| Word | Meaning |
| Demagnetisation | The process in which the magnetic power of a magnet is gradually destroyed. |
| Elementary or molecular magnet | Each molecule of a magnetic material, which is itself a complete magnet with an N pole and an S pole. |
| N and S poles | The two ends of a magnet where the magnetic pull is strongest. |
| Alternating current | A current whose positive and negative ends keep changing continuously. |
| Solenoid | A coil of insulated wire wound round a cylindrical object. |
| Keeper | The small piece of soft iron laid across the ends of two magnets when they are stored. |