A recycling machine uses a permanent magnet to lift steel washers out of mixed waste.
An engineer tests one washer. Each test of attraction uses a small, initially unmagnetised nickel disc.
| Stage of test | Observation |
|---|---|
| Before the washer is placed near the permanent magnet | The washer does not attract the nickel disc. |
| Immediately after the washer is removed from the magnetic field and moved far from the permanent magnet | The washer attracts the nickel disc. |
| Five seconds later | The washer no longer attracts the nickel disc. |
Explain what the observations show about the type of magnet the washer became while it was near the permanent magnet.
80 exam-style questions on AQA GCSE Physics 7.1 Permanent and induced magnetism, magnetic forces and fields, covering 7.1.1 Poles of a magnet and 7.1.2 Magnetic fields. Each one has a worked solution and a mark scheme showing where the marks go.