Magnetic fields lines are invisible but they fill the space around a magnet where the magnetic forces work on magnetic materials, and where they can attract or repel other magnets. Although we ...

It has an invisible magnetic field. Only certain materials, such as iron, feel a magnetic force. Permanent magnets can come in lots of different shapes and sizes. Bar magnets and horseshoe magnets ...

The magnetic field lines of a bar ... magnet on top of the paper in view of the document camera or overhead projector. Place the Plexiglas platform on top. If using the iron filings, remove paper ...