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Chapter 7 Vocabulary
Term | Definition |
---|---|
Magnetism | The properties and interactions of magnets. |
Magnetic Field | A region of space that surrounds a magnet and exerts a force on other magnets and objects made of magnetic materials. |
Magnetic Poles | The regions of a magnet that exert the strongest force. |
Magnetic Domains | Groups of atoms with aligned magnetic poles. |
Electromagnetic Force | The attractive or repulsive force between electric charges and magnets. |
Electromagnetism | The interaction between electric charges and magnets. |
Solenoid | A single wire wrapped into a cylindrical wire coil. |
Electromagnet | A temporary magnet created when there is a current in a wire coil. |
Galvanometer | A device that uses an electromagnet to measure electric current. |
Electric Motor | A device that changes electrical energy into mechanical energy. |
Electromagnetic Induction | The generation of an electric current by a changing magnetic field. |
Generator | Uses electromagnetic induction to transform mechanical energy into electrical energy. |
Turbine | A large wheel that rotates when pushed by water, wind, or steam. |
Direct Current | Electric current that is always in one direction through a wire. |
Alternating Current | Electric current that reverses the direction in a regular pattern. |
Transformer | A device that increases or decreases the voltage of an alternating current. |