A researcher is using a magnetic field sensor to investigate the magnetic field strength at a point in the empty space surrounding a long, straight conductor carrying a stable electric current.
State one physical parameter, other than the current, that can be altered to change the magnitude of the magnetic field strength measured by the sensor.
30 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.