This is not necessarily a homework problem, but it is a lab for physics with which I am struggling. For the lab, I took an 18 turn coil and charged it with various currents. We put a probe at the center of the coil and measured (using Data Studio) the magnetic field. The magnetic field was given in Gauss by Data Studio which I calculated to Tessla (1 Gauss = 1 *10^-4 Tessla). We measured the magnetic field from 0A to 3A increasing in .5A increments. At .5A, the magnetic field was 1 * 10 ^-4 , then at 1A the magnetic field was 3*10^-4. From there the magnetic field increased by 1*10^-4 with each increment. Later I graphed this and to no surprise, it was not linear. I'm not sure why this happened though, any ideas? I know the graph should be linear.