Exam Discussion!

[NathanGauci]

Did anyone notice the projectile motion question which was almost identical to a previous exam one?

Edit:the 2008 one.

[KayKay]

Anyone do the sound detailed study and remember what they got for the resonance questions?

100Hz and 150Hz

[the_analyser]

Does anyone remember what they got for the resistance of the wires in the coil? Part of the power section

[KayKay]

Also for the max speed of mass spring question, I got 2m/s but I think my working out was wrong. I did elastic potential energy is converted to kinetic energy.

So from the previous question, I got x=0.4m
Then, calculated the Spring potential energy with 1/2kx2
Then made that equal to kinetic energy and solved for v
Got v=2m/s
No marks or?

Mm not too sure. Well the previous question the answer was 0.8 m. For the next one though... if you're lucky and the examiner isn't paying attention to working out you might get full marks, but otherwise 1/3 because 1 for answer and 2 for explanation.

[Sono69]

100Hz and 150Hz

Damn I think I got 50Hz and 100Hz

[S61778]

Mm not too sure. Well the previous question the answer was 0.8 m. For the next one though... if you're lucky and the examiner isn't paying attention to working out you might get full marks, but otherwise 1/3 because 1 for answer and 2 for explanation.

Hope I'm lucky, in fact I've been told by teachers, one I think is close in rank to the chief assessor, that it's full marks if the answer in the box is correct. She even said that if it says 'show your working' it's full marks if the answer in the box is right...but not too sure on this

[patel.aayush]

Hope I'm lucky, in fact I've been told by teachers, one I think is close in rank to the chief assessor, that it's full marks if the answer in the box is correct. She even said that if it says 'show your working' it's full marks if the answer in the box is right...but not too sure on this

its full marks if u get the ans right if it doesnt say show your working, if it does u have show working

btw did anyone do synchrotron? I got A A B D A C B D B C C

[Jnf17]

Hope I'm lucky, in fact I've been told by teachers, one I think is close in rank to the chief assessor, that it's full marks if the answer in the box is correct. She even said that if it says 'show your working' it's full marks if the answer in the box is right...but not too sure on this

Can't exactly remember what I have heard about physics but I thought the sciences and maths (methods anyway) had designated method and answer marks? Like I didn't think you could get full marks on a physics question with only an answer in the box with no working?

[Sono69]

Can't exactly remember what I have heard about physics but I thought the sciences and maths (methods anyway) had designated method and answer marks? Like I didn't think you could get full marks on a physics question with only an answer in the box with no working?

That's my understanding of it as well

[chuck981996]

For the 1V photodiode one I think I got a resistance of 187.5ohm... :/

Oh yeah that sounds right! I think I got that. I think 20Ω was for the coil.

I got 187.5 as well, to find voltage across it was 1.3-1 or something similar

Yeah we were given the current, and voltage was 0.3 so you just used ohm's law I think. That sounds right.

I think i put 625ohm

The photodiode produces a current, not a voltage.

[d4m0]

yes i got 26V as well

okay this is making me feel better than how i did getting out of the exams

I filled a page making it more complicated then it really was and then right in the last two minutes I did it really quickly and got 26V yay

[shroomer101]

What do you think the cut off will be this year?? lower than last years or around the same?

[chuck981996]

mc answers for materials and structures

a,b,c,d,a,c,b,b,c,d,a

I got a,c,c,d,a,b,b,a,b,d,d…

[thanman123]

its full marks if u get the ans right if it doesnt say show your working, if it does u have show working

btw did anyone do synchrotron? I got A A B D A C B D B C C

I got D for 10, which is probably wrong, but I got the same for everything else.

[the_analyser]

Oh yeah that sounds right! I think I got that. I think 20Ω was for the coil.

Yeah we were given the current, and voltage was 0.3 so you just used ohm's law I think. That sounds right.

The photodiode produces a current, not a voltage.

Yep, 20 ohm sounds good, thanks for the feedback