Chapter 7 Vocabulary – Magnetism
magnetism- refers to the properties and interactions of magnets
magnetic field – is a region of space that surrounds a magnet and exerts a force on other
magnets and objects made of magnetic materials
magnetic pole -The regions where the magnet exerts the strongest force. All magnets
have a north and a south pole.
magnetic domain - The groups of atoms with aligned magnetic poles
electromagnetic force -the attractive or repulsive force between electric charges and
magnets
electromagnetism - The interactions between electric charges and magnets
solenoid - A single wire wrapped into a cylindrical wire
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 - Is a large wheel that rotates when pushed by water, wind, or steam
Direct Current – (DC) Electric current that is always in 1 direction through a wire
Alternating Current - (AC) Electric current that reverses the direction in a regular
pattern.
Transformer – A device that increases or decreases the voltage of an alternating current