14May2014

Calculating the Magnetic Field of Earth

The magnetic field of the earth was experimentally determined in the classroom but apply a current to a coils and using the coils magnetic field. B(coil)=ulN/2R=B(earth)tan(theta). For B(coil) was determined Biot-Savart Law and a graph of the B(coil) vs tan(theta) created a slope that represents B(earth). The angle made when the current was applied was used to calculate tan(theta).

This is the  experimental set up. 

Here we can see from a few points that the magnetic field of the earth is 2.83*10^-5 T.