Magnets
By:Andrew Greene
What Are Magnets
Magnets are a piece of iron (or an ore, alloy, or other material) that has its component atoms so ordered that the material exhibits properties of magnetism, such as attracting other iron-containing objects or aligning itself in an external magnetic field.
Who discovered magnets?
The legend is that a shepard was walking and he had a nail on his shoe and he steped on rock and it stuck firmly to the rock.
Five uses of magnets are...
- They are used to construct the electrical motors and the generators which convert the electrical energy into mechanical energy and vice verse.
- They are also used in the speakers to convert the electrical energy into sound energy.
- They are used in the electrical bells.
- They are used in the Maglev trains the super conductor magnets makes the train role easier.
- They are also used in scrap yards to take metal up in big amounts
Five planets with magnetic fields...
- Mercury
- Jupiter
- Saturn
- Uranus
- Neptune
4 facts about magnets...
1. North poles point north, south poles point south.
2. Like poles repel, unlike poles attract.
3. Magnetic forces attract only magnetic materials.
4. Magnetic forces act at a distance.
Electomagnets
A soft metal core made into a magnet by the passage of electric current through a coil surrounding it.
Superconductors
A superconductor is a material that can conduct electricity or transport electrons from one atom to another with no resistance.
repel and attract
To repel something is to keep it away. To attract something is to draw it towards oneself.
Temporary and permanent magnets
A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field.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
Magnetism
a physical phenomenon produced by the motion of electric charge, resulting in attractive and repulsive forces between objects.