AQA A Physics Unit 4 24th Jan 2012

I thought overall the paper was harder than all the past papers i've done. The SHM question was a really weird one and i'm not too confident about question 4 but I think the rest of the paper and section A was alright.

Reply 581

CR650

Original post by TheJ0ker

I used v^2 = u^2 - 2as But both ways will work.

its +2as

Reply 582

Jhon

Paper went pretty well!
The 6 marker and the SHM question were a bit Iffy though :s

Erm, in section A. The question where you had 2 point charges and a length 60 mm away from each other.

I got the value of 48 mm which wasn't on any of the options available (highest one was 45mm)

I used two different methods, and both gave me 48 mm.
Anyone else have the same problem or was It just me screwing it up? :P

Reply 583

Nugard123

1

Original post by Jhon

Paper went pretty well!
The 6 marker and the SHM question were a bit Iffy though :s

Erm, in section A. The question where you had 2 point charges and a length 60 mm away from each other.

I got the value of 48 mm which wasn't on any of the options available (highest one was 45mm)

I used two different methods, and both gave me 48 mm.
Anyone else have the same problem or was It just me screwing it up? :P

I also got 48mm! So i just put 45mm because that's what was closest.

Reply 584

BlackPoison94

2

I hated it.

How did people do the electric field direction question?

Also, what did people do for the stress/fuse questions....and the last question?

Reply 585

BlackPoison94

2

Original post by Nugard123

I also got 48mm! So i just put 45mm because that's what was closest.

Well I thought that it was Q/r^2 and I got 40mm

I got 48mm first but then I saw that it was a radial field...

Reply 586

TheJ0ker

11

Original post by CR650

its +2as

Yeah my bad I changed it.

Reply 587

CR650

Original post by BlackPoison94

Well I thought that it was Q/r^2 and I got 40mm

I got 48mm first but then I saw that it was a radial field...

yup

Reply 588

Reminisce

11

Original post by BlackPoison94

Well I thought that it was Q/r^2 and I got 40mm

I got 48mm first but then I saw that it was a radial field...

I agree

Yeah it was field strength not potential.

Reply 589

LookIt'sPete

12

Original post by BlackPoison94

Well I thought that it was Q/r^2 and I got 40mm

I got 48mm first but then I saw that it was a radial field...

I got 40mm as well

6-marker was ok as my teacher went through that experiment in class

Overall, it wasn't too bad, there were some tricky questions though and I think I made quite a few silly errors.

But if the grade boundaries stay roughly the same, it should be fine :biggrin:

(edited 12 years ago)

Reply 590

TheJ0ker

11

Original post by Jhon

Paper went pretty well!
The 6 marker and the SHM question were a bit Iffy though :s

Erm, in section A. The question where you had 2 point charges and a length 60 mm away from each other.

I got the value of 48 mm which wasn't on any of the options available (highest one was 45mm)

I used two different methods, and both gave me 48 mm.
Anyone else have the same problem or was It just me screwing it up? :P

The answer was 40mm, you knew it had to be closer to the smaller charge so if you calculate both strengths when the distance is 45mm they were not equal so it had to be 40mm.

Reply 591

Jhon

Well If it was 40mm :frown:

(((((((
Oh well, one mark :tongue:

Original post by TheJ0ker

The answer was 40mm, you knew it had to be closer to the smaller charge so if you calculate both strengths when the distance is 45mm they were not equal so it had to be 40mm.

I think I must've mis-read the question. I thought It was Electric potential Q/r

(edited 12 years ago)

Reply 592

vedderfan94

16

Original post by Nugard123

I thought overall the paper was harder than all the past papers i've done. The SHM question was a really weird one and i'm not too confident about question 4 but I think the rest of the paper and section A was alright.

You seem to be the only person on here who feels the way I do about this paper.

Reply 593

BlackPoison94

2

Original post by vedderfan94

You seem to be the only person on here who feels the way I do about this paper.

I feel exactly the same way :|

Reply 594

anil10100

I think it was fairly average compared to past papers. Section A and the first like 3 questions that were mainly calculations were probably slightly easier than usual, than the last few questions with all the explain bull**** was probably harder, just hoping I haven't dropped too many marks in the last question/s.

When it asked to prove something was 25, did anyone else get 27.8 then say it was approximately equal? Think I may have got that one wrong..

Reply 595

BlackPoison94

2

Original post by anil10100

I think it was fairly average compared to past papers. Section A and the first like 3 questions that were mainly calculations were probably slightly easier than usual, than the last few questions with all the explain bull**** was probably harder, just hoping I haven't dropped too many marks in the last question/s.

When it asked to prove something was 25, did anyone else get 27.8 then say it was approximately equal? Think I may have got that one wrong..