7.1 Permanent and Induced Magnetism, Magnetic Forces and Fields Flashcards
at which part of a magnet are the magnetic forces strongest?
the poles of the magnet.
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?
a repulsive, non-contact force.
what happens when an induced magnet is removed from a magnetic field?
the induced magent loses most/all of its magnetism.
what type of force is exerted if two unlike poles of a magnet are brought near each other?
an attractive, non-contact force.
what type of force does induced magnetism always cause?
a force of attraction.
in what direction does a magnetic field point?
- 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 is the difference between a permanent magnet and an induced magnet?
- a permanent magnet produces its own magnetic field
- an induced magnet becomes magnetic when placed in a magnetic field
what does a magnetic compass contain?
a small bar magnet that points in the direction of the earth’s magnetic field.
what can always be said about the force between a magnet and a magnetic material?
it is always attractive.
what is a magnetic field?
the region surrounding a magnet where another magnet or magnetic material experiences a non-contact force.
how does the strength of a magnetic field alter as you move further away from the magnet producing it?
the magnetic field strength decreases the further you move away.
give four examples of magnetic materials.
- iron
- steel
- cobalt
- nickel
