| Question |
Answer |
| alternating current (AC) | An electric current that regularly changes the direction of its flow. |
| Armature | The rotating electromagnet in an electric motor. |
| Curie temperature | The temperature at which a permanent magnet loses its magnetic field. |
| direct current (DC) | An electric current that flows in only one direction. |
| Domains | Microscopic regions of materials that may be lined up to produce a magnetic field of force. |
| electric field | The strengths and directions of the electric force at every point around the electrode are collectively called this. |
| |
| ferromagnetic | Strongly attracted to magnets. |
| Generators | A device that uses magnetic fields to convert mechanical energy into electrical energy. |
| geographic north pole | Point at the “top of the world” where the axis of the Earth spins. |
| hertz (Hz) | The unit of frequency’ one cycle per second. |
| lines of forces | Show the direction the electrical force will move a positive charge. |
| magnetic fields | Fields that show the strength and direction of magnetic forces. |
| paramagnetic | slightly attracted to magnets. |
| Relays | A switch used to turn solenoids on or off. |
| Solenoids | Coiled wires use to form a magnet. |
| step-down transformer | A series of coils that uses induction to produce a lower voltage. |
| step-up transformer | A series of coils that uses induction to produce a higher voltage. |
| super conducting magnets | A magnet made from special materials and kept at extremely low temperatures. |
or...
