Relate the gradient of this line to parameters that are held constant. Use this to determine the magnetic field from each magnet. line equation is Y=0.0021x -2E-05. angle is 90 degrees. length is 40mm.

Equation B=F/ILsin(θ)

Figure 5: Current Varying Experiment Data, with Magnetic field. Current I (A) 0 0.5 1 1.5 2 2.5 3 Measured weight (g) 127.825 127.95 128 128.15 128.25 128.35 128.45 Magnet weight (g) 127.825 Effective weight (g) 0 0.125 0.175 0.325 0.425 0.525 0.625 Force F (N) 0 0.0012 0.0017 0.0031 0.0041 0.0052 0.0061 Magnetic field B, (T) 0 0.105 0.0525 0.035 0.0263 0.021 0.0175