In addition to answering a number of questions on the ActivPhysics website on Wednesday, we conducted in an experiment in which we were to determine the inductance of the coil in the above picture. We calculated the inductance by using the dimensions of the coil and also by using the oscilloscope to estimate the half time of exponential decay.
The answer in the box is the actual inductance that Professor Mason measured while the larger value is the value we came up with using the half time of exponential decay. As one can see, our calculation was not very accurate. 
This is the calculation of the coil's inductance using the dimensions of the coil. It is much closer to the true value than the previous calculation.
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