Magnetism Flashcards
What is a magnet
Magnets are made of ferromagnetic materials like iron steel nickel and cobalt
Magents have two poles
North and South that exist at the ends of the magnets
Two north/south poles
Repell eachother
A north and south pole
Attract eachother
As magents move further away fromeach other
The force of attraction/repulsion between them gets weaker. This implies that the force is iversely proportionate to the distance between the poles
A ferromagnetic material is
material that contains iron, nickle, cobalts and can be magnetized
Stroking method
single/double touch
temporary magnets
can be easily magnetized and just as easily demagnetized, materials such as iron etc. are temporary magnets
Magnetic fields
A region or area around a magnet in which a force is felt due to the magnet. It can be represented by a series of lines with arrows indicating direction. Mag. fields always leave the north pole and enter the south pole. The number of field lines per unit area indicates the strength of the magnetic field, the closer they are, the stronger the field
due to a single bar magnet
non uniform, symmetrical
two bar magnets unlike poles facing
Non uniform symmetrical
Two bar magents like poles facing
N- symmetrical, non uniform
S- the repulsion test is the only true test to test if something is a magnet
an electric current
Has a magnetic field
Current going out of the plane
up/anticlockwise
current goin into the plane
Down/ clockwise
