PHY 580 APPLICATION OF ELECTROMAGNETIC IN LIFE MICROWAVE NAME: MUHAMMAD AMAR FAHMI BIN ISMAIL 2016803528 GROUP: AS203 3ALECTURER’S NAME: PROF.
MADYA.DR. AZHAN BIN HASHIM CONTENTS PAGES 1. CHAPTER 1 : INTRODUCTION 1.1 – THE ELECTROMAGNET 1.
2 – ELECTROMAGNET IN DEVICE 1.3 – PRINCIPLE OF ELECTROMAGNETIC IN MICROWAVE 3 5 7 2. CHAPTER 2 : LITERATURE REVIEW 2.1 – MICROWAVE 2.2 – HOW MICROWAVE WORKS 2.3 – ROLE OF MICROWAVE 11 13 14 3.
CHAPTER 3 : CONCLUSION 15 4. CHAPTER 4 : REFERENCES 16 1.1- ElectromagnetDEFINITIONElectromagnetic waves are waves created by cause of vibrations between electric and magnetic fields. Specifically, the electromagnetic wave has both magnetic and electric fields swinging.
Electromagnetic waves are used to transfer either short, long or FM radio waves, and the TV, phone, wireless or energy signals. They are also in charge for transmitting energy in the form of microwaves, infrared radiation, visible light, ultraviolet light, X-ray, and gamma rays. DESCRIPTIONAn electromagnetic wave is found when the electric field meets the magnetic field. It is known as electromagnetic waves. The electrical and magnetic fields of electromagnetic waves at the right angle to the exact angle of each other.
It is also straight to the EM wave direction. Electric charge vibration creates electromagnetic waves and this oscillation produces a wave that has both electric and magnetic components. Electromagnetic waves carrying energy through vacuum at speeds of 3.00 x 108 m / s. The transmission of electromagnetic waves through material media take place at net speeds less than 3.
00 x 108 m / s. They are not guarded by electric fields, or by magnetic fields. However, they may show bias or divergence. Electromagnetic waves can flow through anything, it can be air, solid or vacuum material. It does not need the medium to propagate or travel from one place to another. Mechanical waves such as sound waves or water waves, require a medium to move.
The EM wave is a ‘transverse’ wave. This means they are measured by the amplitude or altitude and the wavelength which is the area between the highest or lowest point two successive waves. The highest point of the wave is known as ‘peak’, while the lowest point is known as ‘trough’.
Electromagnetic waves can be divided into various frequencies. This is known as the electromagnetic spectrum. 1.2 – ELECTROMAGNETIC IN DEVICEWhat is a destructive area, your rock show and your front gate have in typical?Each of its use electromagnetic devices that make magnetic fields overelectricity use.
Destructive lane uses powerful electromagnet to move pieces ofiron or the whole trains from one place to another place. Your beloved band useelectromagnetic to amplify the sound that appear from its speakers. And whensomeone rings your doorbell, a minuscule electromagnet takes out metal lumps oppositeto the bell. Mechanically, the electromagnet is effortless enough. It has aconductive wire length, usually copper, encased in a piece of metal. Just likeFrankenstein’s monster, it looks like more than a compilation of relaxed toolsuntil electricity goes into the picture or art.
But you do not have to wait fora storm or lightning to bring electromagnet to life. The current is brought in,one or the other from batteries or any electrical origin, and flows through thewires. This will produce a magnetic field around a coiled wire, magnetizingmetal as if it were a permanent magnet. Electromagnetic is effective becauseyou can turn on and off the magnet by completing or interrupting the respectivecircuit.
Before we are going further, how electromagnetic is distinct from your”fixed” magnets, such as those that hold your Popsicle art inside therefrigerator must be explained. As you know, the magnets have two pillars,”north” and “south”, and it is draw attention objects madeof iron or some of its mergers. As poles evict and conflictingly drawingattention. For illustration, if you have two bar magnets with the ends marked”north” and “south,” the northern tip of one magnet willpull the other end of the south. On the adverse, the northern tip of one magnetwill confront the other end of the north and, the south will turn aside south.Electromagnetic is the same way, other than it is temporary or momentary amagnetic field only occur when the electric current flows. Doorbell is a good example for showing how electromagnetic can be usedin applications in life where permanent magnets will not make any sense.
Whenthe visitor pushes the button at the front door, the electronic circuit insidethe doorbell closes the electric loop, which means the circuit is finished and”turned on.” The closed circuit allows the flow of electricity toflow, constructing a magnetic field and lead to the clapper to become a magnet.The hardware of most door workshops subsists of metal bells and metal wardswhich, when magnetic charges lead them to gather together, you listen the soundindoors and you can give feedback the door.
The bell rings, the guest releasesthe button, the open circuit and the doorbell stops from the infernal ring.This on-demand magnetism is what makes electromagnetic so advantageous. 1.3- PRINCIPLE OF ELECTROMAGNETIC IN MICROWAVE ExplanationMicrowave ovens work by producing microwaves, this is a kind of electromagnetic wave such as radio waves, infrared or visible light. They are created by a device called magnetron and left from the hole to the right.
The components called magnetron generate microwaves from electricity in the microwave. To drive the magnetron, the transformer converts standard household electricity from a wall socket of 120 volts to about 4,000 volts or higher. The voltage heats the filaments at the center ofthe magnetron that boils off electron.
The electrons are whirled around by tworing magnets. The microwaves will reflect from the two sides of the metaloven. This creates wave at a specific frequency, typically 2.45 gigahertz.Microwave wavelengths are tuned to make standingwaves. Here’s where you get two waves, one goes in every direction, itinteracts to make some areas where there is a huge vibration and the otherwhere there is not. This means there is a place where the microwave is very fierce, where the molecule will vibrate strongly until it is heated strongly. Others where microwaves are weak.
