A steel washer is suspended from a thread. A student slowly moves a permanent magnet towards the washer.
Which observation would provide evidence that the magnetic force is a non-contact force?
The washer stays attached when the magnet lifts it upwards.
The magnet remains magnetic after the washer is moved away.
The washer begins to move only after the magnet touches it.
The washer begins to swing towards the magnet while a gap remains.
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.