• 9702 June 2014 Paper 12 Worked Solutions | A-Level Physics

Paper 12

1 C                  11 A                21 C                31 A

2 B                  12 D                22 C                32 A

3 B                  13 A                23 C                33 A

4 C                  14 C                24 C                34 D

5 D                  15 B                25 B                35 B

6 B                  16 B                26 D                36 B

7 C                  17 C                27 D                37 B

8 C                  18 B                28 A                38 C

9 C                  19 D                29 D                39 C

10 B                20 A                30 B                40 C

Notes for some specific questions:

1 - Ans: C. {Detailed explanations for this question is available as Solution 1090 at Physics 9702 Doubts | Help Page 231 - http://physics-ref.blogspot.com/2016/01/physics-9702-doubts-help-page-231.html}


3 - Ans: B.
A cathode-ray oscilloscope (c.r.o.) is connected to an alternating voltage. The following trace is produced on the screen....


4 - Ans: C.
A quantity y is to be determined from the equation shown. The percentage uncertainties in p, x and q are shown.

5 - Ans: D. {Detailed explanations for this question is available as Solution 878 at Physics 9702 Doubts | Help Page 177 - http://physics-ref.blogspot.com/2015/07/physics-9702-doubts-help-page-177.html}


6 - Ans: B. {Detailed explanations for this question is available as Solution 220 at Physics 9702 Doubts | Help Page 35 - http://physics-ref.blogspot.com/2014/12/physics-9702-doubts-help-page-35.html}


7 - Ans: C. {Detailed explanations for this question is available as Solution 193 at Physics 9702 Doubts | Help Page 31 - http://physics-ref.blogspot.com/2014/12/physics-9702-doubts-help-page-31.html}


8 - Ans: C. {Detailed explanations for this question is available as Solution 774 at Physics 9702 Doubts | Help Page 156 - http://physics-ref.blogspot.com/2015/05/physics-9702-doubts-help-page-156.html}


9 - Ans: C. {Detailed explanations for this question is available as Solution 343 at Physics 9702 Doubts | Help Page 60 - http://physics-ref.blogspot.com/2015/02/physics-9702-doubts-help-page-60.html}


10 - Ans: B. {Detailed explanations for this question is available as solution 72 at Physics 9702 Doubts | Help Page 13 - http://physics-ref.blogspot.com/2014/11/physics-9702-doubts-help-page-13.html}


11 - Ans: A. {Detailed explanations for this question is available as Solution 800 at Physics 9702 Doubts | Help Page 161 - http://physics-ref.blogspot.com/2015/06/physics-9702-doubts-help-page-161.html}


12 - Ans: D. {Detailed explanations for this question is available as Solution 222 at Physics 9702 Doubts | Help Page 36 - http://physics-ref.blogspot.com/2014/12/physics-9702-doubts-help-page-36.html}


13 - Ans: A. {Detailed explanations for this question is available as Solution 230 at Physics 9702 Doubts | Help Page 37 - http://physics-ref.blogspot.com/2014/12/physics-9702-doubts-help-page-37.html}

14 – Ans: C. {Detailed explanations for this question is available as Solution 883 at Physics 9702 Doubts | Help Page 179 - http://physics-ref.blogspot.com/2015/07/physics-9702-doubts-help-page-179.html}

15 - Ans: B. {Detailed explanations for this question is available as solution 76 at Physics 9702 Doubts | Help Page 14 - http://physics-ref.blogspot.com/2014/11/physics-9702-doubts-help-page-14.html}

16 – Ans: B. {Detailed explanations for this question is available as Solution 833 at Physics 9702 Doubts | Help Page 166 - http://physics-ref.blogspot.com/2015/06/physics-9702-doubts-help-page-166.html}

18 - Ans: B. {Detailed explanations for this question is available as solution 80 at Physics 9702 Doubts | Help page 15 - http://physics-ref.blogspot.com/2014/11/physics-9702-doubts-help-page-15.html}


19 - Ans: D. {Detailed explanations for this question is available as Solution 293 at Physics 9702 Doubts | Help Page 49 - http://physics-ref.blogspot.com/2015/01/physics-9702-doubts-help-page-49.html}



21 - Ans: C. {Detailed explanations for this question is available as Solution 186 at Physics 9702 Doubts | Help Page 30 - http://physics-ref.blogspot.com/2014/11/physics-9702-doubts-help-page-30.html}



Question 22
What, to two significant figures, are the period, the frequency and the amplitude of the wave represented by the graph? ...



