June 2011 G485-Fields, Particles and Frontiers of Physics Watch

In the looney bin
Badges: 0
Rep:
?
#861
Report 7 years ago
#861
(Original post by fwed1)
Not a bad paper. Slight mistake on OCRs part on the seperation of the plates with the electron going through. Distance changed from 0.05cm to 0.05m
Slight mistake meant i wasted 7-8 minutes on that stupid 2 mark question wondering why it wasnt working, meaning i missed a tiny bit later on.

Shouldn't be any mistakes at all
0
reply
Kalamari Dave
Badges: 0
Rep:
?
#862
Report 7 years ago
#862
How'd people find it??!?
I thought it went quite well, seeing as i started revising after 9 last night.
No horrible essay questions
I completely drew a blank at the point charges electric field question tho, i quickly scribbled down a field strength i reverse engineered from the force of attraction "expected answer"
0
reply
anshul96
Badges: 0
Rep:
?
#863
Report 7 years ago
#863
(Original post by turboweevil)
Also, I loved that mistake. Very funny OCR. Nice to see you care about this exam as much as me.
this.
0
reply
fwed1
Badges: 11
Rep:
?
#864
Report 7 years ago
#864
(Original post by In the looney bin)
Slight mistake meant i wasted 7-8 minutes on that stupid 2 mark question wondering why it wasnt working, meaning i missed a tiny bit later on.

Shouldn't be any mistakes at all
Surely your answer would have onl been off by a factor of 100?
0
reply
Oh my Ms. Coffey
Badges: 0
Rep:
?
#865
Report 7 years ago
#865
I got the force acting down - apparently this is wrong.

I think I might of accidently put the ratio as 1/3 not 3/1.

I also messed up some of the harder electricity stuff.


Electron acceleration I used EQ/M = a

Got nuclear density as something to the power ^17

Weird answers like 239.something for transformers.

Nuclear I used water as the moderator
1
reply
trapzbrah
Badges: 1
Rep:
?
#866
Report 7 years ago
#866
fuark that paper was hard!
0
reply
fwed1
Badges: 11
Rep:
?
#867
Report 7 years ago
#867
(Original post by Oh my Ms. Coffey)
I got the force acting down - apparently this is wrong.

I think I might of accidently put the ratio as 1/3 not 3/1.

I also messed up some of the harder electricity stuff.


Got nuclear density as something to the power ^17

Weird answers like 239.something for transformers.
I think I got all the same answers as you! haha
0
reply
anshul96
Badges: 0
Rep:
?
#868
Report 7 years ago
#868
some of my answers...anyone else agree?
q1: 219 turns on coil
q2: 5.0625 seconds and lots of 10^-4 answers...
q3: 4.18 x 10^7 for something
q4: LOLOLOL reverse engineered, 32700 but i think it's supposed to be 29500...
q5: 0.016 and then 4x10^-3
q6: 10^-17 for the density
q7: H0 was 2.1 x 10^-18 and pc was 7.87 x 10^-27
0
reply
ufochaffeuress
Badges: 0
Rep:
?
#869
Report 7 years ago
#869
I swear it's downwards! The switch was off!
0
reply
Oh my Ms. Coffey
Badges: 0
Rep:
?
#870
Report 7 years ago
#870
(Original post by anshul96)
some of my answers...anyone else agree?
q1: 219 turns on coil
q2: 5.0625 seconds and lots of 10^-4 answers...
q3: 4.18 x 10^7 for something
q4: LOLOLOL reverse engineered, 32700 but i think it's supposed to be 29500...
q5: 0.016 and then 4x10^-3
q6: 10^-17 for the density
q7: H0 was 2.1 x 10^-18 and pc was 7.87 x 10^-27
Sounds like mine.

What was Q4?
0
reply
In the looney bin
Badges: 0
Rep:
?
#871
Report 7 years ago
#871
Answers i remember:

Time taken for electron to reach point P = 1x10^-9 seconds.
P.D Across 150 micro-farad capacitor = 1.5.
Charge across 150 micro-farad capacitor like 2.25*10^-4 or something.
Ratio of capacitors i got 1/27 = 0.037. (I believe this to be wrong)

Angle in Q4 = 18.8 degrees.

