CSEC Physics · January 2018 · Paper 2

32 questions and parts from this paper. Open one to see it in full, then practise it on Quelpr and get it marked against the mark scheme.

1. 1(a)(i)5 marksComplete Table 1 by calculating the values of sin r and sin i.
2. 1(a)(ii)8 marksUsing the calculated values in Table 1, plot a graph of sin r against sin i on the grid on page 5.
3. 1(a)(iii)4 marksCalculate the gradient of the graph.
4. 1(b)1 markState the name of the physical property represented by the gradient in (a)(iii).
5. 1(c)(i)2 marksExplain the term 'critical angle'.
6. 1(c)(ii)1 markUsing Table 1, or otherwise, state the critical angle for the glass used in (a).
7. 1(d)4 marksIf the refractive index from the cladding to the core is 1.03, calculate the critical angle in the core.
8. 2(a)7 marksComplete Table 2 to distinguish among solids, liquids and gases using the terms 'definite/fixed', 'vibrate', 'move freely', 'very weak/negligibly weak', 'no fixed shape'.
9. 2(b)(i)3 marksConvert the time recorded in Figure 3b to seconds.
10. 2(b)(ii)3 marksCalculate the mass of water evaporated in the experiment.
11. 2(c)5 marksThe power of the electric heater used in the experiment was 100 W. Assuming no heat was lost to the surroundings, calculate the specific latent heat of vaporization of water, l_v.
12. 3(a)2 marksDefine the term 'energy' and state its SI unit.
13. 3(b)(i)3 marksComplete Table 3 to show the MAIN form of energy associated with EACH of the following examples.
14. 3(b)(ii)2 marksState the MAIN energy conversions taking place when a flashlight is turned on.
15. 3(c)(i)3 marksCalculate the maximum kinetic energy of the pendulum.
16. 3(c)(ii)2 marksUse the principle of conservation of energy to find the maximum gravitational potential energy of the pendulum.
17. 3(c)(iii)3 marksCalculate the greatest height, h.
18. 4(a)4 marksState TWO arguments for and TWO arguments against the use of nuclear fission reactors.
19. 4(b)2 marksState TWO advantages of nuclear fusion over nuclear fission.
20. 4(c)3 marksCorrectly complete the following nuclear fusion reaction: ²₁H + ³₁H → ? + ¹₀n.
21. 4(d)6 marksUsing the information in Table 4, calculate the energy released in this reaction.
22. 5(a)4 marksState what evidence each proposed and whether this evidence supported the wave theory or particle theory.
23. 5(b)(i)2 marksSuggest, with a reason, an appropriate distance from the lens at which the phone should be placed in order to get a magnified image on an external screen.
24. 5(b)(ii)3 marksIf the phone is placed 20 cm from the lens, calculate the distance the screen must be placed from the lens in order to obtain a clear image of the phone.
25. 5(b)(iii)3 marksCalculate the magnification of the image on the external screen formed in (b)(ii).
26. 5(b)(iv)1 markIf the dimensions of the phone screen are 11.0 cm × 6.0 cm, calculate the dimensions of the image of the phone screen on the external screen.
27. 5(b)(v)1 markState whether the image formed in (b)(ii) is upright or inverted.
28. 5(b)(vi)1 markSuggest one way in which the image formed in (b)(ii) can be made larger.
29. 6(a)(i)2 marksComplete the following diagrams to show the magnetic field due to a current carrying conductor where the current is directed into the plane of the paper.
30. 6(a)(ii)3 marksComplete the following diagrams to show the resulting magnetic field when the current carrying conductor in (a)(i) is placed between the poles of the magnet, as shown in Figure 6.
31. 6(b)(i)1 markName the part labelled X.
32. 6(b)(ii)9 marksExplain what happens when the switch is closed. Your answer should include the direction of the current, the forces acting, any rules applied, the direction of rotation and how continuous rotation is achieved.