In 1820, Oersted discovered that such a current exerts a force on a magnet. If we define magnetism to be that field of study related to the phenomenon of a force between two magnets, one can deduce that the electric current is some kind of magnet. To mirror what we did with electric fields, we attempt to calculate the magnetic field due to different types of current-carrying wires. One can then build it up for a finite wire by integration. This is the final question we will have time to explore and the answer is yes.
Magnetic fields can be a source of electricity, or electric fields.