Resistivity of the Material of a Wire - A Level Physics Core Practical

One of the core practicals in A Level Physics. This uses an Ohmmeter to measure the resistance of a wire directly.
By varying the length of the wire, and taking sets of data across several thicknesses we can get to a value for the resistivity of the material in question.

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[mrhphysics]

Thank you for the idea, Mr. Betts. I look forward to using this investigation in the upcoming academic year.
-MrH

[paro]

what are safety precautions within this practical

[rf]

can you post a video on how to connect an AF oscillator(signal generator) and a CRO to a single stage amplifier and h parameter experimental setup on a bread board

[AndrewBailey-fn]

Hi Kit, I am a science technician supporting A level physics. I find your videos really insightful. Have you used an excel formula to calculate the radius and area? I cannot seem to match your figures in trying to work it out, so then I can transfer onto my data to work out.

[sethfreemanpayne]

What voltage and current did u put through the wire ??

[ia]

why would you use the multimeter instead of the ohmeter? it because there would be less resistance

[lizzyphilips]

Hi thanks so much for the helpful video! I'm just wondering why don't you need to connect a power supply to measure the wire's resistance? Would it be different if you measured the current and voltage separately and used the values obtained to find the wire's resistance instead?

[alexliu]

What happens if we did multiple trials? Can we still go with that and get an average of the resistances or just the best one trial would do

[rf]

In 2 days maybe...please would you?? i have an exam i have to connect the whole circuit by myself... and the handling would count

[tim]

why is my multi meter showing the same resistance for my wire no matter where i put it. Also, the numbers on my multi meter are going everywhere, from 150 to 0.4, before they reach the same number.

[grevolution]

excuse me but could you please do the practical on how to measure percentage loss in kinetic energy using a ball. thank you.

[KitBetts-Masters]

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