magnetic field lines Flashcards
are all magnets surrounded by a magnetic field
yes
what is a magnetic field
a region where a magnetic pole experiences a force acting on it
what are magnetic field lines used to represent (2)
- direction of a magnetic field
- strength of a magnetic field
how is the direction of a magnetic field shown
using arrows
how is the strength of the magnetic field shown
by how close or far apart the lines of the magnetic field are drawn.
- if the magnetic field lines are close together then the magnetic field will be strong
- If they lines are far apart then the magnetic field will be weak
what are the rules that need to be followed when drawing magnetic field lines (3)
- always go from north to south
- magnetic field lines cannot touch, or cross other field lines
- you must always draw arrows pointing south from north
where is the magnetic field strongest at ( in a bar magnet)
at its poles
as the distance from the magnet increases, the magnetic field becomes ____
weaker
2 like poles will
repulse
2 opposite poles will
attract
when opposite poles of two magnets are brought close to each other, they will produce a _____ magnetic field
uniform
all magnets have __ poles, a _____ and a ____
2
north
south
when magnets are held close together, they experience a ____
force
the attraction force or repulsion force between 2 magnetic poles happens due to
the magnetic force
magnetic fields only affect magnets TRUE OR FALSE
FALSE
they also affect magnetic materials
