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Magnetic Energy

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by

Hannah Le

on 2 April 2013

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Transcript of Magnetic Energy

Where do magnets come from? - Some magnets are natural like lodestone and magnetite.
- Some magnets are man-made.
-Magnets that are made in the laboratory have a mixture of iron, nickel, cobalt and other elements. They can also be a mixture of iron, boron and neodymium. What is a magnet? - A piece of metal that has the ability to attract nickel, iron, cobalt and other certain types of metal. It also repels or attract other magnets.
- It can produce a magnetic field. Magnetic fields are invisible but serve a magnet's notable property: a force that pulls in ferromagnetic materials in other words metals that are attracted to magnets or form permanent magnets.
- There are two types of magnets; permanent magnets and electromagnets.
- Electromagnets are made from wrapping a copper wire around iron and running electricity through it. The magnetic field disappears when the current is turned off.
- A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. What does a magnet do? - Scientists use four basic ways to categorize magnets, based on how their magnetic force is used;
- Category 1: A magnet's attraction and repelling force.
- Category 2: The ability to convert electrical energy to mechanical energy.
- Category 3: The ability to convert electrical energy to mechanical energy.
- Category 4: The magnet’s ability to affect ion beams. How do we use magnets in our daily life - We use refrigerator magnets every time we want to stick something on the refrigerator
- Motors use batteries to help make it move.
- Windmills move by wind and making the copper wire coil rub against a magnet causing electrical charges
- Watermills turn by the water turning and just like windmills rubs the copper coil against a magnet causing electrical charges.
- An electrical toothbrush uses batteries to make the brush move
- Inside generators are two permanent magnets that are facing each other's poles and the repelling force makes the fan move.
- Magnets are also in electric bells. MAGNETIC ENERGY Table of contents ~ what is a magnet?
~ Where does it come from?
~ What does a magnet do?
~ How do we use magnets in our daily life? Hope you enjoyed my presentation!!!!! :) By: Hannah Le
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