p4.1 - magnetism Flashcards
at which part of a magnet are the magnetic forces strongest?
the poles
what happens when two magnets are brought close to each other
they exert a force on each other
what type of force is exerted if two like poles of a magnet are brought near each other
repulsive, non-contact force
what type of force is exerted if two unlike poles of a magnet are brought near each other
attractive, non-contact force
define a permanent magnet
a material that produces its own magnetic field
what is an induced magnet
an induced magnet becomes magnetic when placed in a magnetic field
what type of force does induced magnetism always cause
force of attraction
what happens when an induced magnet is removed from a magnetic field
magnet loses most/all of its magnetism
what is a magnetic field
region surrounding a magnet where another magnet or magnetic material experiences a non-contact force
give 4 examples of magnetic materials
iron steel nickel cobalt
what can always be said about the force between a magnet and a magnetic material
it is always attractive
how does the strength of a magnetic field alter as you move further away from the magnet producing it
magnetic field strength decreases the further you move away
describe the two ways that the direction of a magnetic field points
-in the direction that a north pole would experience a force if placed in the field
-from the north seeking pole to the south seeking pole of a magnet
what does a magnetic compass contain
a small bar magnet that points in the direction of the earth’s magnetic field
what is produced when current flows through a conducting wire
a magnetic field is produced around the wire
