Summary
Making magnets involves creating temporary magnets using either the stroking method or the electrical method.
- Temporary Magnet — a magnet that retains its magnetism for a short period. Example: Iron nail magnetized by stroking.
- Stroking Method — a method of making a magnet by stroking an iron object with a permanent magnet. Example: Stroking an iron nail in one direction until it attracts small magnetic items.
- Electrical Method — a method of making a magnet using electricity, creating an electromagnet. Example: Coiling wire around an iron nail and connecting it to a battery to create an electromagnet.
- Electromagnet — a type of temporary magnet that is created by electricity and loses its magnetism when the electric current is removed. Example: Iron nail wrapped with wire and connected to a battery.
Exam Tips
Key Definitions to Remember
- Temporary Magnet: A magnet that retains its magnetism temporarily.
- Stroking Method: Making a magnet by stroking an iron object with a permanent magnet.
- Electrical Method: Making a magnet using electricity to create an electromagnet.
- Electromagnet: A temporary magnet created by electricity.
Common Confusions
- Confusing permanent magnets with temporary magnets.
- Believing that electromagnets remain magnetic without electricity.
Typical Exam Questions
- How can you make an iron nail into a magnet using the stroking method? Stroke the iron nail with a permanent magnet in one direction several times.
- What happens to an electromagnet when the battery is removed? It loses its magnetism and is no longer an electromagnet.
- How can you make an electromagnet stronger? Coil the wire more times or add more batteries.
What Examiners Usually Test
- Understanding of the stroking and electrical methods to make magnets.
- Differences between temporary and permanent magnets.
- How to strengthen an electromagnet.