Experiment 2-2: Hand-Off Package
PROCEDURE : Use the experiment 2-1 setup, with three different lengths of coil. The different
coil lengths used in this experiment are 5.5cm, 19.5cm, and 33.5cm long. Ensure the noise
rejection and HF are enabled and set the x-scale on oscilloscope to 100ms and y-scale of
2V/ with a trigger point of 100mV. To begin running trials, press the single button and drop
the magnets through the center. For each coil length, three trials will be run from the same
drop height of 5cm above the coil, in the middle of the coil. 30 magnets will be dropped
consistently. The time between the waveforms will be measured from peak to peak. Make
sure to align each of the cursors with the center of each peak. Note: zooming in is
required to get accurate cursor alignment of the peaks.
FIGURE :
Defining the Model
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Let t represent time
Let x represent coil length
Propagating Uncertainty: 𝜹𝒕 = √(𝟎. 𝟎𝟕𝟖)𝟐 + (𝟏. 𝟔)𝟐 = 𝟏. 𝟔
Equation: t = 3.53x + 25 ± 1.6
MODEL SUMMARY: As the length of the coil increases, the time between the two peaks
increases. This is because the time it takes for the magnet to get between the first region of
maximum voltage and second region of maximum voltage takes longer. For small
distances, we expect this process to be linear, since the magnet doesn’t have time to
accelerate much.