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7.7 Mrs Jensen
Magnetism
10
Science
7th Grade
09/14/2011

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Cards

Term
magnetism
Definition
a force that can either attract or repel objects
Term
magnetic field
Definition
the area around a magnet where magnetic forces act and that exists in three dimensions, all around a magnet
Term
compass
Definition
a magnetic needle suspended so that it is free to turn
Term
electromagnetism
Definition
a force with two aspects - electricity and magnetism
Term
electromagnet
Definition
a strong magnet that can be turned on and off and that is created by wrapping a current0carrying wire around an iron core
Term
electric motor
Definition
a device that uses a magnetic field to transform electrical energy into mechanical energy
Term
induction
Definition
a process by which a changing magnetic field causes an electric current in a wire loop
Term
electric generator
Definition
a device that uses a magnetic field to transform electrical energy into mechanical energy
Term
transformer
Definition
a device used to increase or decrease the voltage of an alternating current
Term
magnetic domain
Definition
a group of atoms with their magnetic poles pointing in the same direction
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