Magnetic materials can be used to make permanent magnets or temporary magnets.
The Table shows two uses of magnetic materials.
Table
| Use | Material used | Type of magnet needed |
|---|---|---|
| needle of a compass | steel | |
| core of an electromagnet in a scrapyard crane | iron |
Complete the Table by writing permanent or temporary in each empty box.
Explain why steel is used to make the compass needle.
An unmagnetised iron nail is placed close to one end of a bar magnet.
The nail becomes an induced magnet.
Give two differences between an induced magnet and a permanent magnet.
The unmagnetised iron nail is attracted to both ends of the bar magnet.
Explain why.
70 exam-style questions on Edexcel GCSE Physics 12.1 Magnets and magnetic fields, covering 12.1.1 Magnetic poles, 12.1.2 Magnetic materials; permanent and induced magnets, 12.1.3 Magnetic fields, and 12.1.4 Plotting compasses and the Earth's magnetic field. Each one has a worked solution and a mark scheme showing where the marks go.