Magnets 1
Like charges ______
Repel
An _____ is a magnet that consists of a solenoid wrapped around an iron core.
Any material that attracts iron or materials containing iron is called a ______.
magnet
A material in which charges cannot move freely.
Electrical insulator
Opposite Charges ________
Attract
True
True or false: Like charges attract
False
A material in which charges can move freely
Electrical conductor
A _________ is the invisible region (area) around a magnet in which magnetic forces can act.
Magnetic Fields
What is the main difference between a permanent magnet and an electromagnet?
An electromagnet can be turned on and off
The parts of a magnet where the magnetic effects are the strongest are called.
Poles
The ability to cause change
Energy
_____ is the interaction between electricity and magnetism.
Electromagnetism
What main material do magnets attract?
Iron
True or False: If you split a magnet in half you would have a magnet with a south and north pole.
True
A push or pull
A ____ is a coil of wire that produces a magnetic field when carrying an electric current.
Solenoid
What is the best evidence that Earth has its own magnetic field?
A compass pointing to the north pole
The force of repulsion or attraction between the poles of magnets is called ______.
Magnetic force
How can you increase the magnetic force in an electromagnet?