• 9702 November 2009 Paper 12 Worked Solutions | A-Level Physics

Paper 12

1 C                  11 B                21 B                31 D

2 B                  12 D                22 B                32 A

3 A                  13 A                23 B                33 A

4 A                  14 D                24 D                34 B

5 B                  15 C                25 D                35 C

6 C                  16 C                26 D                36 C

7 D                  17 D                27 B                37 D

8 A                  18 B                28 A                38 C

9 C                  19 D                29 C                39 B

10 C                20 C                30 C                40 A

Notes for some specific questions:


3 - Ans: A. The diagram shows an oscilloscope screen displaying two signals. Signal X has a frequency of 50 Hz and peak voltage of 12 V. ...

4 – Ans: A. {Detailed explanations for this question is available as Solution 221 at Physics 9702 Doubts | Help Page 36 - http://physics-ref.blogspot.com/2014/12/physics-9702-doubts-help-page-36.html}

6 - Ans: C. {Detailed explanations for this question is available as Solution 969 at Physics 9702 Doubts | Help Page 200 - http://physics-ref.blogspot.com/2015/09/physics-9702-doubts-help-page-200.html}


7 - Ans: D. {Detailed explanations for this question is available as Solution 945 at Physics 9702 Doubts | Help Page 195 - http://physics-ref.blogspot.com/2015/09/physics-9702-doubts-help-page-195.html}

8 – Ans: A. {Detailed explanations for this question is available as Solution 138 at Physics 9702 Doubts | Help Page 25 - http://physics-ref.blogspot.com/2014/11/physics-9702-doubts-help-page-25.html}

9 - Ans: C. {Detailed explanations for this question is available as Solution 98 at Physics 9702 Doubts | Help Page 18 - http://physics-ref.blogspot.com/2014/11/physics-9702-doubts-help-page-18.html}


10 - Ans: C. {Detailed explanations for this question is available as Solution 1045 at Physics 9702 Doubts | Help Page 219 - http://physics-ref.blogspot.com/2015/10/physics-9702-doubts-help-page-219.html}

11 – Ans: B. {Detailed explanations for this question is available as Solution 152 at Physics 9702 Doubts | Help Page 26 - http://physics-ref.blogspot.com/2014/11/physics-9702-doubts-help-page-26.html}

12 - Ans: D. {Detailed explanations for this question is available as Solution 127 at Physics 9702 Doubts | Help Page 23 - http://physics-ref.blogspot.com/2014/11/physics-9702-doubts-help-page-23.html}


13 - Ans: A. {Detailed explanations for this question is available as Solution 143 at Physics 9702 Doubts | Help Page 25 - http://physics-ref.blogspot.com/2014/11/physics-9702-doubts-help-page-25.html}


14 - Ans: D. {Detailed explanations for this question is available as Solution 832 at Physics 9702 Doubts | Help Page 166 - http://physics-ref.blogspot.com/2015/06/physics-9702-doubts-help-page-166.html}


15 - Ans: C. {Detailed explanations for this question is available as Solution 949 at Physics 9702 Doubts | Help Page 196 - http://physics-ref.blogspot.com/2015/09/physics-9702-doubts-help-page-196.html}


16 - Ans: C. {Detailed explanations for this question is available as Solution 979 at Physics 9702 Doubts | Help Page 202 - http://physics-ref.blogspot.com/2015/09/physics-9702-doubts-help-page-202.html}



18 - Ans: B. {Detailed explanations for this question is available as Solution 1071 at Physics 9702 Doubts | Help Page 225 - http://physics-ref.blogspot.com/2015/11/physics-9702-doubts-help-page-225.html}


19 - Ans: D.
Which row best defines elastic and plastic behaviour of a material?

20 – Ans: C. {Detailed explanations for this question is available as Solution 322 at Physics 9702 Doubts | Help Page 55 - http://physics-ref.blogspot.com/2015/01/physics-9702-doubts-help-page-55.html}

21 - Ans: B. {Detailed explanations for this question is available as Solution 796 at Physics 9702 Doubts | Help Page 160 - http://physics-ref.blogspot.com/2015/06/physics-9702-doubts-help-page-160.html}



22 - Ans: B. {Detailed explanations for this question is available as Solution 638 at Physics 9702 Doubts | Help Page 126 - http://physics-ref.blogspot.com/2015/04/physics-9702-doubts-help-page-126.html}


24 - Ans: D. {Detailed explanations for this question is available as Solution 393 at Physics 9702 Doubts | Help Page 73 - http://physics-ref.blogspot.com/2015/03/physics-9702-doubts-help-page-73.html}

25 – Ans: D. dsinθ_n = nλ. Diffraction grating has 300lines/mm. So, d = 1x10^-3 / 300 = 3x10^-6 m. Consider the largest angle possible: θ_n = 90^o. sinθ_n = 1. Total number of transmitted maxima on 1 side, n = d / λ = (3x10^-6) / (450x10^-9) = 7.4074 = 7 since n is an integer. So, considering the other side in additional to the central maxima, total number of transmitted maxima = 7 + 7 + 1 =15.

26 - Ans: D. {Detailed explanations for this question is available as Solution 596 at Physics 9702 Doubts | Help Page 117 - http://physics-ref.blogspot.com/2015/04/physics-9702-doubts-help-page-117.html}


27 - Ans: B. {Detailed explanations for this question is available as Solution 399 at Physics 9702 Doubts | Help Page 74 - http://physics-ref.blogspot.com/2015/03/physics-9702-doubts-help-page-74.html}


29 - Ans: C. {Detailed explanations for this question is available as Solution 407 at Physics 9702 Doubts | Help Page 76 - http://physics-ref.blogspot.com/2015/03/physics-9702-doubts-help-page-76.html}

30 – Ans: C. Rate of energy transfer = Power. P = VI = I²R. Answer A gives P = 4Js^-1. B gives 32Js^-1. C gives 16Js^-1 and D gives 256Js^-1. So, ans = C.

32 - Ans: A. {Detailed explanations for this question is available as Solution 1111 at Physics 9702 Doubts | Help Page 238 - http://physics-ref.blogspot.com/2016/05/physics-9702-doubts-help-page-238.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.