![]() ![]() Since I was holding the wire in my bare hand, it burned a lovely “U” into my thumb. Seconds later the filament crumbled, the wires shorted and the wire blew up. I did in fact manage to get a lightbulb filamemnt made by putting cotton thread in a toaster (I wasn’t allowed to use the stove) and when I plugged it into the wall, my home made lightbulb glowed very brightly. The spirit of Darwin was always hovering nearby, as he still does. I tried to create a vacuum by sucking the air out with my mouth. At 8, having just read a book about Edison, I tried to make a filament bulb using a clear glass vitamin jar and some wire. ![]() If you want to do him a favor, buy him a white cane and some dark glasses.ĭisclaimer: As a 10 year old who found a box of 1910-30’s science magazines, I dismantled two batteries, sharpened the carbon rods inside, and with the help of innate childhood stupidity proceeded to strike an arc – and then nearly caught myself on fire. This guy is trying to become ray charles one tiny arc discharge at a time, but no one imagines for a minute that his internal understanding of electricity is wrong. It’s like getting in his face about light being wave-like in nature when you know it’s all particles. Jason, if the guy’s description of the process were wrong, it’s perfectly OK to correct him. Voltage is not the difference in potential, but the amount of work that has to be… well, Jason doesn’t have time to deal with charge and Coulomb’s Law, because Jason chose to use the layman’s description of what is going on.Īnd yet he’s bent out of shape because the author said the voltage goes through a circuit, which is not a mistake, but rather a SHORTHAND term used by many people who learned electronics by connecting things together to make a circuit. Saying that “Voltage is a difference in potential ACROSS something” shows that Jason is OK with using SHORTHAND for describing the work required to move a charge. He pretends that electric potential is a better way to deal with the topic, but this must be distinguished from electric potential energy by noting that the “potential” is a “per-unit-charge” quantity. Voltage is electric potential energy per unit charge, which we call volts but mean joules per coulomb. If Jason wants to be precise, he needs to discuss this at the lowest level that makes sense. Some people can’t handle abstraction, and try to make up for it by being pedantic. This isn’t the first time you have made this minor and very common mistake.” Voltage is a difference in potential ACROSS something. ![]()
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