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Welcome to our Physics lesson on Magnetism in Use, this is the ninth lesson of our suite of physics lessons covering the topic of Introduction to Magnetism, you can find links to the other lessons within this tutorial and access additional physics learning resources below this lesson.
Magnetism in Use
Magnets have a wide range of use in today's world. In this paragraph, we will briefly discuss only a few of them.
- Magnetism in home appliances
Magnets are used in many home appliances such as in refrigerators, computers, sound systems, etc.
Flexible magnetic strips are enclosed within plastic covers attached around a fridge's door. These magnets keep the fridge's door firmly closed so that no heat is exchanged with the surroundings.
Hard discs of computers are covered by a layer of magnetic material. Magnetism is used in computer storage because it goes on storing information even when the power is switched off.
Sound systems use magnetic materials to transmit the sound through loudspeakers. Inside almost every speaker, there is a magnet, a coil of wire, and a thin material to convey the sound into the air. The invention of strong rare-earth magnets allows speakers to create more sound using less electric current.
- Magnetism in medicine
Magnetic resonance is one of the most marvelous applications of magnetism in medicine. Most imaging techniques make use of X-rays to see inside the human body. Magnetic resonance is one of the revolutionary and techniques besides echo that is not hazardous for the health. Nuclear Magnetic Resonance NMR technique is used in medicine to obtain three-dimensional images of the inner parts of the human body. NdFeB (neodymium) is a high-end rare earth magnet. In terms of medical treatment, NdFeB has been widely used in physical magnetic therapy. Due to its excellent magnetic properties, NdFeB magnets have been widely used in the field of medical treatment. The use of this magnet can increase the blood supply and supply of the brain, reduce the excitability of the nerve of the cerebral cortex, and increase the blood circulation to the organs of the lungs, spleen, liver and perianal, and boost the local blood supply by enhancing the biological electromagnetic energy of the body and collaterals. NdFeB is often used for the physical treatment of a variety of diseases. - Magnetism in industry
Magnetism in industry is mainly used in metal processing technology. Permanent magnets are used to separate metals from non-metals applying the procedure shown in the figure.
You have reached the end of Physics lesson 16.1.9 Magnetism in Use. There are 9 lessons in this physics tutorial covering Introduction to Magnetism, you can access all the lessons from this tutorial below.
More Introduction to Magnetism Lessons and Learning Resources
Magnetism Learning MaterialTutorial ID | Physics Tutorial Title | Tutorial | Video Tutorial | Revision Notes | Revision Questions |
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16.1 | Introduction to Magnetism | | | | |
Lesson ID | Physics Lesson Title | Lesson | Video Lesson |
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16.1.1 | A Brief History of Magnetism. Natural and Artificial Magnets | | |
16.1.2 | Magnetic Field of Magnets and Earth. Magnetic Poles | | |
16.1.3 | Magnetic Field Lines | | |
16.1.4 | How is a Magnet Produced? | | |
16.1.5 | Permanent and Temporary Magnets | | |
16.1.6 | The Earth as a Giant Magnet. Two North Poles. | | |
16.1.7 | Magnetosphere | | |
16.1.8 | Magnetism in Animals | | |
16.1.9 | Magnetism in Use | | |
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- Continuing learning magnetism - read our next physics tutorial: Magnetic Field Produced by Electric Currents
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