You can invalidate the circuit theory with, well perhaps not $50 worth of hardware, but a bit more: https://youtu.be/oI_X2cMHNe0 https://youtu.be/oI_X2cMHNe0

You can invalidate the circuit theory with, well perhaps not $50 worth of hardware, but a bit more: https://youtu.be/oI_X2cMHNe0 https://youtu.be/oI_X2cMHNe0 I'm not sure how do you plan to invalidate Maxwell's theory, which shows that energy flows entirely outside of wires, with $50. Or any other amount of equipment. It would be very much welcome in the physics community. This misconception is even more widespread than "planes fly because of Bernoulli" because it's so incredibly useful when designing most circuits/PCBs. Though it is, fundamentally, a lie. PS. Circuit theory is made to match reality for the case showed in the video via the concept of a transmission line.