or the magnetic field of a magnet. place the plotting compass near the magnet on a piece of paper mark the direction the compass needle points move the plotting compass to many different positions ...

Now, though, a controversial new paper warns that falling space junk could actually weaken Earth’s magnetic field. If that happens, the author of the paper argues that we could see atmospheric ...

How a Generator Works When an electric current flows through a wire, it generates a three-dimensional magnetic force field around the ... sprinkled on a sheet of paper placed over the magnet.