do magnets run out of power?

Answer 1

How permanent is a magnet's strength?

If a magnet is stored away from power lines, other magnets, high temperatures, and other factors that adversely affect the magnet, it will retain its magnetism essentially forever.

Will magnets lose their power over time?

Modern magnet materials do lose a very small fraction of their magnetism over time. For Samarium Cobalt materials, for example, this has been shown to be less that 1% over a period of ten years.

What might affect a magnet's strength?

The factors can affect a magnet's strength:

Heat
Radiation
Strong electrical currents in close proximity to the magnet
Other magnets in close proximity to the magnet
(Neo magnets will corrode in high humidity environments unless they have a protective coating.)

Shock and vibration do not affect modern magnet materials, unless sufficient to physically damage the material.

Answer 2

They can and do, but you have to make the magnet spin first. The idea is simple. If you move a wire near a magnet, the magnet will drag electrons along inside the wire and create a current. The simplest (and actually pretty correct) way to understand it is that electrons are little magnets themselves. If you have a rotating magnet inside a wire coil then you can get some pretty good currents going. You can also leave the magnet stationary and spin the coil around it; it's your choice. Different power plants supply this energy in different ways. A wind turbine uses fan blades. A coal plant uses the steam made by heating water with burning fossil fuels to turn a turbine, which in turn spins a generator. A nuclear power plant boils water too, only using nuclear reactions instead of burning coal. There's no way to make a magnet generate electricity without something moving. A generator without anything keeping it turning will slow down very rapidly as it loses energy in the form of electricity. You can convert heat into kinetic energy and kinetic energy into electrical energy, but you're not allowed to actually make energy from nothing. Sorry. The law of conservation of energy seems to be pretty fundamental to physics and no one has found a way around it yet.

Answer 3

yes. they lose their "power" .

a magnet works because all its particles are "facing" the same way.... so all the North sides of electrons are facing north and the south ones south.... etc

over time, and for example, if you drop a magnet, they become less "power full" because the particles get knocked around and go back to the position they want... so they are comfortable again :)

i hope that makes sense...

(try getting a pin... get a magnet and run it down the side in ONE DIRECTION... making sure you keep the magnet away from it between each motion... it will be magnetic... but wait a while and it wont be... the particles will go back to the way they were facing)

Answer 4

Yes, the more you resistance you put into the magnetic field, the less magnetic it gets. For example, if you hold to north poles of two magnets together, and keep pushing against the repulsion, the magnetic force will eventually weaken and fade away.

Answer 5

Try this. Bring a magnet in contact with a piece of steel. Introduce heat to the magnet, something on the line of four to five hundred degrees. What are the results?

Answer 6

Yes but after they eat some spinach they are back to full strength .... oh hang that's Popeye
Permanent magnets will lose some of it's field strength over time as a result of damage to it from movement within other external magnetic fields such as the Earth's

Answer 7

Yes, which is why large magnets have keepers to help prevent the magic magnetic power from escaping.

Answer 8

i will try to make it ease. magnet are divide into two categories.the parmanent and temporary. both of them are magnet but they only differ in type of material.
all material especially metal have a 'thing' inside them called 'magnets material'. we can say it is a small magnet bar inside metal(they have north and south). this magnets material scatter inside magnets randomly. but the metal dont behave like a magnet cause not all north/south facing a side and opposite.look here how it's look like.
http://jiraiya-weblog.blogspot.com/2006/09/magnetoasking-at-yahoo-ask.html

when a magnet is attach closely to a metal, 'magnets material will begin to arrange themselves in a same pattern, where north facing one way and south facing opposite north. then they become a magnet metal.

temporary magnet can easily run out power if they experience to drop on the floor, being hammered, being heated. also they can lose power if we swing another magnet behind it to scatter back it's magnet material. permanent magnet also lose power but it's harder.

so, MAGNET DO RUN OUT THEIR POWER.
sorry, does it hard to understand?

Answer 9

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Answer 10

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Answer 11

Yes, Magnets slowly lose their magnetic property over time....