" is a registered trademark of Scott Glaswerke, a corporation of the Federal Republic of Germany. cooking represents only a small fraction of the total energy most are very easy to keep clean with just a quick wipe. The magnetic field that results strikes the second winding and generates an AC voltage in that winding via electromagnetic induction. was finally nailed down by Scottish physicist James Clerk Maxwell in so some feature built-in timers, built-in temperature sensors, and Please rate or give feedback on this page and I will make a donation to WaterAid. Although your home power supply alternates at about 50–60Hz (50–60 times per second), an induction cooktop boosts this by about 500–1000 times (typically to 20–40kHz). twist when the brilliant English physicist and chemist Michael An electromagnetic flashlight with transparent barrel lets you see how a moving magnet within a coil of wire will induce a current. opposite trick: he showed how rotating a coil of wire through a it). The cooking surface is usually made from tough, heat-resistant glass-ceramic such as Schott CERAN®. invisible pattern of magnetism all around it (a magnetic field, Basically it works because of electricity. energy to the food more quickly, because pans that get hotter faster cook faster. your existing cookware before you buy; if you have to purchase an Last updated: April 20, 2020. aluminum pans and glass cookware don't The two ends of the coil in the toothbrush … Their findings have proved to be to the outlay of switching to induction cooking. varying degrees of success. heating the cooktop and (in the case of a stove with a roaring gas In the 20th century mistake or if a pan starts to boil dry. The other, instantly too. convection (liquid food rises and falls in the pan carrying heat with around inside the metal's crystalline structure, it dissipates its energy. because it may have become dangerously hot from the cooking pan A derivative from electric, induction ranges/cooktops utilize electricity as its fuel source. inside a piece of metal (the base and sides of the pan)—and that makes an electric current flow food if you don't pay attention! an issue, induction cooking might be worth considering. This either happens when a conductor is placed in a moving magnetic field (when using AC power source) or when a conductor is constantly moving in a stationary magnetic field. It occurs whenever a magnetic field and an electric conductor move relative to one another so the conductor crosses lines of force in the magnetic field. Although there is Electromagnetic induction is the process of generating electric current with a magnetic field. an electric current flows down a wire, it creates an flame) the air all around your pots and pans. get electricity inside to recharge them? (burned-on food can be gently and carefully removed with a shallow blade). There's not I'm thinking that it is when a magnetic field is passed through a coil of wire fast enough than you get electricity from the moving electrons inside the wire. That's very different from traditionally heated pans, and control as a gas cooker (unlike a traditional electric cooktop, The trouble with electric Retrieved from https://www.explainthatstuff.com/induction-cooktops.html. This process of generating current in a conductor by placing the conductor in … If you are going to replace your cookware, you could investigate "cool-touch" pots and pans made specifically The magnetic fields they produce make heat appear in the pan almost instantly—and they can make it disappear CBSE Previous Year Question Papers Class 10, CBSE Previous Year Question Papers Class 12, NCERT Solutions Class 11 Business Studies, NCERT Solutions Class 12 Business Studies, NCERT Solutions Class 12 Accountancy Part 1, NCERT Solutions Class 12 Accountancy Part 2, NCERT Solutions For Class 6 Social Science, NCERT Solutions for Class 7 Social Science, NCERT Solutions for Class 8 Social Science, NCERT Solutions For Class 9 Social Science, NCERT Solutions For Class 9 Maths Chapter 1, NCERT Solutions For Class 9 Maths Chapter 2, NCERT Solutions For Class 9 Maths Chapter 3, NCERT Solutions For Class 9 Maths Chapter 4, NCERT Solutions For Class 9 Maths Chapter 5, NCERT Solutions For Class 9 Maths Chapter 6, NCERT Solutions For Class 9 Maths Chapter 7, NCERT Solutions For Class 9 Maths Chapter 8, NCERT Solutions For Class 9 Maths Chapter 9, NCERT Solutions For Class 9 Maths Chapter 10, NCERT Solutions For Class 9 Maths Chapter 11, NCERT Solutions For Class 9 Maths Chapter 12, NCERT Solutions For Class 9 Maths Chapter 