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14 terms

Conestoga Physical Science Chapter 8

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Magnetism
the force of repulsion (pushing) or attraction (pulling) between poles of magnets. Properties and interactions of magnets
Magnetic field
Exerts a force on other magnets and objects made of magnetic materials.
Magnetic pole
Where the magnetic force exerted by the magnet is strongest.
Magnetic domain
Groups of atoms with aligned magnetic poles.
Electromagnet
Temporary magnet made by wrapping a wire coil carrying a current around an iron core.
Solenoid
Single wire wrapped into a cylindrical wire coil.
Galvanometer
A gauge that uses an electromagnet to measure electric current.
Electric motor
Device that changes electrical energy into mechanical energy.
Electromagnetic induction
The generation of a 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 stream.
Direct Current, DC
Flows only in one direction through a wire.
Alternating Current, AC
Reverses the direction of the current in a regular pattern.
Transformer
Device that increases or decreases the voltage of an alternating current.