Magnetic Force on Wires Essay

558 WordsJul 13, 20133 Pages
MAGNETIC FORCES ON WIRES OBJECTIVE: To determine variation among length, force and current in the magnetic field. APPARATUS: Basic current balance magnet assembly, main connecting unit, set of conductor loops, angle accessory magnet assembly, angle accessory coil, Oahu’s Cent-o-Gram Balance, low voltage AC/DC power supply, large base and support rod, and Banana plug cords. SET UP: Experiment: force against current Step 1: measure the mass of the magnet holder without any current going through it (M0) Step 2: pass current to the loop and balance the new mass (M). the change in mass can be found by subtracting the original mass from the current mass. Step 3: perform the experiment with different amount of current. In each case the change in mass can be determined. Also tabulate results | I (A) | M (g) | ΔM (g) | ΔM (kg) | F= ΔMg (N) | 0.4 | 164.225 | 0.035 | 0.000035 | 0.000343 | 0.8 | 164.36 | 0.17 | 0.00017 | 0.001666 | 1.2 | 164.47 | 0.28 | 0.00028 | 0.002744 | 1.6 | 164.58 | o.39 | 0.00039 | 0.003822 | 2.0 | 164.69 | 0.5 | 0.0005 | 0.0049 | 2.4 | 164.78 | 0.59 | 0.00059 | 0.005782 | 2.8 | 164.86 | 0.67 | 0.00067 | 0.006566 | After plotting the graph it is observed that the graph is a straight line graph. This implies that the current increases with the magnetic force. Hereby making the magnetic force directly proportional to the current. Thus, the equation F=BILSinϑ is confirmed. Experiment 2: force vs length Considering the length of the loop, repeating the experiment for different length. Thus plotting a graph of force against length with the obtained result it is seen that the graph is a straight line graph. L (mm) | M (g) | ΔM (g) | ΔM (kg) | F= ΔMg (N) | 12 | 164.41 | 0.22 | 0.00022 | 0.002156 | 22 | 164.70 | 0.51 | 0.00051 | 0.004998 | 32 | 164.94 | 0.75 | 0.00075 |

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