Faraday’s Law
Technical Definition: “Faraday’s Law states that changing magnetic fluxes through coiled wires generate electricity (currents and voltage). The greater is the change in magnetic flux, the greater are the currents and voltages. In this lab you will be shaking a tube which has a magnet that will travel back and forth through a coil of wires. You will show that the faster you shake the tube, the greater will be the generated voltage.”
Simplified Definition: Faraday’s Law states that changing the magnetic flux through a coil produces electricity. So the faster the conductor passes through the coil, the greater the change in flux, and the more electricity that is produced. FASTER SHAKE equals MORE ELECTRICITY”
Our data was set to increasing the amount of shakes over a fixed amount of time, 30 seconds. In other words, we increase the speed at which the conductor passes through the magnet. The final value is the sum of voltages gathered throughout the trial.
|
0 shakes |
30 Shakes |
64 shakes | 90 shakes | 120 shakes |
| -0.78449 | 0.10078 | 6.41314 | -0.96411 | 0.0238 |
| 0.04946 | 0.01097 | 6.45163 | 0.26757 | -5.58291 |
| 0.06229 | -0.00186 | 0.0238 | -3.77388 | -0.00186 |
| 0.01097 | 2.24339 | 1.16567 | 0.13927 | -5.57008 |
| 0.0238 | 0.0238 | -0.04035 | 0.13927 | 0.01097 |
| 0.07512 | 0.10078 | 4.53996 | -5.55725 | 0.7936 |
| 0.10078 | -5.57008 | -1.93919 | -0.24563 | -0.05318 |
| 0.03663 | 0.01097 | -0.20714 | 0.83209 | 6.47729 |
| 6.57993 | -0.00186 | 0.08795 | 1.46076 | 0.10078 |
| 0.10078 | 0.0238 | -1.82372 | -0.06601 | -0.02752 |
| -0.00186 | 0.06229 | -0.2328 | -2.77314 | 6.52861 |
| -0.00186 | -0.00186 | 0.22908 | -2.22145 | -5.54442 |
| -0.00186 | -0.00186 | -1.65693 | -1.40033 | -0.00186 |
| -0.00186 | -0.00186 | -1.42599 | 1.84566 | -0.14299 |
| -0.00186 | -0.16865 | 1.84566 | 2.62829 | -3.50445 |
| 0.10078 | 0.08795 | -1.46448 | -3.60709 | 0.03663 |
| 0.01097 | 0.0238 | -1.37467 | -0.55355 | -0.07884 |
| 0.08795 | -0.00186 | 0.01097 | 2.7181 | 3.84714 |
| 0.04946 | -0.05318 | 3.85997 | 2.64112 | 0.04946 |
| 0.08795 | 1.28114 | 0.1521 | -0.04035 | -0.07884 |
| 0.11361 | -0.00186 | -2.01617 | -0.96411 | -0.18148 |
| 0.07512 | -0.00186 | -1.45165 | 1.74302 | 3.24413 |
| 0.08795 | 0.07512 | -3.96633 | 3.8728 | -1.96485 |
| 0.07512 | 0.0238 | 2.21773 | -3.10672 | 0.22908 |
| 0.06229 | 0.07512 | -2.029 | -0.04035 | 0.08795 |
| 0.03663 | -0.14299 | -0.19431 | 0.11361 | -0.00186 |
| -0.01469 | 0.07512 | 1.85849 | 3.28262 | -3.02974 |
| 0.07512 | -0.00186 | 1.28114 | -1.95202 | 1.78151 |
| 0.10078 | 0.08795 | -1.41316 | 0.0238 | -0.82298 |
| 44.02659 | 37.8107 | 177.1795 | 144.8581 | 232.7844 |
Our data and graph support Faraday’s Law. In general, our graph had a positive upwards trend, meaning an increase in speed of shaking increased the total voltage produced by the generator. However by the graph, our data taking was not entirely accurate. The main problem was trying to count the number of shakes accurately, especially as the speed of the shaking gets higher and higher. Trying to shake at a constant speed throughout the whole trial was also not entirely accurate either. Overall this experiment is very prone to operation error, but the overall trend of our conclusions is still true.