Monday, September 1, 2014

9702 June 2011 Paper 12 Worked Solutions | A-Level Physics

  • 9702 June 2011 Paper 12 Worked Solutions | A-Level Physics


Paper 12




1 C                  11 A                21 C                31 B
2 B                  12 B                22 B                32 C
3 A                  13 D                23 C                33 D
4 D                  14 A                24 B                34 D
5 D                  15 B                25 C                35 A
6 D                  16 C                26 B                36 C
7 D                  17 C                27 D                37 B
8 A                  18 D                28 C                38 C
9 D                  19 D                29 B                39 C
10 B                20 A                30 A                40 B



Notes for some specific questions:


3 - Ans: A. {Detailed explanations for this question is available as Solution 728 at Physics 9702 Doubts | Help Page 147 - http://physics-ref.blogspot.com/2015/05/physics-9702-doubts-help-page-147.html}


4 - Ans: D. {Detailed explanations for this question is available as Solution 879 at Physics 9702 Doubts | Help Page 178 - http://physics-ref.blogspot.com/2015/07/physics-9702-doubts-help-page-178.html}


5 - Ans: D. {Detailed explanations for this question is available as Solution 199 at Physics 9702 Doubts | Help Page 32 - http://physics-ref.blogspot.com/2014/12/physics-9702-doubts-help-page-32.html}


6 - Ans: D. {Detailed explanations for this question is available as Solution 137 at Physics 9702 Doubts | Help Page 24 - http://physics-ref.blogspot.com/2014/11/physics-9702-doubts-help-page-24.html}


7 – Ans: D. {Detailed explanations for this question is available as Solution 811 at Physics 9702 Doubts | Help Page 162 - http://physics-ref.blogspot.com/2015/06/physics-9702-doubts-help-page-162.html}


8 – Ans: A. The graph starts as a parabola since it is initially a graph of s = ½gt2 until air resistance reduces the acceleration to zero (terminal velocity is reached).


9 - Ans: D. {Detailed explanations for this question is available as Solution 845 at Physics 9702 Doubts | Help Page 168 - http://physics-ref.blogspot.com/2015/06/physics-9702-doubts-help-page-168.html}



10 – Ans: B. Since F is proportional to a (with no negative sign), they should be in the same direction. As for the velocity, it is possible that, for example, initially, velocity v is negative, and then it undergoes a positive acceleration. So, velocity does not necessarily need to be in the same direction.


13 - Ans: D. {Detailed explanations for this question is available as Solution 772 at Physics 9702 Doubts | Help Page 156 - http://physics-ref.blogspot.com/2015/05/physics-9702-doubts-help-page-156.html}


14 - Ans: A. {Detailed explanations for this question is available as Solution 508 at Physics 9702 Doubts | Help Page 99 - http://physics-ref.blogspot.com/2015/03/physics-9702-doubts-help-page-99.html}


15 - Ans: B. {Detailed explanations for this question is available as Solution 951 at Physics 9702 Doubts | Help Page 196 - http://physics-ref.blogspot.com/2015/09/physics-9702-doubts-help-page-196.html}


16 – Ans: C. Taking moments about X gives: Clockwise moment = Anticlockwise moment: 10 × ½l = F cos 60° × l (or l x Fsin30o) giving F = 5 / (cos 60°) = 10N



17 – Ans: C. Tension in the elastic is along XY and XZ (4N on each side). Angle XY makes with horizontal, θ = cos-1(30/50). Force = 2(4cosθ) = 2(4x3/5) = 4.8N


18 - Ans: D. {Detailed explanations for this question is available as Solution 536 at Physics 9702 Doubts | Help Page 105 - http://physics-ref.blogspot.com/2015/04/physics-9702-doubts-help-page-105.html}


20 - Ans: A. {Detailed explanations for this question is available as Solution 876 at Physics 9702 Doubts | Help Page 176 - http://physics-ref.blogspot.com/2015/06/physics-9702-doubts-help-page-176.html}


21 - Ans: C. {Detailed explanations for this question is available as Solution 657 at Physics 9702 Doubts | Help Page 131 - http://physics-ref.blogspot.com/2015/05/physics-9702-doubts-help-page-131.html}


23 - Ans: C. {Detailed explanations for this question is available as Solution 788 at Physics 9702 Doubts | Help Page 159 - http://physics-ref.blogspot.com/2015/06/physics-9702-doubts-help-page-159.html}


24 – Ans: B. {Detailed explanations for this question is available as Solution 300 at Physics 9702 Doubts | Help Page 51 - http://physics-ref.blogspot.com/2015/01/physics-9702-doubts-help-page-51.html}
 



26 – Ans: B. The x-axis represents time. So, the period is represented by the (horizontal – along x-axis) separation XY. The y-axis represents displacement. Note that amplitude is the maximum displacement and the term ‘amplitude’ can only be used to represents to peak values of displacement.


27 - Ans: D. {Detailed explanations for this question is available as Solution 852 at Physics 9702 Doubts | Help Page 170 - http://physics-ref.blogspot.com/2015/06/physics-9702-doubts-help-page-170.html}


29 - Ans: B. {Detailed explanations for this question is available as Solution 385 at Physics 9702 Doubts | Help Page 70 - http://physics-ref.blogspot.com/2015/02/physics-9702-doubts-help-page-70.html}


30 - Ans: A. {Detailed explanations for this question is available as Solution 180 at Physics 9702 Doubts | Help Page 29 - http://physics-ref.blogspot.com/2014/11/physics-9702-doubts-help-page-29.html}


31 – Ans: B. {Detailed explanations for this question is available as Solution 815 at Physics 9702 Doubts | Help Page 163 - http://physics-ref.blogspot.com/2015/06/physics-9702-doubts-help-page-163.html}


32 - Ans: C. {Detailed explanations for this question is available as Solution 822 at Physics 9702 Doubts | Help Page 164 - http://physics-ref.blogspot.com/2015/06/physics-9702-doubts-help-page-164.html}


33 - Ans: D. {Detailed explanations for this question is available as Solution 802 at Physics 9702 Doubts | Help Page 161 - http://physics-ref.blogspot.com/2015/06/physics-9702-doubts-help-page-161.html}


34 – Ans: D. {Detailed explanations for this question is available as Solution 372 at Physics 9702 Doubts | Help Page 67 - http://physics-ref.blogspot.com/2015/02/physics-9702-doubts-help-page-67.html}


35 - Ans: A. {Detailed explanations for this question is available as Solution 767 at Physics 9702 Doubts | Help Page 155 - http://physics-ref.blogspot.com/2015/05/physics-9702-doubts-help-page-155.html}


36 - Ans: C. {Detailed explanations for this question is available as Solution 601 at Physics 9702 Doubts | Help Page 118 - http://physics-ref.blogspot.com/2015/04/physics-9702-doubts-help-page-118.html}


37 - Ans: B. {Detailed explanations for this question is available as Solution 856 at Physics 9702 Doubts | Help Page 171 - http://physics-ref.blogspot.com/2015/06/physics-9702-doubts-help-page-171.html}

Explanations have been provided for questions that were found to be more difficult. If you are having other doubts that have not been explained here, you may ask your questions through comments. 

77 comments:

  1. Replies
    1. Explanations for Qu 10 is available above

      Delete
  2. Can you explain why is C wrong for question 30? Thank you!

    ReplyDelete
    Replies
    1. The relevant explanations have been added

      Delete
  3. for 16 why is taking resultant forces not possible
    for instance fsin30 = 10 giving f=20
    thnks (:

    ReplyDelete
    Replies
    1. This is not a POINT object. So, taking only the resultant force to be zero will not mean that equilibrium has been reached since the forces do NOT act on the SAME point. In this case, we need to find F such that the resultant TORQUE is zero. That is, there is no turning effect on the rod.

      Delete
  4. for 25 isnt wavelen of visible light 10^-7 so c/wavelen shud give 10^15 right so why c

    ReplyDelete
    Replies
    1. A typical human eye will respond to wavelengths from about 390 to 700 nm. In terms of frequency, this corresponds to a band in the vicinity of 430–790 THz ≈ 10^14Hz.

      Delete
  5. Question 14 please?

    ReplyDelete
  6. M/J 11 Paper 13 Question number 17 and 27 pleeeeeease???

    ReplyDelete
    Replies
    1. Question 17 is explained as solution 672 at
      http://physics-ref.blogspot.com/2015/05/physics-9702-doubts-help-page-135.html

      Delete
  7. MJ 11 paper 13 question 37 PLEASE!!!!

    ReplyDelete
    Replies
    1. check at
      http://physics-ref.blogspot.com/2015/03/physics-9702-doubts-help-page-94.html

      Delete
  8. Replies
    1. Could you specify clearly which year and which variant? I can't figure which it is.

      Delete
  9. question 18 please

    ReplyDelete
  10. Q 35 please
    June 2011 Variant 13

    ReplyDelete
    Replies
    1. See question 622 at
      http://physics-ref.blogspot.com/2015/04/physics-9702-doubts-help-page-123.html

      Delete
  11. Q14 variant 11 June 2011 please.

