Permanent & Induced Magnets (OCR GCSE Physics A (Gateway Science Suite)): Flashcards
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What are permanent magnets?
What are permanent magnets?
Magnets that always create their own magnetic field
Can permanent magnets be turned on/off?
Can permanent magnets be turned on/off?
No, their magnetism cannot be turned on or off
Examples of permanent magnets
Examples of permanent magnets
Bar magnets and horseshoe magnets
What are induced magnets?
What are induced magnets?
Temporary magnets that become magnetised when placed in a magnetic field
Alternative name for induced magnets
Alternative name for induced magnets
Temporary magnets
Can induced magnets repel other magnets?
Can induced magnets repel other magnets?
No, they can only be attracted to magnets
Do induced magnets have fixed poles?
Do induced magnets have fixed poles?
No, they do not have fixed poles
What happens to induced magnets when field is removed?
What happens to induced magnets when field is removed?
They lose most or all of their magnetism
How to make temporary magnet from magnetic material
How to make temporary magnet from magnetic material
Stroke it with a permanent magnet
Force between permanent and induced magnets
Force between permanent and induced magnets
Always an attraction
Examples of induced magnet materials
Examples of induced magnet materials
Iron, Nickel, Cobalt
What force do permanent magnets always exert?
What force do permanent magnets always exert?
Force on other magnets or magnetic materials
Example of induced magnetisation
Example of induced magnetisation
Iron filings near bar magnets become magnetised