MAGNETS Flashcards
what is a permanent magnet ?
something that produces its own magnetic
field
what is a induced magnet ?
a material that becomes a
magnet when it is placed in a magnetic field / A temporary magnet
where is the strongest part of a magnet ?
The magnetic field is strongest close to
the poles
example of an induce
Paperclips become induced magnets
when they are attached to a magnet
example of a permanent magnet
Bar magnet
what is an electromagnet ?
a magnet that uses an electric current
give an example on how you can increase the strength of an electromagnet
- increasing the number of coils of wire,
- increasing the current in the wire,
- using a magnetic material as a core inside the coil of
wire
give an example of an electromagnet
door bell
which direction does the magnetic field lines go (N-S/S-N)
north to south
electromagnet unit
current / amps
3 contact forces
friction, push fraction, thrust
3 non contact forces
static, gravity, magnetism
attract
go together
repel
go away
