AQA Physics PHYA4 - Thursday 11th June 2015 [Exam Discussion Thread]

So I was looking at the grade boundaries. On a practice paper I got 38/50 for the written paper and 17/25 for the multiple choice (these are first attempts). That gives me 55/75, where an A is 53 marks. All fine and dandy.

But then why does it say in the grade boundary page, that 34/50 is an A for the written paper. Does this have any significance at all?

So I was looking at the grade boundaries. On a practice paper I got 38/50 for the written paper and 17/25 for the multiple choice (these are first attempts). That gives me 55/75, where an A is 53 marks. All fine and dandy.

But then why does it say in the grade boundary page, that 34/50 is an A for the written paper. Does this have any significance at all?

19 - this is mostly a look at your formula sheet question!
A. C = Q/V, so this is correct
B. There are two charged parallel plates, so there is a uniform field - correct.
C. Q = CV - it is directly proportional, so this is incorrect and the answer you want!
D. E = 0.5CV² so this is also correct.

Question 15:
• Energy is transferred when movement is parallel or perpendicular to field lines for gravitational and electric fields.

• The overall energy transferred only depends on the start and finish points of a particular path followed by a charge/mass. It is independent of the path followed.

• In other words, for example, you can move an object away from and towards Earth as many times as you want, but the overall work done only depends on the distance between the start and finish points. Each time you move the object away from Earth, work is done. Each time you move it back towards earth, energy is released. But the overall energy transferred is the only dependent on the distance moved between the start and finish points. Energy is always conserved but just transferred from one form to another.

Question 19:
• The capacitance, C, of a capacitor is defined as:
$[br]C = \dfrac{Q}{V}[br]$

Or in words as the "charge stored per unit potential difference applied across two plates". So A is true.

• A uniform potential difference exists between the two plates. As such, a uniform electric field exists between the two plates. B is also true.

• The energy stored on a capacitor is:
$[br]E = \dfrac{1}{2} CV^2[br]$

So D is true.

• HOWEVER, rearranging the equation for capacitance:
$[br]Q = CV[br]$

So C is incorrect.


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Thank you guys! I would have repped you but apparently I need to rep other people first

I had a complete oversight with question 19 I was having one of those moments haha! But explained very well nonetheless

What are people averaging on their tests for PH4?


My average mark for written paper has been around say 36/50 and for the multiple choice it's been 17/25

What are people averaging on their tests for PH4?


My average mark for written paper has been around say 36/50 and for the multiple choice it's been 17/25

Just glad it makes sense now! Really need to prioritise PHYA4 soon but I've got 3 exams before that :L


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I want to make this clear -

If you want an A or A* you must get the correct grade for both the written and the MC. If you got A lot more on the written (enough for an OVERALL A) but the MC didn't surpass 19/20 (whatever the A MC boundary is) You will not get the full A.

I am aiming for an A*, I will do the MC first because I feel like I go through it faster than 45 Minutes making each mark I attain more time efficient and since I feel like I do better on MC psychologically I will feel better going into the written knowing (or thinking lol) that I've completed the MC to a good standard. A lot of people say you should do the written first but that's just down to personal preference.

I'm 100% sure this paper will be as difficult as the 2014 paper. Happy revising everyone!

Woah I never knew this. Pressures on


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Yah just when you thought it wouldn't get any worse.

What did you think of the 2014 paper?

I want to make this clear -

If you want an A or A* you must get the correct grade for both the written and the MC. If you got A lot more on the written (enough for an OVERALL A) but the MC didn't surpass 19/20 (whatever the A MC boundary is) You will not get the full A.

I am aiming for an A*, I will do the MC first because I feel like I go through it faster than 45 Minutes making each mark I attain more time efficient and since I feel like I do better on MC psychologically I will feel better going into the written knowing (or thinking lol) that I've completed the MC to a good standard. A lot of people say you should do the written first but that's just down to personal preference.

I'm 100% sure this paper will be as difficult as the 2014 paper. Happy revising everyone!

Averaging about 20 on multiple choice and 30 on written. Only trying to get a C/B though


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I need to scrape a B (84 UMS) on both papers to get into Uni, otherwise it's clearing for me

Also yeah, 1st time I did Jun 2014 this year I got 38/50 which isn't too bad at all (bearing in mind I got like only 1 mark from the 6 marker rofl)

But when I did it last year in the exam hall I thought it was painful. Tbh if you compare the 2014 paper to ones in the past, I think Jun12 is much harder

This is quite simply not true! It is only your overall mark for that paper that impacts what ums and therefore what grade you get