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Chapter 7

Physical Science Chapter 7

Define Magnetism The properties and interactions of magnets. Page: 202
Define Magnetic Field A region of space that surrounds a magnet and exerts a force on other magnets and objects made of magnetic materials. Page: 203
Define Magnetic Poles The regions of a magnet that exert the strongest force. Page: 204
Define Magnetic Domains Groups of atoms with aligned magnetic poles. Page 207
Define Electromagnetic Force The attractive or repulsive force between electric charges and magnets. Page: 210
Define Electromagnetism The interaction between electric charges and magnets. Page: 210
Define Solenoid A single wire wrapped into a cylindrical wire coil. Page: 210
Define Electromagnet A temporary magnet created when there is a current in a wire coil. Page: 210
What is a Galvanometer? A device that uses and electromagnet to measure electric current. Page: 213
What is an Electric Motor? A device that changes electrical energy into mechanical energy. Page: 213
Define Electromagnetic Induction The generation of an electric current by a changing magnetic field. Page 216
What Does a Generator Do? It uses electromagnetic induction to transform mechanical energy into electrical energy. Page: 217
What is a Turbine? A large wheel that rotates when pushed by water, wind, or steam. Page 218
Define Direct Current (DC) An electric current that is always in one direction through a wire. Page: 220
Define Alternating Current (AC) An electric current that reverses the direction in a regular pattern. Page: 220
What is a Transformer? A transformer is a devise that increases or decreases the voltage of an alternating current. Page: 220
Created by: Avery Thurin