permanent + induced magnets

how do magnetic field lines always go from?

north to south

how does the strength of the magnetic field correlate to the closeness of the lines?

closer lines = stronger magnetic field

where is the magnetic field strongest?

poles

what happens when two poles of magnets are put near each other?

• exert a force on each other

  • force is attractive or repulsive

what are permanent magnets?

• produce their own magnetic field

• magnetic field cannot be turned on and off

• attract or repel another permanent magnet

• attract a magnetic material (but not repel it)

what are examples of permanent magnets?

• bar magnets

• horseshoe magnets

what are induced magnets?

• turn into a magnet when put into a magnetic field

• only attracted by other magnets

what are examples of induced magnets?

iron filings

how can you tell if a magnet is permanent or induced?

permanent = can it repel another magnet