Magnets
The properties and interactions of magnets.
What is magnetism?
A device that increases or decreases the voltage of an alternating current.
What is a transformer?
What does increasing the number of coils around the core of an electromagnet do?
What is an increase the strength of the magnetic field?
A type of magnet is created from an electromagnet.
What is a temporary magnetic?
The generation of a current by a changing magnetic field.
What is electromagnetic induction?
The regions where the magnetic forces exerted by the magnet is strongest.
What are the poles?
In a step-up transformer, which coil has the greater number of turns?
What is the secondary coil?
There is no magnetic field.
What is no electric current flowing through the wire?
A single wire wrapped into a cylindrical wire coil.
What is a solenoid?
This uses electromagnetic induction to transform mechanical energy into electrical energy.
What is a generator?
The term for the alignment of atoms in a magnet.
What is a magnetic domain?
The electrical energy that is transmitted through a transformer is changed. True or False
What is false?
The amount of current in the wire.
What determines the strength of a magnetic field?
A temporary magnet made by wrapping a wire coil carrying a current around an iron core.
What is an electromagnet?
A large wheel that rotates when pushed by water, wind, or steam.
What is a turbine?
This surrounds a magnet and exerts a force on other magnets and objects made of magnetic materials.
What is a magnetic field?
In a step-up transformer, which voltage (input or output) is greater?
What is output?
A device that uses an electromagnet to measure electric current.
What is a galvanometer?
The man who found that electricity and magnetism are related.
Who is Hans Christian Oersted?
The difference between direct and alternating currents.
What is direct flows in only one direction, while alternating reverses the direction of the current in a regular pattern?
How many poles does a magnet have?
What is two; one is north and the other is south?
The type of transformer that brings the power into your house?
What is a step-down transformer?
Makes a magnetic field.
What is an electric current is flowing through a wire?
Two ways that can increase the strength of an electromagnet.
What is increase the number of turns of wire to the solenoid AND increase the current passing through the wire?
Describe the transformation of energy in an electric motor?
What is changes electrical to mechanical energy?