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AQA Physics PHYA4 - 20th June 2016 [Exam Discussion Thread]

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Original post by boyyo
@Protoxylic hey, I remember you from last year! Will you be putting up the unofficial mark scheme this year?


Unfortunately not, sorry. I'd imagine somebody else would.
Reply 81
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boyyo
6
Original post by Protoxylic
Unfortunately not, sorry. I'd imagine somebody else would.


Ohh ok thannks anyways
Reply 82
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cowie
7
How much of the syllabus has everyone covered so far?
(edited 8 years ago)
Where can I access old AQA Physics spec papers and mark schemes. Unit codes: PA02, PA04 and PHY8/W?


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Original post by ComradeLenin
Where can I access old AQA Physics spec papers and mark schemes. Unit codes: PA02, PA04 and PHY8/W?


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http://theallpapers.com/assessment-and-qualifications-alliance/a-level/

Scroll down and click Physics and it should be there.
Thank you.


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One thing I don't get about the time constant in the capacitors topic - I know that the time constant is the time taken for the charge on a discharging capacitor to fall to 37% (RC = 0.37 = e^-1), but why is this such a significant number? Like, what does this even represent?

The text books don't explain this to me
(edited 8 years ago)
Original post by kelvin1338
One thing I don't get about the time constant in the capacitors topic - I know that the time constant is the time taken for the charge on a discharging capacitor to fall to 37% (RC = 0.37 = e^-1), but why is this such a significant number? Like, what does this even represent?

The text books don't explain this to me


The time constant is the time it takes for the capitator's charge to drop by 37%. This value is always equal to the capacitance x resistance


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Reply 88
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boyyo
6
Is anyone struggling with EM induction?? :s-smilie:
How has everybody revised for this, have you made notes or have u done a ton of past papers since the questions repeat?
Original post by ryandaniels2015
How has everybody revised for this, have you made notes or have u done a ton of past papers since the questions repeat?


Both


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Original post by cosmicapple
Yep, they've been attached :biggrin:


Do you or anyone have the June 2015 empa papers (phya6x) with mark scheme. I'll give rep
Original post by Euclidean
Our teacher usually asks us to 'Describe an experiment to determine....' in his tests, and I suspect that these are past exam questions. Though I haven't yet looked at any past papers so I couldn't say for sure.

I think we could be asked to describe an experiment as a high mark question (4+) in the exam

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Won't they only ask about the required practicals, for this year? Are those the only practicals that can come up in the exam?
Can someone direct me to the PA04 Jan 2008 Paper B? I can't find it


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Original post by ComradeLenin
Can someone direct me to the PA04 Jan 2008 Paper B? I can't find it


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Here you go:

http://freeexampapers.com/index.php?option=com_content&view=article&id=1&Itemid=101&jsmallfib=1&dir=JSROOT/A-Level/Physics/AQA/Physics-A-2450/2008-Jan
Original post by TheLifelessRobot


Thank you!


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Anyone got the 2015 paper for this unit and unit 5?
Original post by Euclidean
AQA Physics PHYA4 - 20th June 2016
Official Exam Discussion Thread

Time: 09:00am
Duration: 1h 45m

:elefant::danceboy::elefant::danceboy::elefant::danceboy::elefant::danceboy::elefant::danceboy:

A thread for Physics 4 is long overdue, below I have listed a few links which I think may be useful for those sitting the exam this year:

Physics and Maths Tutor:
http://www.physicsandmathstutor.com

Old Specification Papers and Mark Schemes:
http://www.aqa.org.uk/subjects/science/as-and-a-level/physics-a-2450/past-papers-and-mark-schemes/old-past-papers-and-mark-schemes

Past Grade Boundaries:
phya4 boundaries.png

DrPhysicsA YouTube Videos:
https://www.youtube.com/user/DrPhysicsA

Other Useful YouTube Channels:
https://www.youtube.com/channel/UCkZ6jZF-9uxY86jKLU4Wqyw

A Level Physics Online Videos (Including ISA/EMPA Skills):
http://www.alevelphysicsonline.com/#!videos/c1p3t

People who may be interested in this thread:

Spoiler




Hello I have done some physics videos and other A level videos, could I be added to the list at the start ?

The link to my channel; https://www.youtube.com/channel/UCnU70eR4cFPSMNJD0RKnP6g/featured


I have done a few quite interesting videos recently, Anyway Brilliant thread ! Thanks for starting this !... I found it really helpful




Many thanks
Reply 98
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boyyo
6
Can anyone explain the differences between electric potential and electrical potential Energy

I get confused between potential and potential energy, I cant get my head around it. Any help appreciated, thanks :smile:
Reply 99
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Krollo
17
Original post by boyyo
Can anyone explain the differences between electric potential and electrical potential Energy

I get confused between potential and potential energy, I cant get my head around it. Any help appreciated, thanks :smile:


Electric potential is a property just of a field itself, whereas electric potential energy is a combined property of a field, a charge, and its position.

You should know that the electrical potential energy E is equal to the charge Q times the potential V. The potential is, if you like, a more general form of energy - if you find it for a point in a field, then you can find the electrical potential energy for any charge at that point without much trouble at all.

I've probably just made it even less clear :-P

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