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Lab Report

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Aim The aim of this experiment is to investigate the effects of the angle between the conductor and the magnetic field on the magnetic force.

Variables There are many variables in this experiment. The independent variable in this experiment is the angle between the conductor and the magnetic field, θ. The dependent variable in this experiment is the magnetic force, N (the reading of the electronic weighing balance, g). The variable that we must keep constant in this experiment is strength of magnetic field, B, the current passing through the conductor, I, length of the conductor, l.

Data processing
The equation of the force produced by the electromagnet is,
F=BIlsinθ
When the electromagnet is placed near to the permanent magnet, they will experience magnetic force according to Newton’s 3rd law of motion.
F=mg
F=BIlsinθ=mg
Presentation
The hypothesis of the experiment stated that the magnetic force is directly proportional to the sine of the angle. y=mx+c mg=BIl(sinθ)+0

Results
Magnetic force,
F=mg
g=9.8ms-2
I = 0.96A The angle between the conductor and the magnetic field, θ(°) | sin θ | The reading of the electronic weighing balance, m(g) | m(x10-4kg) | Magnetic force,f(x10-3N) | | | Trial 1 | Trial 2 | Trial 3 | Average | | | 0 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 10 | 0.17 | 0.05 | 0.05 | 0.05 | 0.05 | 0.50 | 0.49 | 20 | 0.34 | 0.12 | 0.11 | 0.13 | 0.12 | 1.20 | 1.18 | 30 | 0.50 | 0.17 | 0.17 | 0.17 | 0.17 | 1.70 | 1.67 | 40 | 0.64 | 0.23 | 0.22 | 0.21 | 0.22 | 2.20 | 2.16 | 50 | 0.77 | 0.28 | 0.26 | 0.27 | 0.27 | 2.70 | 2.65 | 60 | 0.87 | 0.32 | 0.31 | 0.32 | 0.32 | 3.20 | 3.14 | 70 | 0.94 | 0.34 | 0.33 | 0.34 | 0.34 | 3.40 | 3.33 | 80 | 0.99 | 0.36 | 0.35 | 0.36 | 0.36 | 3.60 | 3.53 | 90 | 1.00 | 0.37 | 0.36 | 0.37 | 0.37 | 3.70 | 3.63 |

Result Analysis
The graph of magnetic force

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