Summary 7.1 - Permanent & Induced Magnets

, Magnetism
The Law of Magnetism

Poles of magnets : Two like poles repel each other

South (Blue) Two opposite poles attract each other
·
North (Red) The attraction or repulsion is an example of a non-contact force


ATTRACT REPE


S N 74 S N
↳ i

&
Permanent + Induced Magnets


Very few metals in the Periodic Table are
·
iron
·
Cobalt Steel is also magnetic as it ison
·
Nickel


To test if a material is a magnet it , should b
·
If attracted and not repelled its a magne
·
If repelled the material itself is a magnet


Two types of magnets :
·
Permanent

induced



Permanent Magnets :
·
Made out of permanent magnetic materials , ex . Steel
·
Produces its own magnetic field doesn't
, lose its magnetism


Induced Magnets :
· Once a magnetic material is placed in a magnetic field ,
the material is temporarily a magnet
·
One side becomes South and one North based on the closest magnet's pole




The Earth's Magnetic Field
A magnetic compass will always point North .




The Earth's core is magnetic and creates its own magnetic field