Metals can be made magnetized. Any kind of iron alloy, ie steel, can be very magnetic.
2006-06-20 12:23:45
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answer #1
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answered by Fat Guy 5
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Iron is the best answer is already stated. However, permeativity to magnetism can be inceased several ways. For example, if you need to make a good inductor, such as a transformer, where the coil windings and magnetic field in the primary coil will create a magnetic field in the secondary coil, and thus electricity, you want the highest possible magnetic conductance coupling the two coils to each other. One way to do that is to take skinny individual metal plates and place them right next to each other and create a square magnetic conductor rather than one big piece of iron of equal thickness. The relationship of coil windidings to voltage is: N1/n2 =V1/v2, so the ratio of turns of N1 (primary coil) devided by turns ratio of the secondary coil is the voltage ratio. So for example, if we want 40 volts from the secondary, but have 120 volts from the primary, we have 120/40=30:1 ratio. So if the primary winding is 300 turns and the secondary winding is 10 turns, we would achieve the desired effect. Because 300:10 is like 30:1. However, this would not be possible without a highly efficient magnetic coupling between the two coils. If the "coefficient of coupling" is less, the formula is not as accurate. So in a way, you have an indirect way of measuring magnetic saturation of a magnetic conductor. Also, sprinkinling iron particles on a piece of plastic that winds from reel-to-reel is how audio cassettes and VHS video cassets work. The magnetic field that carries the audio is encoded in the magnetic pattern of the iron particles. I hope I helped. Any more questions feel free to ask
2016-05-20 06:31:26
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answer #2
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answered by Anonymous
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Magnets are pieces of metal that have the power to attract other pieces of metal
- Magnets attract objects made of iron or steel
- Magnets have a 'N' and 'S' pole
- Like poles push away or repel
- Different poles pull together or attract
Magnetism is the force where objects are attracted or repelled to one another. Usually these objects are metals such as iron.
Magnetic Poles, Forces, and Fields
Every magnet has two poles. This is where most of its magnetic strength is most powerful. These poles are called north and south or north-seeking and south seeking poles. The poles are called this as when a magnet is hung or suspended the magnet lines up in a north - south direction. When the north pole of one magnet is placed near the north pole of another magnet, the poles are repelled. When the south poles of two magnets are placed near one another, they also are repelled from one another. When the north and south poles of two magnets are placed near one another, they are attracted to one another.
The attraction repelling of two magnets towards one another depends on how close they are to each other and how strong the magnetic force is within the magnet. The further apart of the magnets are the less they are attracted or repelled to one another.
When a magnet is broken into little pieces, a north pole will appear at one of the broken faces and a south pole. Each piece, regardless of how big or small, has its own north and south poles. The are around a magnet can also behave like a magnet. This is called a magnetic field. The larger the magnet and the closer the object to the magnet, the greater the force of the magnetic field.
Magnetic Materials
The term magnetism is derived from Magnesia, the name of a region in Asia Minor where lodestone, a naturally magnetic iron ore, was found in ancient times. Iron is not the only material that is easily magnetized when placed in a magnetic field; others include nickel and cobalt.
Magnets can also be formed that are called electromagnets. A simple electromagnet is formed with a battery and copper wire coiled around a metal rod such as a nail. There is evidence that there is an electrical basis for magnetism.
2006-06-20 12:32:07
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answer #3
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answered by floridagrandma 3
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thats simple the magnet will attract itself and repell itself when flipped around steel is most attracted
2006-06-20 12:26:57
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answer #4
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answered by david j k 2
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Pure iron.
2006-06-20 12:33:30
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answer #5
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answered by Kenneth H 5
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