| A | B |
|---|
| poles | the ends of a magnet |
| induced magnetism | magnetism caused by touching or being near a magnet |
| magnetize | make into a magnet |
| magnetic field | the pattern of magnetism around a magnet |
| lines of force | the lines that show a magnetic field |
| coil | a wire wound up in many loops |
| turn | one loop in a coil of wire |
| electromagnet | a coil of wire that uses electricity to make magnetism |
| core | the material in the center of an electromagnet |
| galvanometer | a tool for measuring very small electric currents |
| induced current | an electric current made by a moving magnetic field |
| primary coil | a coil that induces a current in another coil |
| secondary coil | a coil in which current is induced |
| induction coil | a primary and secondary coil working together |
| direct current | electric current that moves in one direction only |
| alternating current | electric current that keeps moving back and forth |
| transformer | an induction coil that uses alternating current |
