Measuring earth's magnetic field from deflection of a compass needle (without hall probe)

This experiment aims to find the horizontal component of earth’s magnetic field. The experiment involves the investigation of the combined effect of the magnetic fields produced by the earth and a current carrying multi-turn coil. With the help of graphs, students are expected to study the relation of current through the coil and the magnetic field that it generates measured by the deflection of a compass needle. Further, students will also learn how to linearize data and perform weighted fit of a straight line.