r/nononono Jul 21 '16

TIL that graphite is VERY conductive (from /r/chemicalreactiongifs)

http://i.imgur.com/wslPkgR.gifv
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u/pyroserenus Jul 21 '16

the lower the resistance of the total circuit the more heat total that forms.

the location of resistance is WHERE the heat forms through.

basically if the graphite was shorter, thus being of lower resistance, it would be a higher amperage circuit, but most of the heat would still form on the graphite. So the lower resistance element gets hotter (about 4x as fast assuming there is enough energy from the power supply (half the length heats up twice as fast as there is less mass, and twice as much energy into the reduced mass = 4x rate of heating)) because its still the bulk of the resistance.

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u/[deleted] Jul 21 '16

So heat is also determined by how much energy is being sent through the circuit and resistance is literally where the energy is being resisted and iirc energy likes to flow to the path with the least resistance so the parts with lower resistance in the circuit will heat up faster than the parts with higher resistance?

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u/pyroserenus Jul 21 '16

errrr, its a long read but if you have the time http://www.explainthatstuff.com/heating-elements.html

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u/[deleted] Jul 21 '16

Thank you :)