An iron rod and a steel rod are magnetised. The table shows how many identical small pins each supports.
| Rod | With magnetising field present | After magnetising field is removed |
|---|---|---|
| P | 12 | 1 |
| Q | 9 | 8 |
Which conclusion best fits the results?
P is steel; Q is better for a permanent magnetic catch.
P is iron; P is better for a permanent magnetic catch.
P is iron; Q is better for a permanent magnetic catch.
P is steel; P is better for a permanent magnetic catch.
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.