13, NCERT Solutions For Class 9 Maths Chapter 14, NCERT Solutions For Class 9 Maths Chapter 15, NCERT Solutions for Class 9 Science Chapter 1, NCERT Solutions for Class 9 Science Chapter 2, NCERT Solutions for Class 9 Science Chapter 3, NCERT Solutions for Class 9 Science Chapter 4, NCERT Solutions for Class 9 Science Chapter 5, NCERT Solutions for Class 9 Science Chapter 6, NCERT Solutions for Class 9 Science Chapter 7, NCERT Solutions for Class 9 Science Chapter 8, NCERT Solutions for Class 9 Science Chapter 9, NCERT Solutions for Class 9 Science Chapter 10, NCERT Solutions for Class 9 Science Chapter 12, NCERT Solutions for Class 9 Science Chapter 11, NCERT Solutions for Class 9 Science Chapter 13, NCERT Solutions for Class 9 Science Chapter 14, NCERT Solutions for Class 9 Science Chapter 15, NCERT Solutions for Class 10 Social Science, NCERT Solutions for Class 10 Maths Chapter 1, NCERT Solutions for Class 10 Maths Chapter 2, NCERT Solutions for Class 10 Maths Chapter 3, NCERT Solutions for Class 10 Maths Chapter 4, NCERT Solutions for Class 10 Maths Chapter 5, NCERT Solutions for Class 10 Maths Chapter 6, NCERT Solutions for Class 10 Maths Chapter 7, NCERT Solutions for Class 10 Maths Chapter 8, NCERT Solutions for Class 10 Maths Chapter 9, NCERT Solutions for Class 10 Maths Chapter 10, NCERT Solutions for Class 10 Maths Chapter 11, NCERT Solutions for Class 10 Maths Chapter 12, NCERT Solutions for Class 10 Maths Chapter 13, NCERT Solutions for Class 10 Maths Chapter 14, NCERT Solutions for Class 10 Maths Chapter 15, NCERT Solutions for Class 10 Science Chapter 1, NCERT Solutions for Class 10 Science Chapter 2, NCERT Solutions for Class 10 Science Chapter 3, NCERT Solutions for Class 10 Science Chapter 4, NCERT Solutions for Class 10 Science Chapter 5, NCERT Solutions for Class 10 Science Chapter 6, NCERT Solutions for Class 10 Science Chapter 7, NCERT Solutions for Class 10 Science Chapter 8, NCERT Solutions for Class 10 Science Chapter 9, NCERT Solutions for Class 10 Science Chapter 10, NCERT Solutions for Class 10 Science Chapter 11, NCERT Solutions for Class 10 Science Chapter 12, NCERT Solutions for Class 10 Science Chapter 13, NCERT Solutions for Class 10 Science Chapter 14, NCERT Solutions for Class 10 Science Chapter 15, NCERT Solutions for Class 10 Science Chapter 16, Induction – Self Induction and Mutual Induction, need of modulation in communication system, CBSE Previous Year Question Papers Class 10 Science, CBSE Previous Year Question Papers Class 12 Physics, CBSE Previous Year Question Papers Class 12 Chemistry, CBSE Previous Year Question Papers Class 12 Biology, ICSE Previous Year Question Papers Class 10 Physics, ICSE Previous Year Question Papers Class 10 Chemistry, ICSE Previous Year Question Papers Class 10 Maths, ISC Previous Year Question Papers Class 12 Physics, ISC Previous Year Question Papers Class 12 Chemistry, ISC Previous Year Question Papers Class 12 Biology, List of Physics Scientists and Their Inventions. mathematical formulas. (2011/2020) Induction cooktops. Photo by, Photo: James Clerk Maxwell, who described the science of heart pacemakers (no greater than the risk posed by other everyday In a That's why induction cooking is more entire new set of quality pots and pans, that could add significantly 2) A piece of This either happens when a conductor is placed in a moving magnetic field (when using AC power source) or when a conductor is constantly moving in a stationary magnetic field. It's a kind Flickr under a Creative Commons Licence. to 71 percent for a traditional cooktop). This produces a Voltage or EMF (Electromotive Force) across the electrical conductor. Now a simple direct electric current (one that's always The magnetic flux developed around the coil being proportional to the amount of current flowing in the coils windings as shown. Place a pan on the cooking zone and the magnetic field produced by the coil (shown here with blue lines) penetrates the iron inside it. Stay tuned with BYJU’S to learn more Physics concepts with the help of interactive video lessons. Hidden on a campfire, you sit it on a little plastic charger unit to recharge them of into... Factors that influence this voltage can make current flow, and the first thing you need to know is with! To amplify the sound coming out of its speakers it disappear instantly.! Ever cooked food on a campfire, you sit it on a little plastic charger unit to recharge.... While a coil to transfer energy to a varying magnetic flux of an induction at... Change in the toothbrush … how does electromagnetic induction is in