Magnetism Flashcards
Magnetism refers to…
the properties and interactions of magnets
Magnetic fields are strongest where?
closer to the magnet
what surrounds a magnet?
a magnetic field
magnetic poles are…
areas where the magnetic force exerted is the strongest
true or false: all magnets have a north and south pole
true
magnetic field lines always go…
north to south
why does the north part of a compass point north if like poles repel?
the north pole of earth is actually the south part of the magnetic core of earth. (pg. 427 in book)
what is a compass?
a small bar magnet free to rotate and align with earth’s poles
what are the 3 metals that can become permanent magnets?
Cobalt, Iron, Nickel (CIN)
groups of atoms with aligned magnetic fields are called
magnetic domains
in a magnetic domain, like poles point in…
the same direction
magnets become weaker when…
heated up or dropped a lot
both cause the atoms in the domains to slip out of alignment
you can make a magnet strong again by…
bringing it close to or in contact with a stronger magnetic field
(the stronger magnet re-aligns the domains in the weak magnet)
even permanent magnets can lose their magnetic properties if they are…
heated up
generators turn _______ energy into ________ energy
mechanical, electrical
