A field-line diagram contains a region of curved lines whose spacing decreases from P to Q. A student says the field is uniform because all the arrows point along the lines. Which correction is needed?
The strength stays constant and the direction changes from P to Q.
The strength increases and the direction stays constant from P to Q.
The strength decreases and the direction changes from P to Q.
The strength increases and the direction changes from P to Q.
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.