    ReplyDelete
    Replies
    1. See solution 701 at
      http://physics-ref.blogspot.com/2015/05/physics-9702-doubts-help-page-142.html

      Delete
  12. Replies
    1. For Q9, see solution 715 at
      http://physics-ref.blogspot.com/2015/05/physics-9702-doubts-help-page-145.html

      For Q10, see solution 729 at
      http://physics-ref.blogspot.com/2015/05/physics-9702-doubts-help-page-148.html

      Delete
  13. can u explain question 22 of this paper please ?

    ReplyDelete
  14. sorry that was october 2010 (12) q22 not q22 of this paper

    ReplyDelete
    Replies
    1. Go to
      http://physics-ref.blogspot.com/2014/11/9702-november-2010-paper-12-worked.html

      Delete
  15. I'd really appreciate it if you could help me out with Q.21 in M/J 2011, variant 12. I can't wrap my head around all the ratios. BTW, awesome job with the site. Just one suggestion. You should put all the Physics doubt page links on a separate page so if someone just wants to skim through the questions, they can do so. Keep up the good work :)

    ReplyDelete
    Replies
    1. Question 21 has been explained above.

      Yeah, I planned to do it but had too many other things to do- it's gonna be page 0.

      Thanks for the suggestion. I've been hoping for suggestions from those who use the site for a long time but did not receive much.

      I also want to improve it.

      Delete
  16. Question 13 please

    ReplyDelete
  17. O/N 2011 variant 11
    q 5,6,18,30,33,36,37.
    Thank you in advance.

    ReplyDelete
    Replies
    1. For Q36, see solution 790 at
      http://physics-ref.blogspot.com/2015/06/physics-9702-doubts-help-page-159.html

      For Q6, see solution 538 at
      http://physics-ref.blogspot.com/2015/04/physics-9702-doubts-help-page-105.html

      For Q30, see solution 480 at
      http://physics-ref.blogspot.com/2015/03/physics-9702-doubts-help-page-93.html

      Q37, see solution 763 at
      http://physics-ref.blogspot.com/2015/05/physics-9702-doubts-help-page-154.html

      Delete
  18. question 33 please

    ReplyDelete
  19. Please explain o/n 2012 13 q 15

    ReplyDelete
    Replies
    1. See solution 870 at
      http://physics-ref.blogspot.com/2015/06/physics-9702-doubts-help-page-174.html

      Delete
  20. Please explain 7.

    ReplyDelete
  21. q8 q9 q13 q20 q33 pls

    ReplyDelete
  22. in q 31 why is option d incorrect

    ReplyDelete
  23. Can you please add number 37? Thank you

    ReplyDelete
  24. Hi

    Add Q No 4 explanation as soon as possible. I am Muhammad Kamran Khalil from Beaconhouse School System Lahore.

    ReplyDelete
  25. Hi

    Thnks for adding solution.
    Will you please upload the missing variants of MCQs and Theory as earlier as possible like May June 2011 Paper 1 MCQs/ 11 ,
    then Oct Nov 2010 paper 1 MCQs/11
    and i will tell you which other are missing.
    The best thing which I have found on these solutions is detailed explanation.

    Thnks From Muhammad Kamran Khalil

    ReplyDelete
    Replies
    1. No problem.
      However, it would be best to specify the questions in these variants. The complete papers themselves may be added some time later.

      Delete
  26. Replies
    1. See solution 924 at
      http://physics-ref.blogspot.com/2015/08/physics-9702-doubts-help-page-189.html

      Delete
  27. Replies
    1. See solution 999 at
      http://physics-ref.blogspot.com/2015/10/physics-9702-doubts-help-page-207.html

      Delete
  28. Replies
    1. See solution 991 at
      http://physics-ref.blogspot.com/2015/10/physics-9702-doubts-help-page-205.html

      Delete
  29. in q15 of this paper why cant option a be correct
    thank u

    ReplyDelete
  30. can someone give an explanation to question no.5

    ReplyDelete
  31. May june 2011 variant 11 q no.25,26,27,28 please...........

    ReplyDelete
    Replies
    1. For Q26, see solution 1126 at
      http://physics-ref.blogspot.com/2016/10/physics-9702-doubts-help-page-243.html

      Delete
  32. q no. 36 and 37 variant 11...

    ReplyDelete
    Replies
    1. they have already been explained. try to type the following at google search:
      physics ref 9702 june 2011 paper 11 Q37

      change the question numbers

      Delete

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