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# Edexcel IAL Physics Unit 3 WPH03 May June 2016 Discussion

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1. Hi everybody !!
How did your exam go ?
Mine went really well unlike chem u3 :V
What was your value for resistivity ?
2. (Original post by ToxicPhantom007)
Hi everybody ?
How did your exam go ?
Mine went really well unlike chem u3 :V
What was your value for resistivity ?
Well mine went good the resistivity was 1.38x10*-6 wbu?
3. Mine was 1.14 x 10*-6
almost same
4. (Original post by ToxicPhantom007)
Hi everybody ?
How did your exam go ?
Mine went really well unlike chem u3 :V
What was your value for resistivity ?
It was great, better that yesterday chem 3. What did u write on how to keep current constant? and the other question about "comment on her plan" For resistivity I got some 1.03x10^-6. something very close to that, I don't remember exactly.
5. For her plan I calculated the percentage uncertainty which was about 12% and said that it was too high, also to keep current constant with a variable resistor
What did you answer for the vernier calliber question
6. (Original post by Sunethra)
It was great, better that yesterday chem 3. What did u write on how to keep current constant? and the other question about "comment on her plan" For resistivity I got some 1.03x10^-6. something very close to that, I don't remember exactly.
To keep current constant, use variable resistor
and in that question, i wrote that the student's plan is unreliable because human reaction time is involved. she should use light gates to improve reliability of her results.
7. my percentage uncertainty came like 15.8 % somethin
for vernier caliper is was A (10.27 cm )
8. (Original post by ToxicPhantom007)
To keep current constant, use variable resistor
and in that question, i wrote that the student's plan is unreliable because human reaction time is involved. she should use light gates to improve reliability of her results.
I said use variable resistor too. I got the Vernier caliper question wrong. I think its A. I said exactly the same this. Human reaction, light gates and also calaulate the distance
9. When will we have a mark scheme?
10. What about the mcq on the si deprived quantity. is it velocity or pascals?
11. I chose pascals. I'm really doubtful about it :/
12. (Original post by iWant.A)
When will we have a mark scheme?
Not sure :?
13. (Original post by ToxicPhantom007)
I chose pascals. I'm really doubtful about it :/
It was velocity pascals is unit not quantity
14. did anyone get their gradient as 4.5?
I made a major error.... i used the diameter on its own as area. how much do you guys think ill get out of 4?
For keeping current constant i mentioned using a power pack set at 0.11A. Any chance its correct?
15. (Original post by tejsanghavi)
did anyone get their gradient as 4.5?
I made a major error.... i used the diameter on its own as area. how much do you guys think ill get out of 4?
For keeping current constant i mentioned using a power pack set at 0.11A. Any chance its correct?
Yeah I got my gradient as 4.444 recurring.
You probably lost 2 marks coz you didnt divide by 2 (lose 1 mark) and your overall answer is incorrect (lose another mark).

Idk about your answer for the constant current one, but from past papers, I think to maintain a constant current, you use a variable resistor.
16. (Original post by tejsanghavi)
did anyone get their gradient as 4.5?
I made a major error.... i used the diameter on its own as area. how much do you guys think ill get out of 4?
For keeping current constant i mentioned using a power pack set at 0.11A. Any chance its correct?
I got gradient at 4.91, I did again using different figures and it came to 4.88.
17. [QUOTE=MrBioBombastic;64723295]It was veloc
18. Alright I got gradient as 4.54 recurring, rounded off to 4.55. My resistivity value was 1.12x10^-6. Do you think my answer fits within the range of possible values?
Also, my graph didn't go through the origin, will I lose a mark?
19. 1-Relation b/w graph2-Which is Derived SI quantity3- Reading From Vernier Caliper4-Free Fall of ball find G5-Find Mean 6- (a)Find Range(B) Percentage uncertainty (C) how far her results were reliable7- Design Experiment to measure Refractive Index of Rectangular8-a How to measure Diametre of wireB how to keep current constantC: fill values in tableD:Plot graphE find gradientF Find resistivity G why the resistivity of same wire was different from ur calculated value assuming all calculations are correct
20. The refractive index experiment was heavenly.

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