Force (upwards) caused by magnetic field = 0.016N.
New reading on the balance scales = (2.5-0.016) = 2.484 N.

Hubble constant was like 2x10^-18 seconds^-1
Critical density of universe like 2x10^-27.

Density of uranium nucleus was large, cant remember what, my assumption was no seperation distance between nucleons.

Quote/reply if you disagree/agree with any and post what you remember!
0
reply
Oh my Ms. Coffey
Badges: 0
Rep:
?
#872
Report 7 years ago
#872
Also how many of you missed the back page out
0
reply
anshul96
Badges: 0
Rep:
?
#873
Report 7 years ago
#873
(Original post by Oh my Ms. Coffey)
Sounds like mine.

What was Q4?
Question 4 was the electric field strength one, i worked backwards from 1.5 x 10^-4
0
reply
Right Guard 3.D
Badges: 13
Rep:
?
#874
Report 7 years ago
#874
I thought it was a good exam.

I didn't do well on the vector diagram question or the one with the scales.

The last half of the paper was pretty good, lots of nice explaining questions, and the first half wasnt too bad, the calculations were slightly harder than previous times.
0
reply
Oh my Ms. Coffey
Badges: 0
Rep:
?
#875
Report 7 years ago
#875
(Original post by In the looney bin)
Answers i remember:

Time taken for electron to reach point P = 1x10^-9 seconds.
P.D Across 150 micro-farad capacitor = 1.5.
Charge across 150 micro-farad capacitor like 2.25*10^-4 or something.
Ratio of capacitors i got 1/27 = 0.037. (I believe this to be wrong)

Angle in Q4 = 18.8 degrees.

Force (upwards) caused by magnetic field = 0.016N.
New reading on the balance scales = (2.5-0.016) = 2.484 N.

Hubble constant was like 2x10^-18 seconds^-1
Critical density of universe like 2x10^-27.

Density of uranium nucleus was large, cant remember what, my assumption was no seperation distance between nucleons.

Quote/reply if you disagree/agree with any and post what you remember!
My assumption was the nucleon was treated as a sphere for volume.
0
reply
cleverbong
Badges: 0
Rep:
?
#876
Report 7 years ago
#876
(Original post by CapsLocke)
you're meant to use the right hand rule, the force was upwards.
Oh yeah! You are right! Sorry about that.
This means I got it right. Cos some of the class got the force upwards.
0
reply
XST
Badges: 0
Rep:
?
#877
Report 7 years ago
#877
Overall a really good exam! Easy to pick up lots of marks in the long written questions. Now I wonder if the grade boundaries will shoot up.
0
reply
yokabasha
Badges: 0
Rep:
?
#878
Report 7 years ago
#878
(Original post by CapsLocke)
you're meant to use the right hand rule, the force was upwards.
Nh it's LHR, cause there's current is already there, no induction, so force is acting downwards.
2
reply
In the looney bin
Badges: 0
Rep:
?
#879
Report 7 years ago
#879
(Original post by ufochaffeuress)
I swear it's downwards! The switch was off!
Switch was closed yes, force depends on wether the current was going clockwise (which would make it upwards) or anti-clockwise (which would make it downwards).
0
reply
Oh my Ms. Coffey
Badges: 0
Rep:
?
#880
Report 7 years ago
#880
(Original post by cleverbong)
Oh yeah! You are right! Sorry about that.
This means I got it right. Cos some of the class got the force upwards.
What is it meant to act down?
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
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

  • Cardiff Metropolitan University
    Undergraduate Open Day - Llandaff Campus Undergraduate
    Sat, 27 Apr '19
  • University of East Anglia
    Could you inspire the next generation? Find out more about becoming a Primary teacher with UEA… Postgraduate
    Sat, 27 Apr '19
  • Anglia Ruskin University
    Health, Education, Medicine and Social Care; Arts, Humanities and Social Sciences; Business and Law; Science and Engineering Undergraduate
    Sat, 27 Apr '19

Have you registered to vote?

Yes! (502)
37.86%
No - but I will (101)
7.62%
No - I don't want to (91)
6.86%
No - I can't vote (<18, not in UK, etc) (632)
47.66%

Watched Threads

View All