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# Edexcel IAL Physics Unit 3 WPH03 May June 2016 Discussion

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did u convert the diameter to radius? Gradient was 4.96 i think so when u round it would be 5 not sure if urs was right.
OH NO i forgot to convert the diameter to radius, ahhhhhh ok thank you for that!! Overll think i only lost about 6 marks in total so hopefully thats still an A. What are your predictions for the grade boundraies
2. how did u guys find the gradient....
3. (Original post by Suhaib.134)
OH NO i forgot to convert the diameter to radius, ahhhhhh ok thank you for that!! Overll think i only lost about 6 marks in total so hopefully thats still an A. What are your predictions for the grade boundraies
The equation for the area is πd^2/4
4. For the comment on time q I multiplied 0.38×2 and then divided by 3 x 100
So rxn time is 25% of actual time.
Is it wrong😢😢😢?
5. I got the same as Hyyoriiki!
6. How did u guys find the gradient
7. Was the graph a straight line or a curvy type of thing. I did the first part as straight line but the last part as a curve.....will i get any marks
8. If i get my answer wrong for gradient and the resistivity but my method is correct will i get any marks for method
9. Plz sum1 reply soon....m very tensed
10. (Original post by bibliosmia)
I got the same as Hyyoriiki!
Then I wrote that rxn time is too significant so time reading inaccurate.
I thought I was the only one😥
11. (Original post by jannz)
Was the graph a straight line or a curvy type of thing. I did the first part as straight line but the last part as a curve.....will i get any marks
It was a straight line going through and near some points. You shouldn't have drawn a curve because a best fit line is always a linear straight line.
12. What did you guys write for the very last question in which it was asked that why is there a difference in between your calculated value and real value of resistivity?
13. (Original post by ToxicPhantom007)
It was a straight line going through and near some points. You shouldn't have drawn a curve because a best fit line is always a linear straight line.
In this case it was, but not always. I've seen some questions which asked you to draw the line of fit but the actual answer is you're supposed to draw a curve. Really confusing :s
14. (Original post by azefayuu)
In this case it was, but not always. I've seen some questions which asked you to draw the line of fit but the actual answer is you're supposed to draw a curve. Really confusing :s
ummm... you didn't get the point there. BEST line of fit means that it must be a straight line. Search on google if you want. I study statistics too and I've learned this from my statistics book
15. (Original post by ToxicPhantom007)
ummm... you didn't get the point there. BEST line of fit means that it must be a straight line. Search on google if you want. I study statistics too and I've learned this from my statistics book
At first i even drew curve but then i erased and drew a straight line
16. (Original post by azefayuu)
In this case it was, but not always. I've seen some questions which asked you to draw the line of fit but the actual answer is you're supposed to draw a curve. Really confusing :s
Yes like in January 16 right ? But it confused me as well but ThanksGod i drew straight line
17. I think Boundaries are going to be like 35 for an A
18. best line of for can be straight line or curve line, it depends on the relationship between two different variables
Say plotting a graph of current against voltage for filament bulb, because of its property, resistance would increase with current, so the graph will be like a curve instead of a straight line!
19. If i drew the first part of the curve straight but last part as curve and all my axes labelling is correct .....how much marks might i get out of 4.....anyone???
20. (Original post by don't cry-craft)
Wasn't the question for the S1 derived unit?
Nope it was derived quantity

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