This discussion is closed.
smith50
Badges: 6
Rep:
?
#1
Report Thread starter 5 years ago
#1
Hi everyone how is everyone preparing for the Unit 4 just thought to get the discussion going all in one place


Examstyle answer
http://www.thestudentroom.co.uk/atta...0&d=1351094611
http://www.thestudentroom.co.uk/atta...1&d=1351094611
http://www.thestudentroom.co.uk/atta...2&d=1351094611
http://www.thestudentroom.co.uk/atta...3&d=1351094611
http://www.thestudentroom.co.uk/atta...4&d=1351094611
http://www.thestudentroom.co.uk/atta...5&d=1351094611
http://www.thestudentroom.co.uk/atta...6&d=1351094611
http://www.thestudentroom.co.uk/atta...7&d=1351094611
http://www.thestudentroom.co.uk/atta...8&d=1351094611
0
Photovoltaic
Badges: 0
Rep:
?
#2
Report 5 years ago
#2
I feel like I've got a fair bit of work to do but looking more like I could do fairly well now, more confident in this then in the unit 5 which I need to prepare for much more.

I've been looking through the content and going over some of the topics I'm less confident with using a combination of the CGP revision guide and the Nelson Thornes textbook and doing past papers. Feel like I've not done this enough as I've got so many other exams I need to prepare for too
0
Dezza1994
Badges: 0
Rep:
?
#3
Report 5 years ago
#3
Can someone kindly explain to me how to work out an exam question. AQA PHYA4 Jan 2013 section A Question 10. Why is the answer B ????
0
MTennison
Badges: 0
Rep:
?
#4
Report 5 years ago
#4
(Original post by Dezza1994)
Can someone kindly explain to me how to work out an exam question. AQA PHYA4 Jan 2013 section A Question 10. Why is the answer B ????
The answer is C:

And my working for the question is below.

Attached files
0
matt_spooner
Badges: 0
Rep:
?
#5
Report 5 years ago
#5
(Original post by Dezza1994)
Can someone kindly explain to me how to work out an exam question. AQA PHYA4 Jan 2013 section A Question 10. Why is the answer B ????
According to the markscheme, the answer is C

You know the forces acting on the small mass are equal so you can form an equation with them, I'm calling the small mass 'm' and the other two M1 and M2. The distance from M1 to m is r1, and the distance from M2 to m is r2.

(GxM1xm)/(r1)^2 = (GxM2xm)/(r2)^2


Cancelling 'm's and 'G's you are left with:

M1/(r1)^2 = M2/(r2)^2

M1/M2 = (r1)^2/(r2)^2

SQRT(M1/M2) = r1/r2

which is option C
0
matt_spooner
Badges: 0
Rep:
?
#6
Report 5 years ago
#6
(Original post by MTennison)
The answer is C:

And my working for the question is below.


