We’re all familiar with the fact that a magnet has a north pole and a south pole, and that any magnet will exert a force on another magnet.  In this video, we’ll look in more detail at how two magnets can interact with one another, the difference between permanent and induced magnets, and how a simple compass allows us to find our bearings.  We’ll then go on to look at the magnetic field that is created when an electric current flows through a straight piece of wire or a solenoid (coil of wire).

Key Words

magnet, magnetism, pole, north pole, south pole, magnetic force, permanent magnet, induced magnet attract, magnetic field line, compass, plotting compass, lines of magnetic flux, magnetic flux lines, solenoid, repel, right-hand grip rule, non-contact force