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

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Reply 520

justalawyer1998

Any help? http://www.thestudentroom.co.uk/showthread.php?p=65908534&highlight=

Reply 521

justalawyer1998

Original post by particlestudent

It does matter, this one was a positive ion though so you can use the left hand rule without any alterations. E.g. An electron moving vertically down has to be treated as a positive charge moving vertically up. :smile:

...it does matter then. If it's an electron your current finger should be in the opposite direction to the electron's velocity

Reply 522

Matt Johnson

Hi,
Does anybody know any good resources for the 6 markers, some model answers for the topics that could come up would be nice as I struggle quite alot with them
thanks

Reply 523

rich1334

Original post by Nikhilm

True. How would an increase in the angle between plane of coil and field give a larger emf though? Because an increase could be anything, e.g. 35 degrees, and hence would always be less than 1 for costheta or sintheta

Parallel to the field you're not going to cut much flux per second but if you had it at an angle you could cut more flux

Reply 524

Lychee628

Original post by particlestudent

Sorry my bad I'm half dead, Q/C- should still give you the same proportion :biggrin:

....
luckily

Haha yepp

Reply 525

Yo12345

Need to smash the MC - got 23 on June 12 and 21 on Jan 13. What does the MC answer sheet look like because there's an extra sheet isn't there besides the section A question paper?

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Reply 526

Cheesecake Ali

ImageUploadedByStudent Room1466291867.796616.jpg

Helpplease

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Reply 527

C0balt

I'm starting to feel the panic slowly kick in lol
I've neglected physics for so long since my interview, and when I realised it was already 2 days before the exam lmao fml

Reply 528

Yo12345

Original post by C0balt

I'm starting to feel the panic slowly kick in lol
I've neglected physics for so long since my interview, and when I realised it was already 2 days before the exam lmao fml

Don't worry too much. If anything, focus and try and ace the multiple choice as there's lot of practice from old spec too

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Reply 529

C0balt

Original post by Yo12345

Don't worry too much. If anything, focus and try and ace the multiple choice as there's lot of practice from old spec too

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I've consistently got 23 or so in my past papers but it's been so long since I last did MCQ, I'll need to do some tomorrow to get some speed back I guess

Reply 530

Mattematics

Original post by Cheesecake Ali

Helpplease

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You can calculate the energy stored by the capacitor.

Power is energy divided by time.

Reply 531

Exams987

anyone know what is likely to be the 6 marker?

Reply 532

Cheesecake Ali

Original post by Mattematics

You can calculate the energy stored by the capacitor.

Power is energy divided by time.

Thank you

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Reply 533

blueberry389

can someone please help me with MCQ Q7 of Jun 2015? is it really necessary to calculate l before we could find the final answer?

and also MCQ Q18 of Jun 2015

THANKS

(edited 7 years ago)

Reply 534

WillRose

Original post by blueberry389

can someone please help me with MCQ Q7 of Jun 2015? is it really necessary to calculate l before we could find the final answer?

and also MCQ Q18 of Jun 2015

THANKS

Q7 no you just divide the 1.42 time by root 0.37

Q18 work out the resistance using v=ir
then use the v=v(0)e^-t/rc
with 4.5 as v and 5 as v(0) because o the 10% thing, then rearrange for t :smile:

Reply 535

Patrick Gekko

Quite a basic question but always forget, if you put a charge in an electric field parallel to the field lines, will it be affected?

Reply 536

mohdstudent

Original post by Patrick Gekko

Quite a basic question but always forget, if you put a charge in an electric field parallel to the field lines, will it be affected?

Watch minute 12:15 of https://www.youtube.com/watch?v=Dc8Vay7mRss&index=18&list=PL5D99A319E129A5B7

Basically if you put a charged particle in an Electric field it will move towards its opposite charge (so an electron will move towards the positive terminal)

However if you put a charged particle in a magnetic field nothing will happen.

Hope this helps.

Reply 537