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# Official OCR New Spec AS Level Physics: Depth in physics - 9th of May watch

1. I have no idea how that exam went... I answered all but one question but wasn't too sure about some of my answered as I just wrote whatever came to mind, hate that feeling :/
2. (Original post by NickC98)
I have no idea how that exam went... I answered all but one question but wasn't too sure about some of my answered as I just wrote whatever came to mind, hate that feeling :/
Yep that pretty much sums it up for me XD
3. (Original post by Parhomus)
The X axis was x10^-3 so when u divide it becomes what u see
the 6.25 is right. the 10^-3 was not in the unit and so you find a gradient for L^2/10^-3 against R, as by dividng by 10^-3 you arent finding the gradient of the line
4. Did anyone get 7.5 for the gradient?

& for the percentage uncertainty question did anyone get 2.04%?
5. (Original post by Digimon304)
Did anyone get 7.5 for the gradient?

& for the percentage uncertainty question did anyone get 2.04%?
4.1% as it was l^2
6. Only one I'm u certain about was describing the experiment for breaking stress of the wire. What did you guys get for that??

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7. i got 4.6 for the gradient
8. (Original post by jtmass22)
the 6.25 is right. the 10^-3 was not in the unit and so you find a gradient for L^2/10^-3 against R, as by dividng by 10^-3 you arent finding the gradient of the line
No. Think about the experiment for the Planck's constant using LEDs. If you use x10^14 on the freq axis, then find h without multiplying by 10^14, your answer will be wrong, fam

(Original post by Digimon304)
Did anyone get 7.5 for the gradient?

& for the percentage uncertainty question did anyone get 2.04%?
I got 1.02%, to the nearest millimeter means +/- 0.5 mm
9. (Original post by Digimon304)
Did anyone get 7.5 for the gradient?

& for the percentage uncertainty question did anyone get 2.04%?
yep I got 2%
10. (Original post by Digimon304)
Did anyone get 7.5 for the gradient?

& for the percentage uncertainty question did anyone get 2.04%?
I got 4.08 since it was l^2 so I multiplied by 2
11. Doesn't squaring a value double the percentage uncertainty and cubing would be multiply by 3?
12. (Original post by h3rmit)
No. Think about the experiment for the Planck's constant using LEDs. If you use x10^14 on the freq axis, then find h without multiplying by 10^14, your answer will be wrong, fam

I got 1.02%, to the nearest millimeter means +/- 0.5 mm
I think ocr said both were acceptable since there was a lot of discrepancy in textbooks
13. (Original post by Digimon304)
Doesn't squaring a value double the percentage uncertainty and cubing would be multiply by 3?
YEs
14. (Original post by Parhomus)
I got 4.08 since it was l^2 so I multiplied by 2
15. (Original post by amywynn)
I did 0.001 but both are acceptable apparently
16. What were peoples points for the 6 mark on the photoelectric effect?
17. (Original post by sen99)
i got 4.6 for the gradient
Same but I think I had x10^3 on the end since for the x-axis values it was x10^-3?
18. What did you guys write for the stress experiment? Same setup as youngs modulus. Using force over area, so no extension and stuff?

And dat photoelectric effect question? I kept writing the same stuff over xD
19. (Original post by Parhomus)
Oh I got 5.5 x 10^3
I belive I got 5.6 x 10^3, and 0.100 for the bit about finding the resistivity...? Did you get something similar for that?
20. (Original post by geo_sharrock)
What were peoples points for the 6 mark on the photoelectric effect?
Threshold frequency; so it showed that it was a particle as there is no way of explaining this phenomena with the wave like nature of EM radiation. Also explained it talking about how if it was explainable using the wavelike nature then continuous energy stored would eventually lead to electron emission and so the leaf would fall, but obviously it didn't. Also talked about how the intensity doesn't affect the time taken for the radiation below the threshold frequency showing the previous contradiction. Then I said that the fact that the leaf falls faster when intensity increases for uv shows the particulate nature as it means there are more photons per m^2 and so more photons for the one-to-one ratio >>>electrons escape faster so it falls faster.

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