Electromagnetism
(Basic Principles)
, CONTENT/TECHNICAL INFORMATION
In a familiar type of magnet, a wire coil is wound
around an iron core; the strength of the magnetic fie
is determined by the size of the current, such is called
Magnetic Field an electromagnet.
and Induction
,There are magnets
that do not need
current in order to have
a magnetic field, such
are called permanent
magnet.
One end of the magnet
is called a north
pole(red), while the
other end is called
South Pole(blue)
, The magnetic field is defined to emerge from the north pole of
magnet and enter at the South Pole. The designation of poles a
north and south is arbitrary, just as electric charges are arbitrari
called positive and negative.
The force between magnets is similar to the force between
electric charges and can be stated as the fundamental principle
magnetism. “Like magnetic poles repel, while unlike magnetic
poles attract.”
(Basic Principles)
, CONTENT/TECHNICAL INFORMATION
In a familiar type of magnet, a wire coil is wound
around an iron core; the strength of the magnetic fie
is determined by the size of the current, such is called
Magnetic Field an electromagnet.
and Induction
,There are magnets
that do not need
current in order to have
a magnetic field, such
are called permanent
magnet.
One end of the magnet
is called a north
pole(red), while the
other end is called
South Pole(blue)
, The magnetic field is defined to emerge from the north pole of
magnet and enter at the South Pole. The designation of poles a
north and south is arbitrary, just as electric charges are arbitrari
called positive and negative.
The force between magnets is similar to the force between
electric charges and can be stated as the fundamental principle
magnetism. “Like magnetic poles repel, while unlike magnetic
poles attract.”
