Magnets
What is the attracting and repelling of magnets called?
Magnetism.
What is the area of magnetic force around a magnet called?
Magnetic field.
Why does a compass always point north?
Because the Earth acts like a giant magnet.
What do electric currents produce?
Magnetic fields.
What is a solenoid with a ferromagnetic core called?
Electromagnet.
What is the attracting and repulsion between magnetic poles called? How is it produced?
Magnetic force. It is produced when magnetic poles interact.
Magnetic field lines always leave the north/south pole and enter the north/south pole.
Magnetic field lines always leave the north pole and enter the south pole.
Magnetic pole do/do not stay in one place.
Magnetic poles do not stay in one place.
What is the relationship between electricity and magnetism called?
Are Electromagnets used in everyday life?
Yes, some examples are electric motors, earphones, and even to lift old cars in junkyards.
Magnetic poles that are unlike/alike attract each other, and magnetic poles that are unlike/alike repeal each other.
Magnetic poles that are unlike attract each other, and magnetic poles that are alike repeal each other.
Magnetic field lines are lines that map out the invisible magnetic field around an object. How do they go from one pole to another?
They leave the north pole, curve around the magnet, and enter the south pole.
The Earth has it's geographic poles, but it also has it's magnetic poles, which are located on the surface of the Earth where the magnetic force is the strongest/weakest.
The Earth has it's geographic poles, but it also has it's magnetic poles, which are located on the surface of the Earth where the magnetic force is the strongest.
Does adding loops to a wire strengthen the magnetic field?
How is an electromagnet turned on and off?
By turning on and off the current.
Where is the magnetic effect of a magnet is strongest?
At the poles.
When two magnetic fields of two or more magnets overlap, what is the result?
The result is a Combined Field.
The outer core of the Earth is made up of hot swirling liquid Iron. Does the swirling of the liquid Iron cause the Earth to have a magnetic field.
Yes.
What shape does the magnetic field form around the wire?
A circle.
The overall magnetic field of an electromagnet is much stronger/weaker than that of a solenoid.
The overall magnetic field of an electromagnet is much stronger than that of a solenoid.
What rock attracts materials containing Iron and attract and repeals other magnetic rocks?
Magnetite.
In combined fields the unlike poles attract each other, forming a stronger/weaker field between the magnets.
In combined fields the unlike poles attract each other, forming a stronger field between the magnets.
what is the angle of the geographic north pole to the magnetic north pole called?
Magnetic Declination.
who discovered that electric currents produce magnetic fields? And when?
Danish scientist Hans Christian Oersted. In the 1820s.
True or false: The current in the wire and the magnetized core produce the magnetic field of an electromagnet.
True.