Electro magnets Electromagnets are created by running an electrical current through a conductive metal. An electrical current causes the rapid movement of electrons, which creates a magnetic field. Electromagnetic fields can be created by running an electrical current through any metal, including non-fer...
The magnet attracts or pulls the metal to make the door closed. Do you know how? A magnet pulls things made of metals called iron and steel. But it will not pull other things, such as a wooden pencil or a plastic toy, which means it does not attract all. Magnets Have Two Poles (...
The stack of magnets works as one big bar magnet. Do the poles change when you divide the magnet into pieces? Explain how a single magnet can repel the rest of the stack, but still stick to the other surface. Do both sides of the magnet attract the metal How d...
Magnets attract some types of metals, but they can also push other magnets away. So how come you feel only the pull of gravity? In 1915, Albert Einstein figured out the answer when he published his theory of general relativity. The reason gravity pulls you toward the ground is that all ...
The stack of magnets works as one big bar magnet. Do the poles change when you divide the magnet into pieces? Explain how a single magnet can repel the rest of the stack, but still stick to the other surface. Do both sides of the magnet attract the metal Which statement best de...
without also explaining the concept of Rayleigh scattering, he says you can't explain why magnets behave the way they do to a layperson without first explaining the concept of electromagnetic forces to them. And who knows if they'll even understand that?
But when people talk about iron being "magnetic" they usually actually mean "ferromagnetic" (a magnet will attract the item in question). I do not know of any way of 'turning off' the ferromagnetism of an iron object; but obviously you can alloy iron with sufficient other ingredients as ...
http://www.youtube.com/watch?v=naVZDRcI0p4 For those sick and tired of carrying bulky cases around to protect the iPad, Apple have designed a new ‘snap’ on solution that uses magnets to attract a cover to the correct alignment and shield the screen. Removing the cover informs the iPa...
Why do magnets repel each other? Why is motion a keyword for magnetism? How do fundamental forces relate? Which is stronger: magnetism or gravity? Why are diamagnetic substances repelled by magnetic fields? How does Newton's universal law of gravitation work?
Magnets are materials that produce magnetic fields, which attract specific metals. Every magnet has a north and a south pole. Opposite poles attract, while like poles repel. While most magnets are made from metals and metal alloys, scientists have devised ways to create magnets from composite mat...