Researching inductor parasitics, I found this cool manuscript by radio amateur David W Knight. To visualize the E-field in and around coils, they used a gas discharge tube! Even if you're not up to the math, check out the PDF linked below for a few more cool pictures 😄 

https://g3ynh.info/zdocs/magnetics/appendix/self_res/self-res.pdf

#physics #electronics #science

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