We all know that a photo diode can be used as a light detector and as a light emitter (although the way that it's built will usually make it specialized to prioritize one application over the other); an electric motor can become an electric generator and vice-versa.
How does one run a resistor in reverse bias (ie: turn heat into electricity, rather than electricity into heat)?
Something in my gut (but I had a hard time googling it) tells me that if I hold a resistor over a candle flame: it won't instantly become a little battery. So do I add an oscillating inductive coil around it; should I hold it over a candle but add a diode? I'm at a loss on this one.
Please note: I have like zero budget and no safe laboratory space for tinkering, so out of a general respect for my home: I have to avoid the funner flammable projects, so this is why I need to ask dumb questions, because I'm prevented from experimenting; otherwise I wouldn't have bothered you all.
I'm asking: what is a resistor's true [secondary] output (other than reduced electrical current) (is it 'heat', or is it just some subatomic phenomenon that manifests as 'heat'), and how do I feed that back into a 'dead' [as in: "no current is flowing through it"] resistor to get an electrical current flow? What form would this hypothetical flow take? Would each metal contact of the resistor become negatively charged [with each metal end acting like its own 'mini-ground' from the resistance-induced ionization]? (Internal friction can cause an electrical field, just like external friction can too right?)
I partially feel bad for asking [because it feels so elementary], but if I don't: I'll remain ignorant.
Thanks for your time😊
(I know this is April 1st in some parts, but I forgot, right after I typed out my whole question, so I'm gonna go out on a limb, and if I get accused of tomfoolery I'll just delete my question, and ask it on day that's not gonna net me suspicion (because I'm somewhat lazy and don't want to forget to ask on April 2nd))