How do Magnets work?

The north pole of one magnet attracts the south pole of another magnet, while the north pole of one magnet repels the other magnet's North Pole. A magnet creates an invisible area of magnetism all around it called a magnetic field. Every magnet has both a North and a South Pole. When you place the North Pole of one magnet near the South Pole of another magnet, they are attracted to one another. When you place like poles of two magnets near each other they will repel each other. "Like poles repel, unlike poles attract".

Magnets don't mind the cold, some magnets perform better when the temperature drops. That's because the atoms that comprise magnets vibrate more slowly and less randomly when cold. The result is a better alignment of the atoms that generates the magnetic field, boosting its strength. It is also possible for a permanent magnet to lose its magnetism. It happens by demagnetizing magnetic field: permanent magnets exhibit a characteristic called co-ercivity, which is the ability of a material to withstand being demagnetized by an applied magnetic field.

If the two poles are the same, the two magnets will push away, or repel, from each other. This is called magnetism. Magnets can make some other metals into magnets when they are rubbed together. A magnet's magnetism decreases when it is heated and increases when it is cooled. If you can find a very strong magnet, repeatedly rub it across your weakened magnet. Magnet stacking is one way to make weak magnets stronger is by stacking more of them together.

Comments

How Electric Current is formed?

How Electric Current is formed? Have you ever wondered how Electric Current is formed? Generally, the flow from one point to another through a medium is called a current. When an electric charge moves from one point to another inside a conductor or a semiconductor, it is actually conducting electric current. Electric charge carriers are micro particles that conduct the electricity. They can be protons, electrons, holes or ions depending on their availability in the conducting material. Normally electrons and holes are responsible for conducting electricity. This process occurs when a Voltage or a Potential Difference is applied at the two ends of a conductor or a semiconductor. Thus Electric Current is formed when a Voltage of Potential Difference is applied at the two ends of a conductor or semiconductor, i.e. when a closed circuit is formed.

Evolution of Aircrafts

Since that fateful day in December of 1903, airplane design has changed dramatically. The Wright Brothers built a biplane with two propellers that were chain-driven by a gasoline motor. Our dependence on air travel over the years has forced airplane design to catch up with the times. On December 17, 1903, Wilbur and Orville Wright made four brief flights at Kitty Hawk with their first powered aircraft. The Wright brothers had invented the first successful airplane. The Wrights used this stopwatch to time the Kitty Hawk flights. Aircrafts have evolved so much from the initial days. From 2 seater to the latest air bus type, they have come a long way. The history of aviation extends for more than two thousand years, from the earliest forms of aviation such as kites and attempts at tower jumping to supersonic and hyper-sonic flight by powered, heavier-than-air jets. Kite flying in China dates back to several hundred years BC and slowly spread around the world. Sir George Cayley...

fly2school

Search This Blog