Magnets
Isabella Creeley
Magnets are pieces of iron or steel that possesses the property of attracting certain substances, as iron.
Electromagnet are made of soft metal core made into a magnet by the passage of electric current through a coil surrounding it.
Magnetism is a physical phenomenon produced by the motion of electric charge.
A permanent magnet retains its magnetic properties for a long time. A temporary magnet acts as a magnet only as long as it is in the magnetic field produced by a permanent magnet or an electric current.
Superconductors are substances capable of becoming superconducting at sufficiently low
temperatures.Magnets were discovered by a Cretan shepherd named Magnes.
- Mercury has a magnetic field.
- Earth has a magnetic field.
- Jupiter has a magnetic field.
- Saturn has a magnetic field.
- Uranus has a magnetic field.
- Neptune has a magnetic field.
- The Sun has a magnetic field.
North poles point north, south poles point south.
Magnetic forces attract only magnetic materials.
- Magnetic forces act at a distance.
- While magnetized, temporary magnets act like permanent magnets.
Magnets can make life easier because they are used in modern equipment such as motors in cars and in speakers.