CSEC Physics · January 2015 · Paper 2

30 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)6 marksComplete Table 1 to determine values for plotting a graph.
2. 1(b)7 marksOn the graph paper provided on page 3, plot a graph of Period Squared (T²) on the vertical axis versus length (l) on the horizontal axis. Start each axis at zero.
3. 1(c)4 marksCalculate the gradient of this graph.
4. 1(d)4 marksThe acceleration due to gravity, g, is related to T² and l by the equation g = 4π² × (1 / (T²/l)) [π = 3.14]. Use the gradient of the graph to calculate the value of g.
5. 1(e)4 marksDraw a clearly labelled diagram of a simple pendulum as it was used in this investigation.
6. 2(a)(i)4 marksComplete Table 2 to show two other major forms of energy and ONE example of each.
7. 2(a)(ii)1 markState the SI unit of energy.
8. 2(a)(iii)2 marksDefine the SI unit of energy named in (ii) above.
9. 2(b)(i)3 marksCalculate the amount of energy that was needed to perform this activity. (Assume no frictional forces were present.) (Gravitational field strength, g = 10 N kg⁻¹)
10. 2(b)(ii)4 marksIf this activity takes 25 seconds to complete, calculate the power utilized in kilowatts.
11. 2(b)(iii)1 markIf friction was present, what effect if any, would this have on the power needed?
12. 3(a)(i)2 marksFrom Dr T's temperature bag, shown in Figure 2, select the two temperatures to complete Table 3 for the upper and lower fixed points.
13. 3(a)(ii)1 markDefine the term ‘lower fixed point'.
14. 3(a)(iii)4 marksIn Table 4, enter the names of two different types of thermometers and the corresponding physical quantity which varies with temperature.
15. 3(b)8 marksWhat was the new temperature of the air in the tyre, in degrees Celsius, if the volume of air remained constant?
16. 4(a)(i)4 marksWith the aid of a labelled diagram, state the laws of reflection.
17. 4(a)(ii)2 marksThe glare of light from oncoming vehicles when driving on rainy nights can be annoying. With the aid of a labelled diagram, show how this glare results.
18. 4(b)(i)3 marksCalculate the refractive index of the water which causes this apparent bending if angle a = 32° and angle b = 45°.
19. 4(b)(ii)4 marksIf the pencil is now placed in ethanol with a refractive index of 1.36, calculate the new angle b given that angle a in the ethanol remains at 32°.
20. 4(b)(iii)2 marksDoes the pencil bend more or less in ethanol than in water? Justify your answer.
21. 5(a)(i)1 markState the formula that relates the potential difference across a metallic conductor at constant temperature to the current through it.
22. 5(a)(ii)1 markState the formula that expresses the total resistance, R_T, of two resistors, R₁ and R₂, in parallel.
23. 5(b)(i)2 marksWhat is the resistance of the bulb?
24. 5(b)(ii)4 marksAssuming the resistance of the bulb remains constant once lit, calculate the ammeter reading if the rheostat is set to 100 Ω.
25. 5(b)(iii)3 marksIs there a danger in reducing the rheostat resistance too much? Explain.
26. 5(b)(iv)4 marksThe assumption made in (b)(ii) is incorrect. With the aid of an I-V graph, indicate how the bulb's resistance actually varies with current.
27. 6(a)(i)3 marksDescribe the path of each of the three emissions (α, β and γ) when subjected to a uniform electric field from left if the emissions are projected up towards the top of your page.
28. 6(a)(ii)3 marksIf the electric field is replaced by a uniform magnetic field into the page, predict the path of the emissions.
29. 6(b)6 marksWith reference to the information in Table 5, write a possible sequence of three nuclear equations that can result in ²⁰⁶₈₂Pb (stable lead) from ²¹⁰₈₂Pb.
30. 6(c)3 marksCalculate the energy given off in a nuclear reaction if the change in mass is 0.2014 u. (u = 1.66 × 10⁻²⁷ kg; c = 3.0 × 10⁸ ms⁻¹).