Vocabulary
a non-metallic electric conductor in which current is carried by the movement of ions.
electrolyte
a body having the property of attracting iron and producing a magnetic field external to itself
magnet
What do all magnets have in common?
North and south pole
What do electrical currents always produce?
magnetic field
Name two items we use everyday that use electromagnets.
door latches
doorbells
metal detectors
car fuel gauges
vending machines
an elementary particle consisting of a charge of negative electricity
electron
an elementary particle that is identical with the nucleus of the hydrogen atom, carries a positive charge
proton
what causes a piece of steel to magnetize?
when you strike it with a magnet
all domains align in the same direction
What is electromagnetic induction
electricity is produced in a wire as it moves in a magnetic field
What does an electric motor do and how does it work>
turns electricity into movement
magnetic field produced in a wire coil interacts with a permanent magnet causing the coil to turn. The current is reversed every 1/2 turn
the portion of space near a magnetic body or a current- carrying body in which the magnetic forces due to the body or current can be detected
magnetic field
the mechanical force exerted by a magnetic field upon a magnetic pole placed in it
What can happen when you hit a steel magnet with a hammer?
the domains will shake up and the steel will lose its magnetism
Give two examples of magnetic materials
iron nickel cobalt
How do generators differ from motors?
generators turn movement into electricity
an uncharged elementary particle that has a mass nearly equal to that of the proton
nuetron
a magnet that can be switched off and on with electric current
electromagnet
What are the benefits of using electromagnets over permanent magnets?
they can be turned off and on
you can alter the strength by changing the current
What is ferromagnetic material
strong magnetic properties
For a material to be magnetic, what must happen
domains must align
either of two comparable regions on a celestial body and either of the poles of a magnet
magnetic pole
The force produced when an electrical current flows through a wire; it forms a magnetic field
electromagnetic force
What happens when you break a magnet
becomes two magnets- both with a n and s pole
What happens when electricity flows through a coil of wires?
the magnetic field combines to produce a magnetic field similar to a bar magnet
Explain electron spin
moving electrons make a magnetic field- electrons usually pair- cancelling out- weak
don't pair strong