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# Edexcel A2 Physics, PHY6 Synoptic paper, 17th June 2008 watch

1. yea i know what you mean man, happened to me in my c3, i hate it when im like that, im just quickly gonna finish the chambers and then ill relax
2. Guys..how does the resistance of an insulator change as temperature increases?
3. doesnt it decrease? cuz if u heat it long enough, it can conduct, or so i heard
4. well if its a perfect insulator it should become less, because the atoms that are attached to each atom will have more enery therefor atoms will vibrate knocking of electrons which according to me should decrease the resistance
5. one more thing, a current discharging graph looks just like a charging one, right? the exponential curve??
6. anyone care to please explain spark and drift chambers
7. yea i think so
8. Not sure about drift chambers, spark chambers work like this:

There are pairs of conducting wires with great potential difference in the chamber. As the charged particle ionises the air,the ionised air will jump across the pair of conducting wires and that results in a spark. I don't have the details but that's all i know.(and i got this from discombob, so he has all the credits)
9. bertus ure in RSA?
wen do u take ure xam?
10. hey yea im not really in south africa, im just south african im actually in the the middle east, Qatar right now, Im taking the exam at 3' o clock
11. (Original post by Bertus3223)
hey yea im not really in south africa, im just south african im actually in the the middle east, Qatar right now, Im taking the exam at 3' o clock
3 o clock ure time?
wats the time over there rite now?
12. yea 3 o clock our time lol haha, its 9:40 here now approximately
13. few hours till the exam. Everyone ready
14. When you increase the temp of an insulator to a certain extent, the atoms break down into ions, and then it'll conduct easily.. so resistance decreases.
15. anyone got the jan07 mark scheme?
16. Thanks, creative! You mean atom breaks down into ion?
17. Yeah, but that's if you increase the temperature high enough.. I'd assume if you raise the temperature only a little than the resistance would still increase since the atoms would vibrate more vigorously, causing further electron/atom collisions.
18. so evry1 has the xams at the same instance in the world??
obc the time will b diff in diff countires but the instance will be the same
19. Thanks a bunch, creative!! All the best in your exam! I think i'll just link you guys to this thread, it's really useful, to me at least. The common magnitudes in synoptics that we ARE expected to know.

20. (Original post by ossie007)
so evry1 has the xams at the same instance in the world??
obc the time will b diff in diff countires but the instance will be the same
nope.
i take the exam at 0915GMT

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Updated: June 17, 2008
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