Test Chapter 10.2 - 11
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magnetic fields are produced by the
motion of electrons and other charged particles
the most important cause of magnetism in magnetic materials
electron spin
A group of aligned atoms having a single magnetic field
domain
theory that says an object will not possess a single, overall magnetic field unless most of the domains are lined up in the same direction
domain theory
substances with no unpaired electrons
diamagnetic
material weakly attracted to a magnet is said to be
paramagnetic
magnet made from a magnetically soft material is called a
temporary magnet
Materials whose domains strongly resist changes in the direction of their magnetic fields are
magnetically hard
magnets made from magnetically hard materials are called
permanent magnets
the three ways of magnetizing
by contact, by induction, by electricity
a device that produces a strong magnetic field when electricity passes through it
electromagnet
The magnetically soft material placed within the coils of an electromagnet in order to strengthen its field is the electromagnet’s
Core
The temperature at which a ferromagnetic material’s do-mains disappear is its
Curie Point
The resistance of a magnet to being demagnetized by a magnetic field is the material’s
coercivity
The force existing in a magnetic field that causes a moving electric charge to deviate from its original path is called the
Deflecting Force
a navigational device consisting of a magnet free to swing horizontally so that it always points north
Magnetic Compass
Person to discover that a compass points north because it is guided by Earth’s magnetic field
William Gilbert
book published by William gilbert
De Magnete