1 ECE 170 Assignment 1 Instructor: Dr. Mohammed Abdul Majid Student Name:- ID:- Lama Alsabban S141071002 Table of contents: Introduction 3 Application 1 Micro-Wave 4 Application 2 X-Ray 6 Application 3 Speakers 8 References 103 Introduction A branch of physics deals with electric current or fields and magnetic fields and their association on substance or matter is called Electromagnetism. Electromagnetism has made an extraordinary revolution in the field of engineering applications. moreover, this caused an extraordinary effect on different fields such as medical, industrial, space, etc. Th principles of electromagnetic Induction could be explained in two laws, Faraday’s law and Len’z law. In faraday’s law of electromagnetic induction is the process of what an electromotive force (EMF) is induced in a closed circuit to change the magnetic field which surrounded around the circuit. In Len’z Law of electromagnetic induced is when the direction in a closed circuit of the Induced electromotive force (EMF) and the induced current is regularly such as to oppose the change in magnetic flux producing it.
We can discover huge practical application of electromagnetism in everyday life from domestic appliances to research applications.4 Micro-Wave a micro-wave contains three main components, first of all a vacuum tube called magnetron it generates the energy that heats food. Second a waveguide hidden in the wall to direct that energy to the food.
Third chamber to hold the food and safely contain the microwave radiation. In principle, a microwave oven heats no differently than any other type of heat transfer. At a molecular level heat is a transfer of energy that results in increased motion of the molecules in a substance. Since we aren’t quantum-sized, we observe this increase in motion as a rise in temperature. In a traditional oven or stove we heat food by placing a pan on a burner or in the oven where the walls radiate heat, which cooks the outside of the food.
the inside cook when heat transfers from the surface of the food to its interior. In contrast, energy from the magnetron penetrates into the food, which means the whole mass of the food can be cooked simultaneously. how does it do this? Well, our food id filled with water, which is positively charged at one end, and negative at the other. To give these molecules more energy, we expose it to electromagnetic waves that emanate from the tube. By definition, the waves have electrical and magnetic fields that change direction rapidly.
56 X-Ray X-rays are a sort of light ray, similar like the visible light we see it in daily life. But the difference between the x-rays and the visible light is the wavelength of the rays. Human’s eyes cannot see light with longer wavelengths, for examples radio waves, or light with shorter wavelength like the x-rays. When high energy electrons in the cathode tube hit a metal component, they either got slowed down and released extra energy, or kicked off electrons from the atoms they hit, which triggered reshuffling that again released energy.
In both cases, the energy was emitted in the form of X-rays, which is a type of electromagnetic radiation with higher energy than visible light, and lower energy than Gamma rays. X-rays are power full enough to fly through many kinds of matter is if they are semi-transparent, and they’re particularly useful for medical applications because they can make image of organs, like bones, without harming them, although they do have a small chance of causing mutations in reproductive organs, and tissues like the thyroid, which is why lead aprons are often used to block them.78 speakers The purpose of a loudspeaker is to convert electrical energy into acoustic energy. What inside the speakers:- 1.Cone 2.Electromagnet(coil) 3.
Permanent magnet When an electrical current flow through a metal coil it will creates a magnetic field. This coil behaves a normal magnet, with one specifically handy property: it reversing the direction of the current in the coil flips the poles of the magnet. What we can find inside the speaker in front of the permanent magnet an electromagnet.
And the permanent magnet is fixed settled solidly into position while the electromagnet is mobile. When the electricity pulses go through the electromagnet coil the direction of the magnetic field will be changed rapidly. Which means it turns attracted and rappelled from the permanent magnet and vibrating forth and back.
The electromagnet is connected to a cone which is wade of flexible tools and materials such as plastic or paper that amplifies these vibrations and pumping the sound waves into surrounding air.910 References E. (2012, June 26). How a Microwave Oven Works.
Retrieved February 13, 2018, from https://www.youtube.com/watch?v=kp33ZprO0Ck. What is MICROWAVE? What does MICROWAVE mean? MICROWAVE definition, explanation and pronunciation. (2016, March 14). Retrieved February 13, 2018, from https://www.youtube.com/watch?v=bHk5w–4zTQ.
T. (2015, June 22). How X-rays see through your skin – Ge Wang. Retrieved February 13, 2018, from https://www.youtube.com/watch?v=gsV7SJDDCY4 How Does an X-Ray Work? (n.d.
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(n.d.). Retrieved February 22, 2018, from https://www.encyclopedia.
com/science-and-technology/physics/physics/electricity-and-magnetism What are some examples of magnetic energy? (n.d.). Retrieved February 22, 2018, from https://www.reference.
com/science/examples-magnetic-energy-57c8186538089430 Electromagnetic Waves. (n.d.). Retrieved February 22, 2018, from https://physics.tutorvista.com/waves/electromagnetic-waves.html