https://www.chegg.com/homework-help/questions-and-answers/experiment-1-permanent-bar-magnet-introduced-detector-coil-produce-waveform-seen-figure-46-q13093515

https://www.chegg.com/homework-help/questions-and-answers/match-following-events-waveforms-b-c-shown-bar-magnet-intruduced-coil-help-halfway-point-i-q13093645

https://www.chegg.com/homework-help/questions-and-answers/3-experiment-3-triangle-waveform-applied-source-coil-voltage-corresponding-cur-ot-rent-alt-q29563886