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A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012 Tweet

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1. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
Overall easy paper. I took a beaker full of water and dipped the diode in it and labelled it! You don't have to worry about, how diode is an electrical component and may not work well under water! It was a ditto of NTC thermistor!

K uncertainity - 8.4%
V uncertainity - 3.9%
Value of K - 6.17

Theory not supported, since percentage difference in K (37.1%) relating to the given g=9.81 was greater than percentage uncertainity in K.

I am just confused about the value of the Temperature of the asteroid (Weinn'z Law Question)

my value of T was 193.2k coz i drew a straight line...not a CURVE...it clearly stated BEST FIT LINE..even though most of the people drew a curve.....
2. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
My value for T was 193.5...

Most of the people who knew the shape of the curve, even they drew a straight line! The curve was clearly given in Hodder Physics A2 textbook!

Best fit line doesn't always have to be a straight line!

Anyways, I found out the range of T since you have to estimate it! I tried extrapolation! But the same result comes

So my guess would be anything around 200 is fine! Some people had answers 200-210K. So anything around 200 is fine!
3. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
Overall easy paper. I took a beaker full of water and dipped the diode in it and labelled it! You don't have to worry about, how diode is an electrical component and may not work well under water! It was a ditto of NTC thermistor!

K uncertainity - 8.4%
V uncertainity - 3.9%
Value of K - 6.17

Theory not supported, since percentage difference in K (37.1%) relating to the given g=9.81 was greater than percentage uncertainity in K.

I am just confused about the value of the Temperature of the asteroid (Weinn'z Law Question)

I took the wavelength to be 12.2 x 10^-6m and got temperature around 238K .
4. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
My value for T was 193.5...

Most of the people who knew the shape of the curve, even they drew a straight line! The curve was clearly given in Hodder Physics A2 textbook!

Best fit line doesn't always have to be a straight line!

Anyways, I found out the range of T since you have to estimate it! I tried extrapolation! But the same result comes

So my guess would be anything around 200 is fine! Some people had answers 200-210K. So anything around 200 is fine!
What was your value for wavelength?

Didn't the highest cross fall in the middle of 10-15 range? Or did you peak your curve to the maximum possible intensity?
5. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
My value for T was 193.5...

Most of the people who knew the shape of the curve, even they drew a straight line! The curve was clearly given in Hodder Physics A2 textbook!

Best fit line doesn't always have to be a straight line!

Anyways, I found out the range of T since you have to estimate it! I tried extrapolation! But the same result comes

So my guess would be anything around 200 is fine! Some people had answers 200-210K. So anything around 200 is fine!

Well i would say people who drew the curve had temp around 230-240k...but people who drew srtaight line had answer around 190-200k.....but bro iz it really possibly logical enough to say BEST FIT LINE can actually be CURVE....well people who drew the curve had good logic bcoz acc to theory it had to be curve but ALAS the question said LINE.....
6. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
As I posted earlier, I extrapolated, and found out the answer, which was 198K, anything around 200 is perfectly fine!

Wavelengthmax= 15x10^-6m

The graph will be a curve not doubt about that! And for every question like gradient from graph, which we have to estimate, has always a range to the answers. If you fall in that range, you will get full marks. This question was something like that, answers will vary person to person depending on their estimation.

Here the answer of T depended on the wavelength. And if you estimated anything between (15 to 16.5) x 10^-6m you are safe!
7. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
i got 241.5 K
8. Does anyone know which experiment we must know for the exam?
Like last year the Rutherford experiment came up. Do we need to know any of the experiments from the edexcel books? If so which ones?
Any help is greatly appreciated.

