How do magnets create a magnetic field? How is the magnetic field oriented around a magnet? How does electricity create the magnetic field? How does a magnetic field create electricity? How do scientists detect magnetic fields? How does an electric field produce a magnetic field?
The motion of electrically charged particles found in all matter gives off electric currents that create a magnetic field. These particles become tiny magnets, each with north and south poles. Technically, all matter is subject to the magnetic forces that pervade our universe. Some of these effect...
These magnets are much lower strength compared to the main magnetic field; they may range in strength from 180 gauss to 270 gauss. While the main magnet creates an intense, stable magnetic field around the patient, the gradient magnets create a variable field, which allows different parts of ...
Questions that often come up are, "How do magnets work?", or, "Why is iron magnetic?", or, "What makes a magnet?", or, "What is the magnetic field made of?".Those are good questions, and deserve a good answer. However, did you know that there is a lot about magnets at the ...
What do a wrecking yard, a rock concert and your front door have in common? They each use electromagnets, devices that create a magnetic field through the application of electricity. Wrecking yards employ extremely powerful electromagnets to move heavy pieces of scrap metal or even entire cars fr...
Magnets are objects that produce magnetic fields and attract metals like iron, nickel and cobalt. The magnetic field's lines of force exit the magnet from its north pole and enter its south pole. Permanent or hard magnets create their own magnetic field all the time. Temporary or soft ...
Measuring the strength of magnets1. Hall-Effect DevicesA Hall-effect device is a piece of material which is affected by a magnetic field. By passing a constant amount of current through it in one direction, and by placing it in a magnetic field in another direction, we can measure a ...
Why does a current-carrying wire produce a magnetic field? How does plastic pollution affect plants? How are air currents affected by the Earth's spin? Why do magnets lose their magnetism when heated? How badly has the shifting of magnetic poles affected our magnetosphere?
Larger, stronger magnets can create a field which partially demagnetizes smaller magnets. Some magnet alloys are more susceptible to this. Some grades of Alnico (Aluminum Nickel Cobalt) and Ceramic (Strontium Ferrite) are the most susceptible alloys. Steps to mitigate the impact of external ...
An electromagnet is the same way, except it is temporary — the magnetic field only exists when the electric current flows. You can determine the strength of a magnetic force by adjusting the current flowing through the electromagnet. Superconducting magnets are a type of electromagnet that use th...