Any material that attracts iron or materials containing iron
Magnet
100
The interaction between electricity and magnetism
electromagnetism
100
The process of creating a current in a circuit by changing a magnetic field
electromagnetic induction
100
What is electromagnetic induction?
Making an electric current by changing an magnetic field.
100
What are some ways we use electromagnets every day?
Doorbells, motors, galvanometers
200
one of two points, such as the ends of a magnet, that have opposing magnetic qualities
Magnetic Pole
200
a coil of wire with an electric current in it
Solenoid
200
A device that converts mechanical energy into electrical energy
electric generator
200
Which side of a transformer has the higher voltage?
The side that has the most loops.
200
What is a galvanometer?
A device that measures current.
300
the force of attraction or repulsion generated by moving or spinning electric charges
Magnetic Force
300
a coil that has a soft iron core and that acts as a magnet when an electric current is in the coil
electromagnet
300
A device that increases or decreases the voltage of alternating current
transformer
300
How many poles do magnets have?
Two
300
What are the three properties of magnets?
- Two poles (north and south)
- Magnetic force (same=repel, opposites=attract)
- Magnetic field (the region around a magnet in which magnetic forces can act)
400
Name two of the four kinds of magnets.
Magnets can be classified as ferromagnets, electromagnets, temporary magnets,
and permanent magnets.
400
A device that converts electrical energy into mechanical energy
electric motor
400
A step-up transformer ________ the voltage of an alternating current.
increases
400
An electromagnet is made up of a _______ wrapped around an iron core
solenoid
400
These lines map out the magnetic field.
Magnetic field lines
500
These are most commonly seen near Earth’s magnetic poles because Earth’s magnetic field bends inward at the poles.
Auroras
500
Who discovered that a wire carrying a current makes a magnetic field?
Oersted
500
A step-down transformer ________ the voltage of an alternating current.
decreases
500
How can you make an electromagnet even stronger?
Increase the number of loops in the solenoid.
500
The closer together the magnetic field lines are, the _______ the magnetic field is.