[Apocalyptic Fish]

I haven't seen a thread for this exam, is anyone sitting it? I'm writing some notes at the moment, then I'll do some past papers.

Anyone have any tips for this exam? Predictions of what's going to come up?

[Joshcad]

Check the units on the graphs.. Twice I've done this exam and twice i've fallen into that trap.

[Osl112]

I'm doing this tomorrow. However, I don't have a clue what to expect other than the obvious (resolution question, units question etc.)

[S_Azizi]

Retaking this exam also

I hate it.

[Yarpie]

It was alright. No complaints from me. Maybe the resistance with the temperature as I got 1100 and something but people got other things so ''shrugs''.

[mbutt94]

it was ****, as per every year.

[Osl112]

(Original post by Yarpie)
It was alright. No complaints from me. Maybe the resistance with the temperature as I got 1100 and something but people got other things so ''shrugs''.

No complaints either. Not as graphy as previous years, bit more explainy (and I waffled -.-), but otherwise it seemed ok.

I got 1350 for the resistance on that question though :s

[Apocalyptic Fish]

(Original post by Yarpie)
It was alright. No complaints from me. Maybe the resistance with the temperature as I got 1100 and something but people got other things so ''shrugs''.

Same. Generally, I think I did quite well but I spent too much time on some, so I moved on so I could finish it. Those were the emf calculation, one of the stress ones, the potential divider and the last two tennis ball questions. Compared to some of the past papers, It was quite easy.

[Yarpie]

(Original post by Apocalyptic Fish)
Same. Generally, I think I did quite well but I spent too much time on some, so I moved on so I could finish it. Those were the emf calculation, one of the stress ones, the potential divider and the last two tennis ball questions. Compared to some of the past papers, It was quite easy.

Grade boundaries could be quite high I think. I hope they aren't but we'll see in March.

[Apocalyptic Fish]

(Original post by Yarpie)
Grade boundaries could be quite high I think. I hope they aren't but we'll see in March.

Is it done by percentage or UMS? Roughly what would each grade be?

[emma3]

I probably shouldn't ask... but what did all of you get for the last question about tennis balls? I literally had a blank.. was it supposed to be about uncertainties?

[abarlas123]

What do you guys reckon grde boundaries will be realistically

[ed5663]

(Original post by emma3)
I probably shouldn't ask... but what did all of you get for the last question about tennis balls? I literally had a blank.. was it supposed to be about uncertainties?

it was .08 +1 pixels worth (your value for the one before) *magnification

[KING2011BOB]

I reckon that was a relatively hard exam,section A personally was very easy.But the tennis ball question was very hard(I think somehow I got the above answer of timising 0.08 by the mag,but the last bit about maximums I just had no clue..

The resistance question above I got 511 ohms and I messed up a lot of the definitions,hoping for a B-I do think the grade boundaries should be lower,this was similar to jan 2011 in my opinion in difficulty-43 for an A?

Anyone else remember any of the questions which were challenging?

[Joel R]

Not sure about the question: which has the greatest effect on the resistivity? uncertainty question...wasn't sure whether it was L (largest uncertainty) or D (largest percentage uncertainty :/

[KING2011BOB]

Yeah same see I put D^2 thinking that squaring an answer will make the answer a lot less accurate,put I don't think im right,its the one with the most uncertainty in % so thats a good 3 marks dropped

[Darkphilosopher]

(Original post by Joel R)
Not sure about the question: which has the greatest effect on the resistivity? uncertainty question...wasn't sure whether it was L (largest uncertainty) or D (largest percentage uncertainty :/

I put D because of the largest %.

[anonymouspie227]

hey, i found it okay, dropped stupid marks but, i was supprised to see the pressure unit- that hadn't come up at all when our teacher taught us. I put Pa though?

[Jordy2212]

Hey, Yeh I also found it went well, but I did find the resistance question and the tennis ball question tricky. The resistance question said there was 6V across the fixed resistor which confused me, as the EMF was 6V?? I ended up getting 500 Ohms for the answer.

Also for the final questions about the comparison of ceramics and plastics, did you get for the first part because plastic would melt under the high temperature in the lamp, and for the 2nd because plastics are much more ductile??

Hopefully A boundary around 42/60

[KING2011BOB]

See for the EMF q you had to use the graph to find what voltage you get at 70 degrees-3.7 v so you need 2.3 v across the other resistor
The 800=69% of the voltage so I did 800/69 * 39 = 511 ohms

I think around 41-42 marks for an A is reasonable for this paper tbh