Faraday's disc was inefficient and of no use as a practical generator, but it showed the possibility of generating electric power using magnetism, a possibility that would be taken up by those that followed on from his work.
The Electrochemistry section
The Electronics section
Thus, the work of many researchers enabled the use of electronics to convert signals into high frequency oscillating currents, and via suitably shaped conductors, electricity permits the transmission and reception of these signals via radio waves over very long distances.
There are seven general references listed in this article. WP:V accepts general references as a valid means of verifying an aticle except for certain specific categories of information. The GA criteria do not impose any additional constraints. Despite the attitude of many reviewers that inline cites are always wanted, this has never been a requirement. Thus, lack of inline citations does not equate to uncited and is not a valid reason, in itself, for failing a GA. The OP states that this "should be relatively easy to fix." If the OP is not challenging the material, one has to wonder why they have not just attempted to fix it themselves rather than bring it to review. I note that most of this material was not in the article at the time of promotion, so worst case, it could just be removed again to bring it back to GA condition. The bullet point that was in the article is on the Faraday disc, which is not only an extremely well known fact, but as the OP said, is very easily cited [1][2][3]. SpinningSpark13:42, 16 February 2023 (UTC)[reply]
Ok, but general references should at least be shown in the section it's sourcing in my opinion. The entirety of the Electrochemistry and Electronics section look unsourced. Where is the general reference for them? It's not in the section at all so i have to assume. Plus, when i say "should be relatively easy to fix." I say that because I mention that someone with enough knowledge can fix this. I can't because I'm not knowledgeable with energy related topics nor at finding sources for them. That's why i've opened this review, someone can help save the article. Onegreatjoke (talk) 17:39, 16 February 2023 (UTC)[reply]
WP:GENREF, which are indeed perfectly acceptable, are almost always listed at the end of an article. When reviewing GAs, especially at GAR which can be demoralising to people, it's really important not to impose your own standards. Inline cites are better, but not required for a GA. —Femke 🐦 (talk) 17:49, 16 February 2023 (UTC)[reply]
"...general references should at least be shown in the section it's sourcing in my opinion". GA should be judged on the criteria, not on your opinion, which is ridiculous. If the reference was shown in the section, it would be an inline ref, not a general ref by definition. The question is not whwere is the general ref for those sections, but what part of them is it required to have an inline cite according to WP:V. SpinningSpark18:09, 16 February 2023 (UTC)[reply]
Hughes has a chapter on electrolysis, a chapter on semiconductors, and a chapter on electronic systems. Those cover at least the majority of the sections you identified as problematic. SpinningSpark18:24, 16 February 2023 (UTC)[reply]