PHY - Magnetism and electromagnetism (not done)

what are the 4 magnetic materials

Iron

steel

colbalt

nickel

what are magnetic materials defined as

magnetic materials are those that are attracted or repelled by a magnet

If all things have electrons what make magnetic materials different

in metals that are magnetic the electrons are pulling in the same direction

what are permanent magnets

for example steel

steel magnets have their domains aligned meaning they constantly pull in the same direction and will pull any magnetic materials towards them

what is induced magnetism

e.g. paperclip

magnetic materials that are not magnets as they do not have their domains permanently aligned

however when brought near a magnet their domains align temporarily meaning they can temporarily act like magnets themselves

describe a method to make a weak magnet (paperclip)

• hold a magnet and use it to pick up a single paperclip

• it should be attracted to either pole of the magnet

• see if you can pick up a second paperclip using the bottom of the first one still attached to the magnet

• their first magnet should act as a weak magnet as the electrons should still be lined up

describe a method to make a weak magnet (iron nail)

bonus draw a diagram for this

• stroke a nail with a magnet in a circular motion

• this should cause the domains of the nail to begin to align

• it should become a weak magnet

draw diagram for this

anything that has an electrical current running through it…

has a magnetic field surrounding it

what is the rule about poles

opposite poles attract

like poles repel