Transcript Magnetic Poles and Fields

FYI
Vocabulary Quiz- Friday
No after school tutorials…THURS or FRI
(sorry!)
Vocabulary Review-Magnetism
Magnetic domain
 A microscopic cluster
of atoms with their
magnetic fields
aligned
Faraday’s Law
 Induced voltage in a
coil is proportional to
the product of the
number of loops and
the rate at which the
magnetic field changes
within those loops
Magnetic Field
 A force field that fills
the space around every
magnet or current
carrying wire
Electromagnetic Induction
 The phenomenon of
inducing a voltage in a
conductor by changing
the magnetic field
near the conductor
How can you ruin a magnet?
Drop it
2) Heat it
3) Store it improperly
1)
Magnetic Poles
If you suspend a bar magnet from its
center it will act as a c________
North and South Poles- all magnets
have them
 The end that points north
(means north seeking) and is
called the north pole
 The end that points south
(means south seeking) is
called the south pole
Does it make sense that the north
pole of a magnet can be attracted
to the north pole of the earth?
A north magnetic pole never exists
without a south pole
=
Magnetic Fields
The space around a magnet is where
the magnetic force is exerted
 The field lines are always
drawn from N______ to
S_________
 North to South
Draw the magnetic lines of force
around the bar magnet
How can you determine where the
strength on a magnet is stronger?
 The lines will be closer together where they are
stronger