uploading a picture was much easier than my way
0
Bow Tie
Badges: 14
Rep:
?
#7
Report 5 years ago
#7
Hello all, next exam is this paper, should be fine eh? Strange though because it's worth the same amount as the unit 5 (20%).
0
cem101
Badges: 11
Rep:
?
#8
Report 5 years ago
#8
I saw a question saying there were two parallel plates with pd of +3V and +1V but the field was positive to negative. I put the answer as if it were a field which was two positive point charges, why is this not the case? is it just because +1v is negative in comparison to +3V? does this mean that its always like this unless both pd's are equal?
0
smith50
Badges: 6
Rep:
?
#9
Report Thread starter 5 years ago
#9
(Original post by cem101)
I saw a question saying there were two parallel plates with pd of +3V and +1V but the field was positive to negative. I put the answer as if it were a field which was two positive point charges, why is this not the case? is it just because +1v is negative in comparison to +3V? does this mean that its always like this unless both pd's are equal?
Would you mind posting the question it will be clear that way.
0
Bow Tie
Badges: 14
Rep:
?
#10
Report 5 years ago
#10
(Original post by cem101)
I saw a question saying there were two parallel plates with pd of +3V and +1V but the field was positive to negative. I put the answer as if it were a field which was two positive point charges, why is this not the case? is it just because +1v is negative in comparison to +3V? does this mean that its always like this unless both pd's are equal?
I think I get what you're saying. The field flows from the MOST POSITIVE to the MOST NEGATIVE. Here being from 3v to 1v. The field strength being (3-1)/d.
1
cem101
Badges: 11
Rep:
?
#11
Report 5 years ago
#11
the papers seem to get harder as the years go on, i have a feeling this one will be very tough.
0
ashraf549
Badges: 8
Rep:
?
#12
Report 5 years ago
#12
I have simple question what happens to a charged particle/conductor when parallel to an electric field lines, and the same when they are parallel to magnetic field lines/ flux
0
ashraf549
Badges: 8
Rep:
?
#13
Report 5 years ago
#13
Probably the hardest Multiple-choice that I will ever do.
0
YOOZERNAYME
Badges: 0
Rep:
?
#14
Report 5 years ago
#14
omg guys I just did the June 2013 multiple choice section (which is about 45 minutes) and I did it in 30 minutes and got 21/25!!!! THIS IS A MIRACLEEEEEEE :happy2::groovy:
0
AstusUK
Badges: 0
Rep:
?
#15
Report 5 years ago
#15
(Original post by YOOZERNAYME)
omg guys I just did the June 2013 multiple choice section (which is about 45 minutes) and I did it in 30 minutes and got 21/25!!!! THIS IS A MIRACLEEEEEEE :happy2::groovy:
I seem to average around 20... I only seem to lose marks to the 4 statement type questions... :s
0
YOOZERNAYME
Badges: 0
Rep:
?
#16
Report 5 years ago
#16
(Original post by AstusUK)
I seem to average around 20... I only seem to lose marks to the 4 statement type questions... :s
yeah those statement ones are horrible!

I'm just so happy because my teacher is pretty awful and doesn't turn up to the lessons often so I usually rely on the nice people of TSR for help. So its a miracle without a teacher!! haha
0
DarkPortus
Badges: 0
Rep:
?
#17
Report 5 years ago
#17
Can someone explain to me how to get the correct answer for AQA physics b june 2013 question 3)b)iv) please?
paper: http://filestore.aqa.org.uk/subjects...4-QP-JUN13.PDF
Mark scheme: http://filestore.aqa.org.uk/subjects...W-MS-JUN13.PDF
thanks in advance, ps the exam is tomorrow so it's quite desperate.
0
AstusUK
Badges: 0
Rep:
?
#18
Report 5 years ago
#18
(Original post by YOOZERNAYME)
yeah those statement ones are horrible!

I'm just so happy because my teacher is pretty awful and doesn't turn up to the lessons often so I usually rely on the nice people of TSR for help. So its a miracle without a teacher!! haha
I stopped relying on my teacher a long time ago. I would ask him something i didn't understand and it was a coin toss whether he could give me the answer or not.
0
YOOZERNAYME
Badges: 0
Rep:
?
#19
Report 5 years ago
#19
(Original post by AstusUK)
I stopped relying on my teacher a long time ago. I would ask him something i didn't understand and it was a coin toss whether he could give me the answer or not.
exactly! I don't understand why they expect us to do the exams when the schools can't even employ professionals who know the topic themselves...
0
Dezza1994
Badges: 0
Rep:
?
#20
Report 5 years ago
#20
any one know how to do June 2012 section A Q2? Is there a link between momentum and kinetic energy? ???
0
X
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • University of East Anglia
    PGCE Open day Postgraduate
    Tue, 3 Mar '20
  • University of Bradford
    Postgraduate Open day/Evening Postgraduate
    Tue, 3 Mar '20
  • Queen's University Belfast
    Postgraduate LIVE Masters & PhD Study Fair Postgraduate
    Wed, 4 Mar '20

Do you get study leave?

Yes- I like it (499)
59.76%
Yes- I don't like it (43)
5.15%
No- I want it (237)
28.38%
No- I don't want it (56)
6.71%

Watched Threads

View All