Magnets are stored with magnetic keepers because with time magnets tend to lose their magnetic behavior. This is called self-demagnetization. To avoid this, pieces of iron known as keepers are placed across both ends of a magnet. These keepers help the Magnet to preserve its magnetism over a long period of time.
A magnetic keeper is a piece of wood or soft iron which is used in storing magnets because bar magnets get demagnetised when the poles are left free for a long time. In order to preserve the magnetism of the magnets, a keeper is kept across a pair of bar magnets with unlike poles beside each other.
because with time magnets tend to lose their magnetic behavior. This is called self-demagnetization
demagnetization
Demagnetization:-
The process used for destroying the magnetic properties of a magnet is called demagnetization. For example:- A magnet is heated then it loses its magnetic properties. In other words removal of magnetic strength from a magnetic substance is called demagnetization.
. To avoid this, pieces of iron known as keepers are placed across both ends of a magnet. These keepers help the Magnet to preserve its magnetism over a long period of time.
When magnets are kept for a long time leaving the magnetic poles free or exposed, they slowly lose their magnetic properties. Therefore, magnets have to be preserved to prevent the loss of magnetic properties.
Keepers are small pieces of the soft iron core, placed across the poles of the magnet to help preserve the strength of the magnet by completing a magnetic circuit. A keeper protects the magnet from getting attracted to other pieces of metal as well.
Keepers also have a useful safety function, as they stop external metal being attracted to the magnet. Many magnets do not need a keeper, such as supermagnets, as they have very high coercivities; only those with lower coercivities, meaning that they are more susceptible to stray fields, require keepers.
The keepers become induced magnets, which in turn neutralises the poles of the actual magnet. Thus, they help to preserve the strength of a permanent magnet by completing the magnetic circuit. Here in the image, we can see rectangular pieces of soft metal attached at the end of two bar magnets.
To prevent this, bar magnets are placed side by side with opposite poles near. A soft iron piece called a keeper is placed across the poles as shown in figure. This soft iron piece provides a path for the magnetic field lines to form a continuous loop. Thus it helps in preserving the magnetic field.
The soft iron bar acquires the magnetic properties only when an electric current flows through the solenoid and loses the magnetic properties as soon as the current is switched off. That's why soft iron is used as the core of the electromagnet in an electric bell.
Bar magnets should be stored in pairs always, with their unlike poles on the same side separated by a piece of non-magnetic material like wood and covered by magnetic materials, like soft iron at the edges/poles in the following manner. Q. Soft iron pieces are placed across the ends of a bar magnet while being stored.
Not even theoretically. Humans are basically diamagnetic, because they are mostly water. Therefore, if you got a large enough magnet, you could repel (or levitate) a person with it, but you could not possibly attract a person with it.
Magnets should be kept in pairs with their unlike poles on the same side. They must be separated by a piece of wood while two pieces of soft iron should be placed across their ends.
Magnets must be handled with care or else they lose their magnetic properties and become weak. To prevent a magnet from becoming demagnetized, the magnet should not be handled roughly, hammered, dropped, heated. It should be stored using magnetic keepers.
Explanation: Magnets should be stored as mentioned below: Magnets should be kept in pairs with their unlike poles on the same side. They must be separated by a piece of wood while two pieces of soft iron should be placed across their ends.
Magnets should be stored in pairs with their unlike poles kept on the same side, soft iron should be kept on both the ends and they must be separated by a piece of wood so that they don't become weak over time.
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