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9. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
Practical 1 Momentum and momentum conservation - large trolleys
Practical 2 Momentum and momentum conservation - small trolleys
Practical 3 Momentum and momentum conservation using a linear air track
Practical 4 Rate of change of momentum using a linear air track
Practical 5 Rate of change of momentum using a trolley
Practical 6 Centripetal force - whirling bung
Practical 7 Centripetal force - rotating trolley
Practical 8 Measuring the charge stored by a capacitor
Practical 9 Effect of length and current on the force on a wire in a magnetic field
Practical 10 Specific heat capacity of a liquid
Practical 11 Specific heat capacity of a solid
Practical 12 The relationship between the pressure and temperature of a gas
Practical 13 The relationship between the pressure and volume of a gas
Practical 14 Measurement of the activity of a radioactive source
Practical 15 Simulation of radioactive decay
Practical 16 Graphical representation of simple harmonic motion
Practical 17 Forced oscillations
Practical 18 Investigating damped oscillations

These are the experiments you need to know. Most of the experiments are in the Hodder A2 Physics Textbook. In this book, there is also a section named A guide to practical work, that section has mostly everything regarding uncertainties.

And also, you are required to have knowledge of AS. Try to solve May 2012 6B paper, you will come across two questions from your AS physics! Question paper pattern is changing!
Practical 1 Momentum and momentum conservation - large trolleys
Practical 2 Momentum and momentum conservation - small trolleys
Practical 3 Momentum and momentum conservation using a linear air track
Practical 4 Rate of change of momentum using a linear air track
Practical 5 Rate of change of momentum using a trolley
Practical 6 Centripetal force - whirling bung
Practical 7 Centripetal force - rotating trolley
Practical 8 Measuring the charge stored by a capacitor
Practical 9 Effect of length and current on the force on a wire in a magnetic field
Practical 10 Specific heat capacity of a liquid
Practical 11 Specific heat capacity of a solid
Practical 12 The relationship between the pressure and temperature of a gas
Practical 13 The relationship between the pressure and volume of a gas
Practical 14 Measurement of the activity of a radioactive source
Practical 15 Simulation of radioactive decay
Practical 16 Graphical representation of simple harmonic motion
Practical 17 Forced oscillations
Practical 18 Investigating damped oscillations

These are the experiments you need to know. Most of the experiments are in the Hodder A2 Physics Textbook. In this book, there is also a section named A guide to practical work, that section has mostly everything regarding uncertainties.

And also, you are required to have knowledge of AS. Try to solve May 2012 6B paper, you will come across two questions from your AS physics! Question paper pattern is changing!
Is that for coursework? I went through the spec yesterday and didn't see anything about knowing practicals for the written papers
I've already finished the coursework just want to knw whether I should learn all practicals for the written exams

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11. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
(Original post by 584385)
Revision notes for edexcel unit 5
12. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
(Original post by d_94)
Here is Nuclear decay...just one little bit missing will try and finish it by then end of the week
Attached Files
13. NUCLEAR DECAY.pdf (313.1 KB, 132 views)
14. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
(Original post by 584385)
Here is Nuclear decay...just one little bit missing will try and finish it by then end of the week
Greatt! Thanks (: Take your time with the remaining.
15. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
Hey. help please , does anyone have past papers for a2 physics unit 4 ?????
16. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
(Original post by Zombie _94)
Hey. help please , does anyone have past papers for a2 physics unit 4 ?????
Unit 4 papers
Attached Files
17. Unit 4 jan 2010.pdf (529.4 KB, 113 views)
18. Unit 4 jan 2011.pdf (229.5 KB, 23 views)
19. Unit 4 jan 2012.pdf (710.8 KB, 74 views)
20. Unit 4 june 2010.pdf (368.3 KB, 82 views)
21. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
Unit 4 Mark schemes
Attached Files
22. Jan 2010 U4.pdf (113.0 KB, 361 views)
23. Jan 2011 U4.pdf (290.7 KB, 390 views)
24. June 2010 U4.pdf (129.8 KB, 406 views)
25. June 2011 U4.pdf (305.7 KB, 1130 views)
26. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
Thanks alot
27. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
Anyone got the June 2012 papers they would help aaaalllllloooooootttttttt
28. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
(Original post by elkana)
Anyone got the June 2012 papers they would help aaaalllllloooooootttttttt
Hahahha. I wish there was
29. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
Cba for this exam lol
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