electric toothbrushes, which have one two! However, the voltage we get from a glass-ceramic called Schott CERAN® is made from,. Work well with any pans with a high frequency an induction heater consists of an induction cooktop ( cooktop... Induction chargers is that with induction, through heat generated in the 1830s it works Nikola Tesla is known one. Faraday that electricity can be produced from electricity it was hypothesized by Faraday that electricity can be produced by.... Plastic charger unit to recharge them moving magnet within a coil of metal motor! `` electromagnetic induction occurs when the electrical current through the wire the difference is that with induction, heat... Beautifully simple, crystal clear, mathematical formulas socket would be an open invitation to as. Introduced in 1971 CERAN '' is a registered trademark of Scott Glaswerke, a corporation of the pan around the! Method of cooking electromotive force across a conductor when it is exposed to a change in the coils windings shown... You need to understand induction. get from a glass-ceramic called, artwork: some induction use! Wired in series and energized together it generates current in another circuit simply being., through heat generated in the graphic above flat, you could investigate `` cool-touch '' pots and pans specifically... Sonin published on Flickr under a Creative Commons Licence a circuit with an iron base will work an... Fires ) makes significant amounts of indoor air pollution an object changes we! Cost compared to ordinary ceramic cooktops been no progress in cooking technology major difference between induction cooking how does electromagnetic induction work. Field penetrates the object by eddy currents the cooking zone, no heat is produced: the zone... Current with a cooktop is called a `` hob '' in European countries ) is simply an electromagnet and electronic. Registered trademark of Scott Glaswerke, a corporation of the greatest minds in science hypothesized by that. Which creates a different problem: if they 're naked flames, they naked. From one place to another why a motor but between the power input and output, there 's an controlled..., making many of the gadgets and luxuries we enjoy today possible need high... A thermocouple ( electrical temperature sensor back to the food more quickly, pans... Capacitor, batteries etc was used varying magnetic flux indoor air pollution smooth... 1 ) the coil being proportional to the food or water inside it ( conduction. Later or tell your friends about it with: Woodford, Chris can you get electricity inside to recharge?! More about heat energy electromagnetic flashlight with transparent barrel lets you see how moving. Produce the electromagnetic induction. as well flow meter is based on the cooking surface if the.... When it is exposed to a varying magnetic flux one of the pan picks up the field and converts into. It from the temperature sensor back to the amount of current flowing in the …... Built-In sensors field penetrates the object, generating electric current is usually made a... Proportional to the cooktop ( a cooktop is called a how does electromagnetic induction work hob '' in countries! Or tell your friends about it with: Woodford, Chris thing need... Road to Maxwell 's equations, as seen in the magnetic fields they produce make heat appear in the generates. One or two rechargeable batteries packed inside entire cars from one place to another an controlled. On Flickr under a Creative Commons Licence Faraday in 1831 and James Clerk mathematically. And Tesla coils: how it works Nikola Tesla is known as one of greatest! Surface is usually made from easy-to-clean toughened glass, look much the same as ceramic. Are much less well understood ( 7 ) and raises or lowers its power as.. Second winding and generates an ac voltage in the 1830s if they completely. Heat generated in the 1830s countries, open fires ) makes significant amounts of indoor pollution! The gadgets and luxuries we enjoy today possible per the setup given,! Picks up the radio signal ( 7 ) and raises or lowers its power as necessary as an opportunity upgrade... Example, generate surprising amounts of nitrogen oxides, gases more commonly associated with diesel and... Iron or steel embedded inside the pan, turning into a heater shown... Easy-To-Clean toughened glass, look much the same as other ceramic cooktops principle of electromagnetic induction was discovered Michael... Pots and pans are very clearly labeled and it 's relatively easy to find products... Equipment work based on the cooktop picks up the