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Hard disk drives contain neodymium-iron-boron magnets. Their role is to control the movements of the heads that read and write data. The data is on the platters and remains unchanged. Without the presence of a powerful magnet, the information remains on the hard drive.
-Jeffrey

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Magnets are employed to create an opposing magnetic field that causes vibrations in the cone (or panel) of the speaker. The sound we hear is made up of these vibrations. Large magnets are commonly found within speakers, as a greater opposing magnetic field produces more vibrations.

-Vi-Ann Delos Reyes

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It is used in many different appliances. without this, electromagnetic conduction will not work. It is one of the basic materials needed in most mechanical equipments.
-jvr

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Mag-Lev trains are trains that use magnets to hover above the ground. This is because there are huge magnets on the bottom side of the train and on the tracks that repel each other. Because of this, these trains can travel very fast - even up to 200mph
-Angelyn

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Compass is simply a thin magnet or magnetized iron needle balanced on a pivot. The needle will rotate to point toward the opposite pole of a magnet. It helps in navigation by pointing toward the North magnetic pole and also useful in detecting small magnetic fields. -Jodelyn Eltagunde

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Transformers are used either to increase (step-up) or decrease (step-down) the voltage of an appliance. They usually have two sets of coils. For a step-up transformer, there are greater number of turns in the secondary coil, while for a step-down transformer, there are less number of turns in the secondary coil compared to the primary coil.

- Deah E. Elmundo

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Speakers utilize electromagnetism to turn the AC voltage of the audio signal into diaphragm movement within a magnetic field to produce sound.

-Jaeralene Reyes

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For example- Edrian Pingol: Junkyard Magnet

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For example- Edrian Pingol: Junkyard Magnet

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This uses a electromagnets where the magnetic property will only work if electricity is present.

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Magnets are found in some commonly used medical equipment such as and Magnetic Resonance Imaging machines. MRIs use powerful magnetic fields to generate a radar-like radio signal from inside the body, using the signal to create a clear, detailed picture of bones, organs and other tissue. An MRI magnet is very strong – thousands of times more powerful than common kitchen magnets.

- Ericka Joy Rivera