and where they can attract or repel other magnets. Although we cannot see magnetic field lines, we can detect them using iron filings. The tiny pieces of iron line up in a magnetic field.

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Bar magnets and horseshoe magnets are two of the most common shapes of magnet. The magnetic field is shown by lines with arrows that point from north to south. You can tell how old some coins are ...

Magnetic Field Lines: Magnetic field ... wire is similar to that of a bar magnet. When an electric current flows through the loop, it generates a magnetic field. Inside the loop, the magnetic ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Imagine a bar magnet inside Earth, more or less aligned with the axis, where the ends of ...

Bigger magnets aren't always "stronger". But how do you make a comparison between different magnets? One way is to determine the magnetic dipole moment of the magnet. Maybe you aren't quite sure ...

for example in quality assurance during the manufacture of magnets. Fraunhofer scientists have developed a high-resolution magnetic line camera to measure magnetic fields in real time. Field lines ...

Electric currents inside the sun ... the polarity of the field flips, during a time of maximum sunspot activity. The sun's magnetic field has two poles, like a bar magnet. The poles flip at ...

Spin polarisation is the key A team led by Dr. Nikolay Kardjilov and Dr. Ingo Manke at the HZB has now developed a new method for measuring the magnetic field lines inside massive, thick samples ...

Ferromagnetism, the kind displayed by metals including iron, cobalt and nickel, has its origin at the atomic level. In general, a magnetic field exists in the presence of an electric current.

a skinny dipole magnet. The team turned on a magnetic field and put the whole apparatus inside, using liquid nitrogen to cool the sphere and maintain the superconductivity of the metal alloy.

but it's still close enough to the planet that the magnetic field is neat and orderly, more like a bar magnet. Farther out in the tail, the lines of Earth's magnetic field have been stretched and ...