Part 3/7:
Upon reaching 125 volts, the narrator begins to take initial measurements with the magnetometer. They express interest in the "interesting display" of AC output, indicating a fascination with how varying electric fields interact with magnetic ones.
As the voltage is gradually decreased, the narrator comments on the presence of "stray energy," suggesting that even at lower levels, there is a detectable influence on the readings. The narrator takes note of how far the measurable magnetic field extends, estimating it could reach roughly four feet away from the magnetometer. This aspect is crucial as it highlights the range of magnetic influence in relation to voltage changes.