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.

Reader Jayant Bhalerao, a college physics instructor, found the story useful in class: “We will share it with our students, so that they can appreciate how ...

Magnets are also surrounded by a similar three-dimensional field ... the lines of magnetic force surrounding the magnet. The simplest generator consists of just a coil of wire and a bar magnet.

Many people will remember experiments in school with iron filings and bar magnets to ... the details of the magnetic field. Just as they are on Earth, magnetic field lines are of crucial ...

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 ...

If these metals have not been turned into a permanent magnet they will still be attracted to a magnet if placed within a magnetic field ... Magnetic fields lines are invisible but they fill ...