How does magnetism work?
Ages ago I left a pair of scissors in a drawer with a small magnet. The scissors now pick up small metal items (pins etc). Why is this? The magnet's long gone so will the magnetism stay? How long?
Answers:
Hi.. Well magnetism is all about Di-poles. There are north & south poles. North poles are the ones which getz attracted to the geographical south & the south poles is one which getz attracted to the geographical north.These can't exist as Single. So what happenz exactly is when u've placed the magnet ..The north poles of the magnetz attract the south poes of the Dipoles in the metals & Vice versa with the south ..so After a while it getz a tendency to act as a magnet..& the magnetz gonna stay for a long time unless u try to demagnetise it..Thats by throwing it down from heights Etc..
You can do the same thing by rubbing a magnet on a pair of scissors in one direction.
This works because it moves all the electrons in one direction, thus creating magnetism.
It won't last forever, though. It will fade somewhat as the electrons move back to their original position.
No one knows
its a mystery!!!!!!!!!!!!.
It is related to the alingment of atoms in the metal. The scissors lying beside the magnet for so long had its atoms Re..
Aahhhh. No one really knows!
(m)
goto the below link, it explain how magnet is working with pictures
http://home.interserv.com/~skyblade/wim..
http://en.wikipedia.org/wiki/magnets.
Drop them on a hard floor, give them a big wack, it often stops the magnetism, I would also love to know why..
like forces repel, opposite forces attract..the magnet transmits its magnetism like people spread a cold virus. it depends on how long the magnet has stayed with the scissors.
you can "magnetize" any metal by rubbing any magnet on it or around it.
The scissors have become magnetized. That's because the molecules in the scissors have been oriented by the magnetic field of the magnet. A magnet looses its magnetic properties when it reaches the Curie temperature. So If you heat up a magnet to about 100-200 degrees C it will loose it's prop.Also a magnet can be demagnetized in the laboratory using the hysteresis curve, which shows the dependence between B and H
(B-magnetic field intensity, H-magnetic field induction).
I forgot to add that only polar magnetic materials can be magnetized (iron etc), that means that the molecules can be oriented in the direction of the magnetic field. Other metals called non-polar magnetic materials can't be magnetized (gold, silver, copper, aluminium, etc)
It is an electric charge with a positive and negative what will have happened is that over the time the magnet discharged onto the scissors which now have a magnetic. This is how you get magnetic screwdrivers and magnetic tools for picking up dropped objects.
If you put two magnets together with positive edges next to it it will repel each other they need the positive edge on one to be next to the negative of the other to attract each other and that is how a magnet works.
Heating the magnetized item with naked flame will demagnetise quickly due to the increased vibrations of the magnetic particles in the magnetized item and thus causes them to lose their alignment. and thus demagnetised.
all metals are differnet could be 1 week could be 2 month
only way for to lose the magnitisim fast is to pass the scissors through a charges electro coil, coil has to sit north to south and pass the sissors through in an east to east direction a couple of times and they will lose the charge.
It is to do with the spins on the electrons lining up. In a magnet they all go in the same direction. The electrons in the scissors were then encouraged to also spin in that direction, and so they became magnetic too. They will stay magnetic until heat-induced fluctuations change the spins so that they don't have a net direction anymore.
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Answers:
Hi.. Well magnetism is all about Di-poles. There are north & south poles. North poles are the ones which getz attracted to the geographical south & the south poles is one which getz attracted to the geographical north.These can't exist as Single. So what happenz exactly is when u've placed the magnet ..The north poles of the magnetz attract the south poes of the Dipoles in the metals & Vice versa with the south ..so After a while it getz a tendency to act as a magnet..& the magnetz gonna stay for a long time unless u try to demagnetise it..Thats by throwing it down from heights Etc..
You can do the same thing by rubbing a magnet on a pair of scissors in one direction.
This works because it moves all the electrons in one direction, thus creating magnetism.
It won't last forever, though. It will fade somewhat as the electrons move back to their original position.
No one knows
its a mystery!!!!!!!!!!!!.
It is related to the alingment of atoms in the metal. The scissors lying beside the magnet for so long had its atoms Re..
Aahhhh. No one really knows!
(m)
goto the below link, it explain how magnet is working with pictures
http://home.interserv.com/~skyblade/wim..
http://en.wikipedia.org/wiki/magnets.
Drop them on a hard floor, give them a big wack, it often stops the magnetism, I would also love to know why..
like forces repel, opposite forces attract..the magnet transmits its magnetism like people spread a cold virus. it depends on how long the magnet has stayed with the scissors.
you can "magnetize" any metal by rubbing any magnet on it or around it.
The scissors have become magnetized. That's because the molecules in the scissors have been oriented by the magnetic field of the magnet. A magnet looses its magnetic properties when it reaches the Curie temperature. So If you heat up a magnet to about 100-200 degrees C it will loose it's prop.Also a magnet can be demagnetized in the laboratory using the hysteresis curve, which shows the dependence between B and H
(B-magnetic field intensity, H-magnetic field induction).
I forgot to add that only polar magnetic materials can be magnetized (iron etc), that means that the molecules can be oriented in the direction of the magnetic field. Other metals called non-polar magnetic materials can't be magnetized (gold, silver, copper, aluminium, etc)
It is an electric charge with a positive and negative what will have happened is that over the time the magnet discharged onto the scissors which now have a magnetic. This is how you get magnetic screwdrivers and magnetic tools for picking up dropped objects.
If you put two magnets together with positive edges next to it it will repel each other they need the positive edge on one to be next to the negative of the other to attract each other and that is how a magnet works.
Heating the magnetized item with naked flame will demagnetise quickly due to the increased vibrations of the magnetic particles in the magnetized item and thus causes them to lose their alignment. and thus demagnetised.
all metals are differnet could be 1 week could be 2 month
only way for to lose the magnitisim fast is to pass the scissors through a charges electro coil, coil has to sit north to south and pass the sissors through in an east to east direction a couple of times and they will lose the charge.
It is to do with the spins on the electrons lining up. In a magnet they all go in the same direction. The electrons in the scissors were then encouraged to also spin in that direction, and so they became magnetic too. They will stay magnetic until heat-induced fluctuations change the spins so that they don't have a net direction anymore.
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