PHYSICS PAPER 2 HELP and NOTES

[Evolution]

everyone please put some notes in here, and add your questions, so that you can get help, the exam's 2 days away so be quick

 

[Evolution]

here's this as a start
http://website.braunton.devon.sch.uk/downloads/P2 Revision notes.pdf
and this is electricity http://physics.info/charge/summary.shtml

 

[simim]

can sum1 explain me how to do question 14b from january 2012 asap

 

[xIshtar]

can sum1 explain me how to do question 14b from january 2012 asap

Uhh. I can tell you the way I did it, but it is a bit backwards.

As we know the reading on V1 is 4V, and the resistance is 10 Mega Ohms, or 1 x 10^7 Ohms.

Using V=IR you can find the current, which is 4 x 10^-7 A.

Then, using V=IR again, the second voltage being 2V, the resistance of the parallel combination is 2 /(4 x 10^-7) Which is 5 Mega Ohms.

Then, using the parallel combination of 1/R = 1/R1 + 1/R2 You will say that 1/(5 x 10^6) = 1/R1 + 1/(1 x 10^7)

Thus leading you to R1 = 1 x 10^7 Ohms, or 10 Mega Ohms.

Hope I helped in some way, I don't really know the way they expected you to work through this

 

[Evolution]

guys who has the jan 2012 qp and ms, can any1 post it here?

 

[xIshtar]

guys who has the jan 2012 qp and ms, can any1 post it here?

It's stickied in the forums

 

[simim]

can sum1 gv me d ans to question 14 a from jan 2012 and Q16b AND q18C from jan 2012 too plz

 

[simim]

Uhh. I can tell you the way I did it, but it is a bit backwards.

As we know the reading on V1 is 4V, and the resistance is 10 Mega Ohms, or 1 x 10^7 Ohms.

Using V=IR you can find the current, which is 4 x 10^-7 A.

Then, using V=IR again, the second voltage being 2V, the resistance of the parallel combination is 2 /(4 x 10^-7) Which is 5 Mega Ohms.

Then, using the parallel combination of 1/R = 1/R1 + 1/R2 You will say that 1/(5 x 10^6) = 1/R1 + 1/(1 x 10^7)

Thus leading you to R1 = 1 x 10^7 Ohms, or 10 Mega Ohms.

Hope I helped in some way, I don't really know the way they expected you to work through this

thnx a lot..it was a great help ​

​

 

[Evolution]

It's stickied in the forums

I know lol, I was just too lazy to get it.
Anyways here it is for anyone else who needs them
http://www.mediafire.com/?5u3nemc2qd3qx
phys unit 2 qp, ms, and er

 

[the golden girl]

here's this as a start
http://website.braunton.devon.sch.uk/downloads/P2 Revision notes.pdf
and this is electricity http://physics.info/charge/summary.shtml

do u have the same for Physics unit 4 and 5 , please do share

 

[Evolution]

I just google, physics notes lol, and sure I'll try to find some more

 

[the golden girl]

^ same thing here , but that's like the BEST physics unit 2 I've ever come across that's why I'm keen to know if there is one for unit 4 and 5 ..thanks

 

[Evolution]

np, I'll be searching for something similar, and I'll post anything I find here, or perhaps I'll send it directly to you. Don't worry

 

[aniekan]

everyone please put some notes in here, and add your questions, so that you can get help, the exam's 2 days away so be quick

http://aniekanezekiel.wikispaces.com/