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AQA AS Physics A Unit 2 25/05/12 - PHYA2

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Difficulty of exam (120 UMS boundaries)

Very easy (68-70 for 120 UMS) 4%

Easy (64-67 for 120 UMS) 33%

Medium (60-63 for 120 UMS) 50%

Hard (57-59 for 120 UMS)14%

Total votes: 107

silentlife

I've been searching around and there seem to be no discussion on this. So here goes...

Just to start off, here is the Jan 12 paper. Good luck everyone :smile:

AQA-PHYA2-QP-Jan12.pdf833.0KB

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Reply 1

aerf

Hello, just wondering looking at the specification, has your teacher mentioned anything about w=Fscostheta, cause I haven't been told anything about it. Good luck to you also :biggrin:

Reply 2

silentlife

Original post by aerf

Hello, just wondering looking at the specification, has your teacher mentioned anything about w=Fscostheta, cause I haven't been told anything about it. Good luck to you also :biggrin:

Are you talking about resolving forcing? In which case is in the syllabus. You can resolve forces in x direction of a force and apply W=Fd/Fs to get w=Fscostheta. Hope that helps.

Reply 3

aerf

Original post by silentlife

Are you talking about resolving forcing? In which case is in the syllabus. You can resolve forces in x direction of a force and apply W=Fd/Fs to get w=Fscostheta. Hope that helps.

Yeah I've got it, we've only touched on W=fd. Bit naughty of our teacher if I'm honest. What do you think of the January paper?

Reply 4

Frodo Baggins

I got 45/70 in unit 2 but 65/70 in unit 1

What would 45/70 actually be as a grade?

Reply 5

aerf

That would have been 89 UMS, so a B. Assuming you did the paper this January

Reply 6

silentlife

The grading system is messed up for ums check this page to convert raw marks to ums from past papers, http://web.aqa.org.uk/over/stat_ums.php

Reply 7

silentlife

I'm slightly stuck on describing double slit experiment for white light :frown:

any help please....

Reply 8

aerf

Ahhhh, I'll have a go. The central (bright) fringe would be white. The side fringes are continuous spectra (ie rainbow) because white light is made up of many different frequencies. So fringes would be blue nearest the centre and red on the side away from the centre. Hope that's enough.

Reply 9

hully03

Hi everyone
Good luck with your unit 2 examination.
If you don't do as well as you hoped, there's always next year to re-sit. I wish I'd studied a ton more in As, I got an E in this exam last summer but I resat and got an A in January. Trust me, it's worth putting the effort in early :smile:

Reply 10

silentlife

Original post by hully03

Nice

The down side for us though, is that exams are certificate (unis know our bad results) :frown:

(edited 11 years ago)

Reply 11

silentlife

Original post by aerf

I don't get the thing though about colours merging at the sides though :s-smilie:

(edited 11 years ago)

Reply 12

hully03

Original post by silentlife

Nice

The down side for us though is that we have to certificate are exams (unis know our bad results) :frown:

Thanks

Yes, that is a bummer, I even had to put a U in maths in (I seriously wasted Y12) but it didn't appear to have too much of a detrimental affect on uni offers (highest offer conditional ABB from UEA - Computer science) Don't rely on this though as you might not get the same luck :P

Reply 13

aerf

Original post by hully03

Thanks

good luck with your exams this summer also!

Original post by silentlife

I don't get thing about colours merging at the side though :s-smilie:

I have no idea why that happens if I'm honest and I'm not sure if we need to know. Surely a google search could explain it though

Reply 14

Cimo-Simo

Does anyone have the markscheme i have to check if i got my answers right?

Reply 15

Mystic Creature

Waves is soo hard :frown:

mechanics i think ive got covered, and optics look okayish. I guess its time for serious revision mode.

Reply 16

silentlife

Yeah waves is messed up. Here is a list of topics on waves I have:
stationary waves,
polarization,
linear superposition,
Young's double slit,
and diffraction gratings,
and waves in general like amplitude and difference between transverse and longitudinal.

Have I missed out any?

Anybody got any suggestion for question they would ask about stationary waves, superposition and polarization?

Reply 17

aerf

Why do they use the single slit before the double slits when doing Young's experiment?

Reply 18

silentlife

Original post by aerf

Why do they use the single slit before the double slits when doing Young's experiment?

To produce a small source of light reducing smearing because a light bulb is not coherent. No such problem with laser.

I think that's the reason. :smile:

Any corrections?

Reply 19

vVShabbaVv

I've spent much more time on all the suvat equations jazz. I know zilch about waves. I panicked so i'm hiring a private tutor to help me out as i feel like i'm still learning it, plenty of time left :eek: