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# ► CSIR UGC NET, 2011 December 18, Question Paper, Download, Key, Answers, solutions, Explanations, Comment Here

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UGC CSIR NET 2011 December 18 Answer Key Comment here with explanation

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1. CHANDRA PRAKASH VERMA........
CSIR NET PHYSICAL SCIENCE
booklet co. A
Qu.1.2
2.4
3.2
4.
5.2
6.3
7.
8.
9.
10.
11.2
12.4
13.4
14.1
15.
16.3
17
18.4
19
20
21
22
23.3
24
25.3
26
27.4
28.1
29.1
30.
31.1
32
33
34.3
35.2
36.4
37.1
38.
39.2
40.3
41
42
43.2
44.2
45
46.2
47.4
48.4
49.
50.2
51.1
52
53
54.1
55
56
57.4
58.2
59.4
60.2
61.1
62.3
63
64.4
65
66
67.2
68.1
69.
70.1
71.3
72.3
73.
74.4
75.

2. Booklet Code A...
Q No: 7
answer is 1. Bcoz Dune sand has 100% cumulative for narrow size.

3. Q No: 34
Reason take reduced mass of positron and electron, Mass=m/2

4. Q No: 28
refere any classical mechanics book.

5. Q No: 14
just check it.

6. Please give me reasons for ur key.( at least for part-B and part-C)
Thank u.

7. thank you very much sir

8. booklet code B?

9. Mr Chandra is this relayable or u just show what u have attemp. I want to know as I also got Booklet A.

10. please upload thequestion paper also. then it will be useful to all sets

11. can anyone post Chemical sciences answers

12. post booklet A so that we can compare answers with our booklets

13. question no 43 correct ans is (1) because there is no feedback fron -ve arm so no voltage drop. so the voltage at point A will be same as the input to -ve arm

Question no 28 correct ans is (2)

Question no 31 correct ans is either (3)or (4) plese refer to polarizer puzzle

the above all questions are for booklet code A

14. Somebody give ans for c series
giving qns
part A

1. oxidation of alcohol
2. sun blackhole ans: 4. no plns
3. animal mod legs ans 4. butterfly
4. droplets of herbicide
5.min no of cards ans: 4. 5
6. two bladed fan and s bullet
7. jar cont iron blk ans: 3. rem same
8. room wind prev heat
9.poly peptide 300 amino acids
10. bubbling air thr water ans: 2. co2
11. disruption of air trafic ans : 1. engine damage
12. segment of circle ans: 2 85deg
13. 3 boys kicked balls
14. swinging door
15. most abundant ele in human body
16. fig sedement size
17. no sys 0,2,3,4,5 ans: 3. 11
18. absolute water cont equitorial rgn
19 detergent mole ans: 3.
20 parents blood groups ans: 4. o and B

15. Ugc net physics series c dec 2011
give ans key
qns
part B
21. Legendre polinomials
22. op amp voltage
23. potential of diatomic molecule
24. particle in one dim potential v(x)= v(-x)
25. point particle of mass m carry ele chrge q
26. double pendulam
27. 4 equal point charges
28. youngs double slit interference expt
29. flip flop
30. force F appld to particle of mass m
31. maxwellian distributio of velocity
32. battery powers two ckts
33. two particles of identical mass move circular orbit
34. internal energy e of a sys
35. system of N noninteracting spin particles
36. perturbation H'=bx4
37 three polarizers p1,p2,p3
38 no density of free e gas
39 pin 0,1,2,3,4 of microprocessor
40. unbiased dice is trown
41. Energy of first excited quantum
42. eqn of plane xyz= 8
43. static charge distribution
44. 3* 3 matrix ans: 3. -1,3,4
45. GS Enegry of H atom -13.6ev

16. can anybody tell me keys of set c

17. Q.No.38
E=TdS-PdV
so T=diff(E) w.r.t S

18. Qus 15 ans is = Oxygen!

19. @cp verma lucknow
Everything CP Verman has given is wrong. He is misleading. DO not believe in those answers

20. Give answers to part C physics
46. voltage regulator zener diode
47. wavw functuion t=0 given orthogonal?
48. energy levels of es of mass m and charge e
49 a planet of mass m moves.. tot enrgy of planet?
50. shell model spin parity
ans : 4. 7/2 +, 7/2+
51. let x1(t) and x2(t) be two independend solns
52. gas molecules of mass m confined in cylinder
53. the excitations of a 3d solid are bosonic in nature
54. ratio of intensities D1 and D2 sodium
55. trajectory on the zpz-plane
56. difference of coulomb energy mirror nuclei
57. heater AND Thermocouple
58. solenoid of radius R with n turns
59. terms in taylor series
60. atom of mass M excited
61. a gas of N non interacting particles
62. onstant perturbation fig
63. free energy of a magnetic system
64. particle of mass m moves inside a bowl
65. the graph of the function f(x)= 1,0 LAPLACE transform
66. one dimensional chain consists N rods each length a
67. annulus of mass M inner and outer radii a,b
68. monochromatic light of wavelength 660nm
69. electron of energy 27 GeV collides proton
70. const elec current I infinit long wire
71. laser opeating 500 nm
72. valule of real integral
73. min energy of an e CERENKOV radiation
74. hyperfine interaction in an atom is given by H= aSe.Sp
75. Let |0> and |1> noprmalised eigen values

21. question 38 ans is 2
E=Tds-Pdv and if E is independent of T means there is no volume change. so dv=0. so final equation becomes E=Tds. now you can do

22. flip-flops...ans: (2) 0001

23. BATTERY POWERS TWO CKT, ERROR IN THE ESTIMATE OF I..ANS: (3) 5.0 mA

24. Q. 28- Answer 3 is correct.......

Booklet code A

25. Booklet Code A

1> 2
2> 4
3> 1
4> 3
5> 2
7> 2
9> 3
12> 4
14> 3
15> 3
17> 3
18> 4
20> 2
21> 2
22> 2
23> 3
24> 2
25> 1
27> 4
28> 3
30> 3
33> 1
37> 2
39> 1
40> 3
41> 3
42> 1
44> 2
48> 3
50> 2
53> 3
56> 3
58> 2
59> 2
60> 3
62> 2
63> 3
65> 3
68> 2
70> 3
71> 3
72> 4
74> 2
75> 4

26. ans 2 booklet code B
SEC B
Q21-POLARIZERS,ANS-3
Q22-DOUBLE PENDULUM,ANS-2
Q24-POINT PARTICLE,ANS-1
Q25-SPEED OF RELATIVISTIC PARTICLE,ANS-4
Q26-DIATOMIC MOLECULE,ANS-4
Q28-STATIC CHARGE,ANS-3
Q30-YDSE,ANS-4
Q32-UNBAISED DIE,ANS-2
Q33-LEGENDRE POLY,ANS-4

27. Raghvendra Pandey23 December, 2011

CSIR–NET(Dec. 2011)Answer key for Set B
1. a 23.d 45.a 67.b*
2.c 24.a 46.d 68.d
3.b 25.a* 47.b* 69.b*
4.b 26.d 48.c* 70.b
5.a 27.c 49.b 71.c
6.d 28.c 50.c 72.b*
7.d 29.b 51.c 73.b
8.c 30.d 52.a 74.d
9.c 31.a* 53.c 75.d*
10.a 32.d 54.a*
11.d 33.d 55.d
12.b 34.b 56.d
13.d 35.a 57.c*
14.c 36.b 58.b*
15.d 37.a 59.a
16.a 38.b 60.d
17.c 39.a 61.b
18.c 40.c* 62.a
19.d 41.b 63.b
20.a 42.a 64.c
21.a 43.c 65.a*
22.b 44.a 66.c*
*may be vary …

28. Raghvendra Pandey23 December, 2011

13.b(Alluminium foil) will be correct answer.

29. Raghvendra Pandey23 December, 2011

13.b(Alluminium foil) will be correct answer.

30. raghvendra pandey sir......
are the above answers are correct?

31. cp verma .
sorry MR.Anonymous i accept some ans's i posted is wrong. and how can u say everything is wrong.and i am misleading u???
i am really very to post on your site.

32. sodiun D2/D1 ratio lies between 1.2 and 1.8. so i think ratio of inensities are 2/3.

33. M@H@BOOB.KP
BOOLET CODE B
PART A
1.most abundant elemt=oxygn
2.numbr systm, decimal equivalent =11
3.segment of circle,angle are equal=85
11.animal without modified leg=butterfly
14.jar containing an iron block put into water=level fall
15.sun becomes black hole =none of planets
18.droplets of herbicide solution on leaf=B>C>A

34. Pandey G ye aap ka answer hai ya you have try to solve this.

35. Please any one tell me what is the cut off for physical science??

36. answer for spin question is 7/2+ and 7/2+

38. Qno.2 in set-A or Qno.6 in set-B may have the ans.1
becoz this is the horizontal case and will follow the relation time=distance/velocity.
if it is in the case of vertical case, option 4 will be the correct answer.

39. for set-B,
2---ans.3
8----ans.1
9----ans.3
10---ans.1(narrow size distribution as seen from the given fig)
12---ans.2(157th position mutated to the end codon. so polypeptide chain will contain 156 AA)
14----ans.3
15---ans.4
16---ans.1
17---ans.3
19---ans.4

40. ans for c-set csir 2011 dec physics paper
1)2 2)1 3)4 4)2 5) 6)4 7)2 8)3 9) 10)2 11)1 12)2 13)1 14)1 15)1 16)1 18)1 19)3 20)4
part-B:
21)4 22)2 23)4 24)2* 25)1 26)2 27)1 28)3 29)2 30)4 31)3 32)1 33)1 34)2 35)4* 36)1 37)4 38)1 39) 40) 41)4 42) 43)3* 44)3 45) 46)2 47)3* 48)2* 49)1 50)4 51)3* 52)2 53)4 54)4 55)2 56)2 57)1* 58) 59)2 60)2 61)2 62)2 63)2* 64)4 65)3 66) 69)3 72)2
(* ------ doubt)

41. Hi, every one the comments will be useful to all if post explanations also.

will anyone tell me?
wat about the cut off marks in each section?

43. animal without modified leg-answer is butterfly

44. @Anonymous

45. criteria of passing in this examination is it necessary to pass in each section individually?

46. are u sure that all the answers are right?for the code of set B......plz give the explanation if possible for q.no 11,13,14,10,5,2,1,4,7,27,29,64,73,71......

47. blood group not match-answer is -O&B

48. q2 in set A and Q6 set B will have option 4. because the time taken for vertical motion is same because the vertical velocity is zero in the three case. note that we are neglecting the air drag

49. Physical sciences Series- B answers are available at http://www.trajectoryeducation.com,
if any body have B Series paper plz upload in pdf form so that all may check the answers.

50. What is the selection criteria for csir net.....................Approximately how many marks are sufficent for qualifying net exam?

51. 7/2 & 7/2 is wrong correct ans is 7/2 & 5/2

52. DEC-2011 PHYSICAL SCIENCES
1. (4) 2. (3) 3. (2) 4. (2) 5. (1) 6. (4) 7. (1) 8. (1)
9. (3) 10. (1) 11. (1) 12. (3) 13. (3) 14. (2) 15. (4) 16. (1)
17. (3) 18. (3) 19. (4) 20. (4) 21. (3) 22. (2) 23. (1) 24. ( )
25. (4) 26. (3) 27. (3) 28. ( ) 29. (3) 30. (4) 31. ( ) 32. (2)
33. (4) 34. (2) 35. (1) 36. (2) 37. (4) 38. (2) 39. (2) 40. (3)
41. (1) 42. (3) 43. (3) 44.(1) 45. (4) 46. (3) 47. (3) 48. ( )
49. (2) 50. (1) 51. (3) 52. (1) 53. (3) 54. (2) 55. (4) 56. (2)
57. (3) 58. ( ) 59. (1) 60. (3) 61. (2) 62. (1) 63. (3) 64. (3)
65. (2) 66. (4) 67. (2) 68. (4) 69. (2) 70. (4) 71. (3) 72. (4)
73. (2) 74. (4) 75. (1)

53. inme koi right answer bhi h

54. My answers for Booklet code A are,

21.Unbiased dice - (2)
22.Equation for plane - (2)
23.Eigenvalues of 3x3 matrix - (3)
24.Legendare Polynomial - (4)
25.Two particles on central potential - (1)
27.Potential of a diatomic molecule - (4)
28.Double pendulum - (2)
33.Static charge distribn - answer isn't given.
34.Positronium - (2)
36.Particle in 1D potential V(x)=V(-x) - (2)
37.Perturbation H'=bx^4 - (1)
38.Internal Energy - (2)
39.Number density of free electrons - (1)
40.Maxwellian distribution - (3)
52.An annulus of mass m - (1)
53.Trajectory on zp plane - (1)
57.Uncertainty in harmonic oscillator - (1)
58.The wave function of a particle at t=0.. - (2)
59.Constant perturbation - (3)
64.Zener diode - (2)
65.Monochromatic light - (1)
73.An electron of energy 27GeV - (1)
74.Shell model parity - (3)
75.Mirror Nuclei - (2)

I've verified these answers. Please let me know if there's any error.

55. @Anonymous

The answer is tA=tB=tC because the horizontal distances vary according to the horizontal component of velocity which depends on the kicking. but vertical component depends only on acceleration due to gravity.

56. Q No 74
I think answer is 3 (7/2 and 5/2)

57. when we can expect DEc 2011 results

58. Physical science answer key for booklet B
Part B
21-3, 22-2, 23-1, 24-1, 25-4, 26-
27-3,28-4,29-3,30-4,31- no circuit,32-2,33-4,34-2,35-1,36-2,37-3,38-2,39-1,40-3,41-1,42-3,43-3,44-1,45-4.

Part c
46-4, 47-1(HERA experiment),48-1,49-2,50-1,51-3,52-1,53-3,54-2,55-4,56-2,57-3,58-1(dT/dt)time factor &-D generates major variation),59-1,60-3,61-2,62-3(E tot= 3/2 NKTEavg),63-2,64-3,65-2,66-2,67-2,68-4(at7000deg D1/D2=.55 at 3000deg D1/D2=.98),69-3(I order corection inver propo. to 4), 70-2, 71-4(Acc Debay's theory), 72-2(Kinetic theory of gases but 0K Eavg =0),73-2,74-4,75-1(n=nhc/wav lent, P=vi)