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magnetic fields - aqa

by:Newland     2020-02-29
Iron, steel, nickel and cobalt are magnetic materials.
They are affected by the magnet and are attracted by either pole of the magnet.
Permanent magnets are usually made of magnetic materials such as iron.
Permanent magnets always produce force on other magnets or magnetic materials.
The main feature of a permanent magnet: it produces its own magnetic field. The magnetic field cannot be turned on and off
All time bar magnets and horseshoe magnets are examples of permanent magnets.
Unlike permanent magnets, induction magnets are attracted by magnetic rods, and induction magnets become magnets only when placed in a magnetic field.
When the magnet is removed from the magnetic field, the inductive magnetic field is quickly lost.
When the iron chip is close to the bar magnet, the iron chip in the image becomes an induction magnet.
Like all induction magnets: they are only attracted by other magnets, and when they are removed from the magnetic field test of the permanent magnet of the magnet, they are not reloaded, they lose most or all of the magnetic materials that attract or reject another permanent magnetic attraction (
But not excluding it)
This means that you can only show that an object is a permanent magnet by checking if it repels another magnet.
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