why magnet are kept in magnetic keepers
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A permanent magnet is a piece of iron or a similar metal having its own magnetic field. Under ideal conditions, it will retain its magnetic strength for many years. Frequent drops, impacts or high temperatures weaken it. A piece of iron, called a keeper, fits over the magnet's poles, helping it retain its magnetism during long periods in storage.
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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.
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