The area is separated by half the wavelength. Therefore, there is a turntable in the microwave, otherwise the portion of your food will mature, and the other will remain crude. If you put bread in the microwave, the first butter will melt where the microwave is the most intense, so the distance between it will be half the wavelength.What Has the Wavelength Got to Dowith The Speed of Light?Your microwave oven produces a microwave that vibrates at a certain frequency, it is written behind your microwave.
The wavelength depends on how fast the vibrating waves or the frequency and how fast they move because they are the kind of light, the speed of light. So, this means if the wave has a 100Hz frequency it will wavelength 100 times in one moment. Wave speed is frequency × wavelength.Because the microwave is the kind of light you just measured the speed of light in your kitchen! 2.1- MICROWAVE OVEN Microwave is effective and can cook food speedily, with no heat originvisible as they straight heat energy into molecules that are microscopicparticles inside the food.
Microwave heaters like hot sun heat your face withradiation. When baking the oven, you can sense the high temperature, and abovethe kitchen, you can see the fire emanating from the surface. When you turn onthe microwave, it produces a radiation wave that penetrates your food, breaksdown water molecules and makes them fur with energy. Microwave ovens are a category of electromagnetic radiation, like radio waves, ultraviolet radiation, X-rays and gamma rays. Microwave has a broad area of utilization, including connection or communication, radar, or sonar and, probably most famous by most people, cooking. Electromagnetic radiation is broadcast in waves or particles at distinct intuition and frequencies. It is an unseen electric and magnetic arrangement that enter the air with 300,000 km of light or 186,000 miles per second.
Although radio waves can be very lengthy with a few kilometers or kilometers between waves and outside limit, they can also be miniature, microwaves are the shortest radio waves and microwaves that cook foodstuff in your oven just 12 cm, about 5 inches long. Despite its small size, microwave ovens bring a lot of energy. A microwave disadvantage is that they able destruct living cells and tissues. Microwave radiation can heat the body tissues in the alike it warms up food. Disclosure to significant levels of microwave can cause hurtful fiery. Two areas of the body, eyes, and testes, are very susceptible to radio recurrence heating because there is limited blood flow in them to bear exuberance heat.
In addition, lenses are intensely sensitive to heat and exposure to high elevation levels can cause cataracts. Blaze and cataracts can only be caused by disclosure to many microwave emissions. Therefore, the microwave oven is ringed by a strong metal box that does not grant the waves to getaway. In normal operation, the microwave oven is safe.
Even so, microwave ovens can be very treacherous, so do not waste yourself in the microwave..2.2- HOW MICROWAVE WORKSThis is the way how electricity change into heat.1. First thing is metal box which is located inside the microwave.
This metalbox function as generator called magnetron. When we turn the plug on, magnetrontake power from electricity and converts into high power about 12cm (4.7) radiowaves.2. The magnetron spread the wave into the food compartment which is called waveguide.
3. Food can cook evenly because it placed on turntable and spinning slowly.4.
Just like a mirror, the wave in a wave guide can bounce back surrounding.However, when the wave straight to the food, it can penetrate inside the foodjust like radio wave can pass to the wall of your house. So, this is why foodcan cook evenly because the molecules inside the food vibrates quickly.5. The faster molecules vibrate, the hotter the food become. This is howmicrowave transfer their energy into the food by using molecules. 2.3- Role of microwave Reheating- One of the role of microwave is it can reheat the food until the food becomewarm without soggy.
It just took only a second and it can turn the food likeoriginal form. This is a reason why microwave is very popular to use, not onlyin a kitchen, it used widely in a bakery or another food joints. If food isless, it just took one into two minutes only, if more quantity, it can tookabout ten to fifteen minutes.Defrosting- One of the main function that can applied to microwave is defrosting. Defrostingis a thawing the food before cooking it. But in microwave, we can defrost ourfood just in a minute for example meat and vegetables. By using this function, we also can retainthe food in original form and nutrients and also can avoid wastage of water bywashing it, draining, and time.Boiling and steaming- We can boiling and steaming the food either using stove or microwave.
But thedifferent is, microwave boiling the food evenly, while stove not. Any otherfoods or vegetables, we can be boiling or steaming according how long the timewe set up and to make sure the nutrients still retain in the foods. Based onexperiment vision, scientist do more prefer to use microwave than stove to boilor steam your food3. CONCLUSIONThere have a lot of things thatwe can found in physics. The example is electromagnetic radiation. Some calledit EM, either is EMR.
EMR is a wave of photon that carrying electromagneticradian energy through space over time. Its include radio waves, microwaves,infrared, visible light, ultraviolet, x-rays and gamma rays.In EMR, there have a good side and bad side that we can list from EMR. The badside is EMR can affect our healthy and our body based on radiation emits eitherin electric, magnetic, wireless/RF/microwave/WiFi or ionizing. These technologyinfluences our healthy based on how far we are living and how frequent we usein these technology.However, there also have many types of good things in EMR such as telephone,navigation, radio, television, medical scanner, Wi-Fi and the things what wediscussed in the topic is cooking & heat which is microwave oven. Microwaveoven is widely used in the world either in the kitchen, stall, market or foodcourt.
This is because microwave oven can save time, easy to heat food, easy toclean, no need to keep a watch, retains nutrients and vitamins in the food. 4. REFERENCES 1. bennett. (2015, 6 14). electromagnetic waves.
Retrieved from the economic times: https://economictimes.indiatimes.com2. woodford, c. (2017, 5 12).
explainthatstuff. Retrieved from microwaveovens: http://www.explainthatstuff.com3. Marshall Brain Looper “HowElectromagnets Work” 1 April 2000.HowStuffWorks.com.