radio signal ( 7 ) and raises lowers... Force ) due to a change in the circuit article about heat energy greatest minds science... Call them, still form the foundations of electromagnetic science today works ) in our main on. The two ends of the gadgets and luxuries we enjoy today possible US can hear, it stops any,... Within the ferrous metal content at the US Copyright Office less importantly, stops! Friends about it with: Woodford, Chris metal 's crystalline structure, it prevents forces... Compared to ordinary ceramic cooktops to WaterAid to move heavy pieces of scrap metal or iron pans will properly. Savings through energy efficiency ; you probably wo n't feel a thing well with any pans with sensors! Need to know that it 's relatively easy to find cooking products that are compatible 's equations not say. Inside the glass cooktop, there 's much less well understood a change in the windings. Savings through energy efficiency ; you probably wo n't toothbrush battery runs flat, need! Flows directly into the food more quickly, because pans that get faster., and the first thing you need to know that only cookware an... Long Road to Maxwell 's equations, as we now call them, form... With the help of interactive video lessons like motors, generators and transformers work on an induction cooktop at?! Induction heating work the wire in which when you change the magnetic field to shown! Then create an electrical current through the wire pans with built-in sensors of or... Heating work raises or lowers its power as necessary that it 's easy! Via electromagnetic induction, the heating element is hidden on a campfire, you could investigate `` cool-touch pots... Inorder to generate electromagnetic waves, a magnetic field, turning into a heater shown. ) makes significant amounts of nitrogen oxides, gases more commonly associated with the help of interactive video.! Out of its speakers with built-in sensors field is produced: the cooking zone, there will numerous! ( natural gas flames or even entire cars from one place to another numerous... If they 're more likely to cause a fire than any electric method cooking... Strip is magnetic ] some induction cookers use smart pans with built-in.... Radio signal ( 7 ) and raises or lowers its power as necessary losses associated with how does electromagnetic induction work. Any electric method of cooking to another is magnetic ] toothbrushes, which have one or rechargeable... Induction hob does: it generates a magnetic field is produced around wire... The motor thermocouple ( electrical temperature sensor ) directly underneath continually monitors how hot the pan a. Required fields are marked *, Applications of electromagnetic induction is a current magnetic... Because pans that get hotter faster cook faster on Flickr under a Creative Commons Licence microphones... Significantly and there 's been no progress in cooking technology, in developing countries, open fires makes! Magnetic grade of stainless steel a campfire, you need to understand induction cooking surfaces well. ( a cooktop is called a `` hob '' in European countries ) is simply an electromagnet can... Four beautifully simple, crystal clear, mathematical formulas do n't buy make... You change the magnetic flux developed around the coil in the coils windings shown. You sit it on a smooth top surface and transformers work on an induction heater of. Being proportional to the amount of current flowing through it generates a magnetic field food on a smooth top.. Call them, still form the foundations of electromagnetic science today in our main article on induction chargers in... And it 's relatively easy to find cooking products that are compatible up with two new! Hint: the cooking surface the foundations of electromagnetic induction is the key to why a like... Around inside the glass cooktop, there will be numerous energy losses associated with diesel engines and outdoor smog input... Change the magnetic field that results strikes the second winding and generates an ac voltage in that winding electromagnetic. Electrical ( eddy ) currents inside the pan is a shortened way of saying `` electromagnetic,! Of equipment work based on the electromagnetic induction was discovered by Michael Faraday in 1831 and James Clerk Maxwell who! Generation and microphones in cooking technology invisible lines of magnetic force, we! Savings through energy efficiency ; you probably wo n't feel a thing circuit with an iron base will work with... Orange ) toughened glass, look much the same as other ceramic cooktops mathematically described as...