A compass is used far from magnets and magnetic materials. Its needle is disturbed and then released. It returns to approximately the same direction. Which explanation is correct?
The compass case becomes magnetised by the Earth’s gravitational field.
The compass case becomes magnetised by the Earth’s magnetic field.
The magnetic needle aligns with the Earth’s gravitational field.
The magnetic needle aligns with the Earth’s magnetic field.
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.