G485 physics questions from Cambridge paper

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Original post by speed1✈️✈️

Mate don't *urge* everyone to do it, you'l raise the grade boundaries as people will do better, making it harder for you to get your grade! :tongue:

Remember OCR wants a finite number of people getting particular grades, regardless if people are cleverer or not. OCR are cheaky I know but they are still not a joke, they can easily screw us over in the next paper.

But yeah, that's just selfish and makes you sounds like a c**t.

Reply 21

jackf9283

2015 paper
https://drive.google.com/folderview?id=0B989KkRnVfa7NW50NXdzTllLc1U&usp=drive_web

Reply 22

FrenziedCoot

Original post by Reda2

As it takes long for me to upload these, I will post 2 here, and if you want the other topics let me know. I hope they help.

Radioactivity: http://www.mediafire.com/download/46kbxscrgp79xk4/Key_Notes_-_Radioactivity.pdf

Nuclear Physics: http://www.mediafire.com/download/gyqzuqs192s725l/Key_Notes_-_Nuclear_Physics.pdf

Hi,
These are really helpful, is there any chance you have Capacitors notes?
I'm pretty bad at that part of the course :frown:

Reply 23

Reda2

Original post by FrenziedCoot

Hi,
These are really helpful, is there any chance you have Capacitors notes?
I'm pretty bad at that part of the course :frown:

Glad they helped.

Capacitors one: http://www.mediafire.com/download/ic70szc711b2bcf/Key_Notes_-_Capacitors.pdf

Main thing about capacitors is to understand that the charge is shared equally between them when they are in parallel, and that the charge for each capacitor is the same when in series. If you understand this deeply, you will be good.

Reply 24

QuantumSylar

Original post by Reda2

yh that's very true and the p.d is shared in series right?

Reply 25

Reda2

Original post by QuantumSylar

yh that's very true and the p.d is shared in series right?

Yes exactly, just like any circuit for the p.d.

Reply 26

QuantumSylar

Original post by Reda2

Yes exactly, just like any circuit for the p.d.

since current is the third thing would it be like charge i haven't seen anything on it yet

Reply 27

Reda2

Original post by QuantumSylar

since current is the third thing would it be like charge i haven't seen anything on it yet

What do you mean, current is the third thing?

Reply 28

QuantumSylar

Original post by Reda2

What do you mean, current is the third thing?

i mean cuz with capacitors u have voltage, charge and current as the main things that change( u know with the graphs), apart from capacitence

Reply 29

QuantumSylar

Original post by QuantumSylar

i mean cuz with capacitors u have voltage, charge and current as the main things that change( u know with the graphs), apart from capacitence

nvm just seen it, current is like charge in the way it is shared too

Reply 30

Reda2

Original post by QuantumSylar

nvm just seen it, current is like charge in the way it is shared too

Well current is due to the movement of charged particles, so current is charge.
That is why in series they have same charge because the current is the same in the series circuit which basically the charge. And since the current is shared in parallel that is why the charges of the capacitors are shared.