A Simple Method to Measure the Local Geomagnetic Field Accurately in a First-Year Physics Laboratory

The directional feature of Earth’s geomagnetic field has been contributing to the technological development and prosperity of humankind since the invention of the magnetic compass navigation centuries ago. Today, for instance, magnetoresistance sensors are commonly used in nanosatellites and unmanned aerial vehicles for high accuracy geomagnetic field-based navigation and mineral survey exploration.