4 ms·
That's fairly intuitive. The lower current being present before the signal arrives is not intuitive.
by soneil 5y ago
That's fairly intuitive. The lower current being present before the signal arrives is not intuitive.
- deleted 5y ago[deleted]
- sega_sai 5y agoI just arrives through the air. The electromagnetic wave will propagate with similar speeds through the air and wire.
- soneil 5y agoI didn't finish the video (yet, no fault of the video, just bad timing), but I don't think it's EMI - the "pre-current" looked fairly flat, and EM doesn't like flat. I'd expect EMI to show as a spike timed to match the leading edge of the signal.
- foxfluff 5y agoI think the takeaway is that EMI looks flat for a while if you run half a kilometer of wire next to a half-a-kilometer long source of EMI. The leading edge isn't there for one nanosecond and then gone, it travels down and continues to induce a current to the adjacent conductor, a current which must continues to flow.