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# WJEC Physics PH5 A2 Exam 18/06/2012 Tweet

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1. Re: WJEC Physics PH5 A2 Exam 18/06/2012
(Original post by EMPStudent)
Yes. But I think this year's paper was significantly easier thus will be around 74 IMO. But may not be that much easier. What does everyone else think?
I found it really easy, but i found June probably easier, well section A and C, I never did the June 2011 case study.
2. Re: WJEC Physics PH5 A2 Exam 18/06/2012
Also people that are well up on UMS and all that, would something like 80/100 in that exam scale up to actually more than just 80% of 132? (UMS of PH5)
3. Re: WJEC Physics PH5 A2 Exam 18/06/2012
(Original post by ThreeCheers)
The case study was kind of easy and I got the formula but I really couldn't answer the question about why the formula suited the statement that Doppler effect works best for large planet close to a small star....what would have been the answer? And it was 4 marks and the next question about applying the same thing to the graphs....??!!

And they wanted us to scale the units for the ECG in Option D... lolwut
for the doppler effect thing you had to explain that Mp >> Ms with d small and explain how implementing that into the equation gave a bigger Vs (radial velocity) which when used in the doppler equation (delta lambda/ lambda = v/c) made it easier to detect a shift in spectral lines.....

I think...
4. Re: WJEC Physics PH5 A2 Exam 18/06/2012
for the doppler effect thing you had to explain that Mp >> Ms with d small and explain how implementing that into the equation gave a bigger Vs (radial velocity) which when used in the doppler equation (delta lambda/ lambda = v/c) made it easier to detect a shift in spectral lines.....

I think...
ah ok thanks, do you mean Ms >> Mp? I sort of outlined what you say but nowhere near as sensibly
5. Re: WJEC Physics PH5 A2 Exam 18/06/2012
(Original post by ThreeCheers)
ah ok thanks, do you mean Ms >> Mp? I sort of outlined what you say but nowhere near as sensibly
yeah sorry, i meant Ms >> Mp. damn that exam was hard, my brains frazzled :P
6. Re: WJEC Physics PH5 A2 Exam 18/06/2012
(Original post by ThreeCheers)
Also people that are well up on UMS and all that, would something like 80/100 in that exam scale up to actually more than just 80% of 132? (UMS of PH5)
Quite possibly, for past papers, A* has been around 81 and full ums has been anything above 88 raw.
7. Re: WJEC Physics PH5 A2 Exam 18/06/2012
(Original post by ThreeCheers)
ah ok thanks, do you mean Ms >> Mp? I sort of outlined what you say but nowhere near as sensibly
no actually i do mean Mp >> Ms
8. Re: WJEC Physics PH5 A2 Exam 18/06/2012
(Original post by ThreeCheers)
The case study was kind of easy and I got the formula but I really couldn't answer the question about why the formula suited the statement that Doppler effect works best for large planet close to a small star....what would have been the answer? And it was 4 marks and the next question about applying the same thing to the graphs....??!!

And they wanted us to scale the units for the ECG in Option D... lolwut
If the distance is small and its a smaller star your dividing by a small number which helps to make v large.
9. Re: WJEC Physics PH5 A2 Exam 18/06/2012
no actually i do mean Mp >> Ms
That wouldn't make sense.

They were talking about exoplanets being bigger. Not exoplanets being bigger than the star it is orbiting

Although the rest of what you said sounds right.
10. Re: WJEC Physics PH5 A2 Exam 18/06/2012
Wasn't too sure what they wanted when they said comment on the magnitude of the charge?

Also for whether the statement agreed with the parameter graph thing?
11. Re: WJEC Physics PH5 A2 Exam 18/06/2012
Can anyone tell me if any of the two planets we had to plot were in the habitable zone??? :/

As for the ratio, can anyone confirm if it was 1/25?

Furthermore, was the force on the point between the two wires out of the paper??

What did you make of the derivation of that self inductance equation = horrible ://
Last edited by MJ*; 18-06-2012 at 18:12.
12. Re: WJEC Physics PH5 A2 Exam 18/06/2012
the resultant force on the point p was to the right with a force of 1.2x10^-6 T
13. [QUOTE=stevieb12;38195107]the resultant force on the point p was to the right with a force of 1.2x10^-6 T[/

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14. (Original post by stevieb12)
the resultant force on the point p was to the right with a force of 1.2x10^-6 T
Yeah MATE got the same as you MATE

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15. Re: WJEC Physics PH5 A2 Exam 18/06/2012
(Original post by Bland New Eyes)
Wasn't too sure what they wanted when they said comment on the magnitude of the charge?

Also for whether the statement agreed with the parameter graph thing?
The charge was 0 thus meaning that the time taken to discharge is less than 50ms
16. Re: WJEC Physics PH5 A2 Exam 18/06/2012
(Original post by MJ*)
Can anyone tell me if any of the two planets we had to plot were in the habitable zone??? :/

As for the ratio, can anyone confirm if it was 1/25?

Furthermore, was the force on the point between the two wires out of the paper??

What did you make of the derivation of that self inductance equation = horrible ://
1/25th for the sun Jupiter area comparison? I put 1/400th since it was a 20th of the size and Area is pir^2 so it was 1/20^2? I plotted one in the habitable zone and one outside.
17. (Original post by EMPStudent)
The charge was 0 thus meaning that the time taken to discharge is less than 50ms
Oh excellent news, I said that! xD

I didn't find it too good, I hope I got maybe 50-60%, I'll be ecstatic if I get a D.

A D may not mean much to some people, but it's a personal achievement for me!

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18. Re: WJEC Physics PH5 A2 Exam 18/06/2012
(Original post by somaiyar)
Yeah MATE got the same as you MATE

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Ah nice one MATE, tell you what MATE meet me at the local, get a couple bevies in and we'll sort out the other answers MATE
19. Re: WJEC Physics PH5 A2 Exam 18/06/2012
(Original post by RhysHamer)
Oh excellent news, I said that! xD

I didn't find it too good, I hope I got maybe 50-60%, I'll be ecstatic if I get a D.

A D may not mean much to some people, but it's a personal achievement for me!

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A 60% on that paper would probably be a B. Well done Rhys, good on you Pob lwc!
20. (Original post by EMPStudent)
A 60% on that paper would probably be a B. Well done Rhys, good on you Pob lwc!
I meant an overall D

Diolchn

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