How does temperature affect the resistance of a wire and how could it be measured?

Answer 1

Usually in most metals (such as wires etc.) Resistance increases with temperature (this is because the atoms, and thus electrons have more vibrational energy)

ΔR = k ΔT (where R is resistance, k is a temperature co-efficient of a material and T is the temperature) You can see if you increase T then R must also increase.

As for your wire, connect it to an ohm meter at room temperature and measure the resistance, then heat up the wire in the middle using a lighter or similar and watch the resistance increase on the meter.

Answer 2

resistance increases proportionally to temperature.

Platinum wire is excellent for this because a piece of platinum wire has a 1:1 ratio of temperature to resistance over a wide temperature range.

You simply hook a section of wire up to a multimeter, measure temperature and resistance. Change the temperature and take the readings again.

Note that you can get to a low enoguh temperature to where you get a "superconductance" and the proportion quits being linear.

Above some given temperature the wire melts and usually just as the wire vaporizes, resistance drops due to the way the wire "sprays" metalic atoms. (thus a light bulb "flashes" brightly just as it burns out)

Answer 3

Very cold temperatures make the wire shrink. Therefore causing resistance.

You can measure this with an AC/DC meter.

Answer 4

temperature of wire effects its resistace by allowing the ecletrons faster move ment (cold wire) the cold wires molecules are moving very slow all most siting still and this allows the electrons to move more freely with -less resistance while a hot wires molecules are moving very fast and they are buming into each other this does not allow the electrons to move though it easly -more resistance
you can measure it by knowing the type of wire and the spaceic heat and the diammeter and leght , temp
but i dont know the formula to calucutal it
the other things that effect resistance are length diammeter and type of wire
i hope this helps