Young's Modulus of Copper - PRACTICAL - A Level Physics

In this video I go through an AQA Physics A Level Required Practical that uses a Young's Modulus experiment to calculate the Young's Modulus of copper wire. (This is AQA Required Practical 4.) This is also the OCR A Level Physics PAG 2.1 Practical.

This is a straight-forward way to measure the Young's Modulus of a material. Copper wire is often used as it is stretched by weights hung over the edge of the bench, with the small extension carefully measured with a ruler. Wear eye protection in-case the wire snaps.

Thanks for watching,

Lewis

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[djfish]

The 9 dislikes were the people whose wire snapped and hit their eyes.

[kieranarmstrong]

Cheers mate helped a lot all these videos with these TAG assessments coming up

[mattwhitelock]

Surely as you are stretching the wire, the cross-sectional area will get smaller?

Wouldn't this throw off results, as another variable is changing?

[AlokJadva]

3:29 sir did you really need to say all that 😂😂😂 my eyes are feeling weird

[harrywatt]

Since YM= stress/strain could you not plot a graph of stress against strain, where the gradient is now the YM?

[abhishekvijay]

turn on subtitles at 1:04
Edit: please like or comment when you see this so that I can revisit this clip😂

[umayyahosman]

Isnt the length L from the fixed end at the G clamp right until the end of the wire? Just need to clarify please

[yasminrose]

why do you measure the young modulus for copper in this way and not in the same way as steel?

[mariehill]

Hi 👋
I just had a question, how would you calculate the percentage uncertainty in the force if you have multiple different forces that you are applying to the object?

Secondly, once you work out the percentage uncertainty in the force, area, extension and original length, how can you calculate the percentage uncertainty in the Young Modulus altogether?

[ethankirk-harding]

Why do you use pi*D^2/4 and how does that differ from using PI*r^2

[shantogub]

Calculate the value of Young's modulus of
Brass wire by hanging the weight 0g, 500g,
1000g. Perform the whole experiment in
Uranus.

[hannieshah]

how would you convert mm^2 to m when calculating the wire cross sectional area?

[kingrobert]

why does l have to be as long as possible you never said why