Magnets and magnetic fields
Any object that attracts the metal iron.
What is a magnet? PG. 717
A magnetic field.
What surround all moving charged particle? PG. 727
A magnet is moved through a wire coil that is part og a closed electric circuit.
How can a magnetic field produce an electric current? PG. 735
a magnet created by wrapping a current-carrying wire around a ferromagnetic core.
What is an electromagnet? PG. 728
A shaft with a set of blades that spin when a stream of pressurized fluid strikes the blades.
What is a turbine? PG. 738
A place on a magnet where the force it applies is strongest
What is a magnetic pole? PG. 718
The force that happens when a magnet comes near a current carrying wire?
What is PG. 728
The direction changes as the poles of the rotating coil line up with the poles of the magnet.
The current produced by a generator changes what and how? PG. 737
A device that uses an electric current to produce motion.
what is an Electric motor? PG. 730
A devicxe that changes the voltage of an alternating current.
What is a transformer? PG. 739
Elements including iron, nickel, and cobalt, that have an especially strong attraction to magnets.
What is ferromagnetic elements PG. 721
Made by placing a ferromagnetic material, like iron, as a core within the wire coil.
What is an electromagnet? PG.728
Two wire coils wrapped around a single iron core.
What does a transformer consist of? PG. 739
A device that uses a magnetic field to transform mechanical energy to electric energy.
what is an Electric Generator? PG. 736
A force of attraction or repulsion between the poles of two magnets is a magnetic force.
What is a magnetic force? PG. 718
A region in a magnetic material in which the magnetic fields of atoms all point in the same direction.
What is a Magnetic Domain? PG. 722
A coil of wire connected to a rotating shaft, a permanent magnet, and a source of electric energy, such as a battery.
What are the main parts of an electric motor? PG. 730
A transformer's output voltage is less than the input voltage.
What is a step-down transformer? PG. 739
An electric current that flows in one direction.
What is a direct current? PG. 737
Any material that is strongly attractewd to a magnet.
What is a magnetic material? PG. 721
The Earth is surrounded by ____________.
What is a magnetic field?
PG. 720
What are electric motors replacing? PG. 731
The current as it travels from the power plant to homes and businesses.
Transformers control the voltage of what? PG. 740
An electric current that changes direction in a regualr pattern.
What is an alternating Current? PG. 737
A magnet that remains a magnet after being removed from another mangetic field.
What is a permanant magnet? PG. 723