What does temperature do to resistance? (44) 

Yes James is back 🙌👏👏👏👏👏

Nice to see you back

Welcome back JBE, missed your videos, hope you are well mate.

Nice to see you back J B

Hellooooooo stranger great to see you back pal proper cheered me up Thanks kido 👍🏻

Happy new year and its great to see you back on youtube :)

Nice to see you again. Always enjoy your vids.

Hi Beck nice to see you back. I think It would be better if you heated the copper wire itself not the insulation.

Nice to see you back. Upload more videos regularly. Looking forward to the videos of you building the new shed.

Good to see you back mate 👍

Welcome back James hopefully we will see some more videos from you

Very interesting video. Yes, please post the video of you building your new shed / workshop.

Great video, I was expecting the resistance to lower not go higher! Have missed your videos. Keep safe.

Great Experiment proving that the resistance of a conductor is proportional to: it's material' its length, it's Xsectional area and it's temperature.

Decent little vid that 👍

He,s alive 🤣

Be good if you could put the video up of you building the shed as I’m looking to do one my self 👍👍

Welcome bEck.

It's good to see you back. I vote yes on the shed video, more work for you on the edit. This is a great experiment, great video. It was surprising that the relatively small amount of heat raised the resistance that much over 2 meters. IF anyone is interested in an explanation (plus a bit more) about low temperature superconductors have a peek here ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-SGnTIdeCbl0.html It's short and the real explanation is in the first minute. For JB, the LHC gets a mention.

Cool although this does lack the resistance in temperature with current flow so looking forward to more. Theoretically the resistance won't increase with a large load if the cable is Cooled it's the difference between overhead lines and buried conduit.

Good to see you back and look forward to seeing she’d building videos, but are you going to still film typical electrical jobs when out and about? Because you can never have too many of them, especially as Dave Savery’s gone but quiet, DSS Dan and even Tom Nagy. Tip the balance back!

And here’s me thinking the knob was behind the blow torch not on the back of it 😀 it’s kind of a catch 22 situation isn’t it, a bad connection, or high resistance joint will get warmer, and in turn, the resistance will get even higher causing it to heat up even more 😂 lovely stuff !

Where have you been! Welcome back though.

you should have used a tub of 70oc water for the hot test instead of the flame

Does the new shed have a Beck door? Sorry dude, it's late. It would be cool to know how much the copper expands/contracts when it is heated/cooled. Would the hotter/cooler the copper gets have more or less of an effect on the CSA? (even if microscopic increments) Cool video.

Resistance can't drop to much in cold, as it's 0.02/0.03 ohms at 9 deg c surely it can only drop to zero ohms. On the other hand heating it can make it keep going up until the copper melts can't it?

Hi JBE looked high and low for your contact details regarding work can't find you on the net ????.

Great video, questionable temp measurement on the hot test, pvc coating will not burn till around 80c. Could have left on the metal conduit and heated from inside the pipe for a more even spread

and what time do you call this? 🙂

Could you not of put it on a hob and in a freezer?

Are you going to get Davo Savo and NBundy to do the electrics, that would be comedy gold (a bit like fools and horses meets dad's army !)

-20. What sort of freezer do you have? A Vaccine storing freezer?

He’s back.....gone too long JB. The most articulate RU-vid electrician. JB does JW🤣 not surprising the temperature rise was much slower given you need to get through that insulation layer.

Sorry, it’s not cold it’s fucking 38 degrees here in Aus. Let’s not forget that the hadron collider at CERN uses cryogenic chambers to cool it’s super magnets to 1 kelvin -271 degrees C or absolute Zero to lower the resistance of the super alloy, Around each filament there is a 0.0005 mm layer of high-purity copper. Based on physical measurements it is a Rutherford cable, 1.510 cm broad, the mid-thickness being 1.480 mm, tolerances are only a few micrometers. Copper is an insulation material between the filaments in the superconductive state, when the temperature is below -263C. When leaving the superconductive state, copper acts as a conductor transferring the electric current and the heat. Niobium-titanium is an superconducting alloy

So you don’t need a unit to do testing then 😂