A student investigates how the force of attraction between a magnet and a small steel block depends on the distance between them.
The Table shows the results.
Table
| Distance between magnet and block in cm\text{cm}cm | Force of attraction in N\text{N}N |
|---|---|
| 1.0 | 0.48 |
| 2.0 | 0.20 |
| 3.0 | 0.095 |
| 4.0 | 0.052 |
| 5.0 | 0.030 |
Describe the relationship between the distance and the force of attraction.
Explain the results.
Use the idea of magnetic field lines in your answer.
The student says:
'When the distance doubles, the force of attraction halves.'
Evaluate the student's statement.
Use data from the Table.
The steel block is not a magnet.
Explain why the steel block is attracted to the magnet.
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.