23 - Ans: C. {Detailed explanations for this question is available as solution 86 at Physics 9702 Doubts | Help Page 16 - http://physics-ref.blogspot.com/2014/11/physics-9702-doubts-help-page-16.html}

24 – Ans: C. {Detailed explanations for this question is available as Solution 440 at Physics 9702 Doubts | Help Page 84 - http://physics-ref.blogspot.com/2015/03/physics-9702-doubts-help-page-84.html}

26 - Ans: D. {Detailed explanations for this question is available as Solution 148 at Physics 9702 Doubts | Help Page 26 - http://physics-ref.blogspot.com/2014/11/physics-9702-doubts-help-page-26.html}


27 - Ans: D. {Detailed explanations for this question is available as Solution 167 at Physics 9702 Doubts | Help Page 28 - http://physics-ref.blogspot.com/2014/11/physics-9702-doubts-help-page-28.html}

28 – Ans: A. Field lines are from +ve to –ve. The field lines of each charge will affect each other, so the field lines from the +ve charges is not straight lines here. Additionally, for the 2 +ve charges, the field lines should go in opposite direction (since the like charges repel), unlike ans B.

29 - Ans: D. {Detailed explanations for this question is available as Solution 827 at Physics 9702 Doubts | Help Page 165 - http://physics-ref.blogspot.com/2015/06/physics-9702-doubts-help-page-165.html}


30 - Ans: B. {Detailed explanations for this question is available as solution 90 at Physics 9702 Doubts | Help Page 17 - http://physics-ref.blogspot.com/2014/11/physics-9702-doubts-help-page-17.html}


31 - Ans: A. {Detailed explanations for this question is available as Solution 1034 at Physics 9702 Doubts | Help Page 216 - http://physics-ref.blogspot.com/2015/10/physics-9702-doubts-help-page-216.html}

32 – Ans: A. {Detailed explanations for this question is available as Solution 419 at Physics 9702 Doubts | Help Page 79 - http://physics-ref.blogspot.com/2015/03/physics-9702-doubts-help-page-79.html}

33 - Ans: A. {Detailed explanations for this question is available as Solution 174 at Physics 9702 Doubts | Help Page 29 - http://physics-ref.blogspot.com/2014/11/physics-9702-doubts-help-page-29.html} 

34 - Ans: D. {Detailed explanations for this question is available as Solution 535 at Physics 9702 Doubts | Help Page 104 - http://physics-ref.blogspot.com/2015/04/physics-9702-doubts-help-page-104.html}


35 - Ans: B. {Detailed explanations for this question is available as solution 96 at Physics 9702 Doubts | Help Page 18 - http://physics-ref.blogspot.com/2014/11/physics-9702-doubts-help-page-18.html}

36 – Ans: B. {Detailed explanations for this question is available as Solution 1067 at Physics 9702 Doubts | Help Page 224 - http://physics-ref.blogspot.com/2015/11/physics-9702-doubts-help-page-224.html}

37 - Ans: B. {Detailed explanations for this question is available as Solution 1058 at Physics 9702 Doubts | Help Page 222 - http://physics-ref.blogspot.com/2015/11/physics-9702-doubts-help-page-222.html}


38 - Ans: C.
A nucleus X decays into a nucleus Y by emitting an alpha particle followed by two beta particles.

40 - Ans: C. {Detailed explanations for this question is available as Solution 820 at Physics 9702 Doubts | Help Page 164 - http://physics-ref.blogspot.com/2015/06/physics-9702-doubts-help-page-164.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.