electromagnetism
what do you use to make an electromagnet?
you use a nail, coil, and a battery.
what is a magnet that is magnetic without a magnetic field?
a. permanent magnets
b.temporary magnets
c.electromagnets
permanent magnet
what does an electromagnet use to charge itself?
It uses its battery core
what are the two ends on a magnet called?
a.north and south?
b.east and west
north and south
what is the difference between a permanent magnet and a temporary magnet?
temporary magnets lose their magnetism after the thing magnetizing them is stopped, while permanent magnets always stay magnetized.
is a electromagnet a...
a.permanent magnet
b.temporary magnet
temporary magnet
what is the difference between and electromagnet and a permanent magnet?
electromagnets require coil and a core to function, whilst permanent magnets are permanently magnetized.
where does electricity flow from?
an insulated wire wrapped around a piece of iron
what can show the magnetic field?
a.iron fillings
b.water
c.another type of magnet.
b.electric current
iron fillings
what is a temporary magnet that is made of soft metals that are magnetised only when exposed to a permanent magnetic field
a. temporary magnet
b.permanent magnet
c.electromagnets
temporary magnet
how do you increase the strength of an electromagnet?
you wrap the coil around the nail more than you would
what is a magnetic field?
A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials
what is a magnet that has a soft metal core made into a magnet by the passage of electric current through a coil surrounding it
a.temporary magnet.
b.permanent magnet.
c.electromagnets
electromagnets