CSEC Physics · May/June 2006 · Paper 2

33 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)3 marksComplete the table above.
2. 1(b)11 marksPlot on the graph page opposite a graph of energy supplied against temperature change.
3. 1(c)6 marksCalculate the gradient of the graph.
4. 1(d)1 markAssuming that the energy loss to the container and the surroundings is negligible, what physical quantity does this gradient represent?
5. 1(e)2 marksDetermine the value of this quantity if 1 kg of water were used and state the physical quantity this represents.
6. 1(f)3 marksWater boils at 100°C. Calculate the heat energy which must be supplied in order to completely convert the 2 kg of water to steam. [Specific latent heat of vaporization of water = 2.3 x 10⁶ Jkg⁻¹]
7. 1(g)4 marksDistinguish between boiling and evaporation.
8. 2(a)2 marksExplain what is meant by 'electrical resistance'.
9. 2(b)(i)1 markIdentify the type of connection employed in this circuit.
10. 2(b)(ii)2 marksGive the meaning of the circuit symbols labelled: B, C.
11. 2(b)(iii)1 markName the type of voltage produced at A.
12. 2(c)(i)3 marksA fluorescent lamp is rated at 15W, 120V. Calculate the current which the lamp draws from the main supply.
13. 2(c)(ii)3 marksCalculate the resistance of this lamp while it is lit.
14. 2(c)(iii)3 marksWhen the lamp is lit, 4 W of the energy supplied is lost as heat. Calculate the efficiency of the lamp.
15. 3(a)(i)2 marksIndicate on Figure 2F by appropriately labelling a) the position of a crest b) the position of a trough.
16. 3(a)(ii)3 marksDraw labelled arrows on Figure 2E to show a) the direction of the wave b) the direction of hand movement needed to produce this wave.
17. 3(a)(iii)1 markIndicate on Figure 2A the direction of hand movement needed to produce a longitudinal wave.
18. 3(b)3 marksIn a classroom demonstration a student uses a slinky spring to generate waves of frequency 5 Hz with 0.65 metres separation between successive crests. Determine the speed of these waves.
19. 3(c)(i)1 markDeduce whether the velocity of a sound wave will increase, decrease or remain constant when the wave travels from a denser to a less dense medium, given that the frequency remains constant and the wavelength decreases.
20. 3(c)(ii)2 marksCompare the waves produced on the slinky spring in part (b) with a typical sound wave in terms of the motion of the particles. Transverse wave on slinky spring, Sound wave.
21. 3(d)3 marksCalculate the depth of the sea bed below the transmitter. (Speed of sound in sea water = 1 500 m s⁻¹)
22. 4(a)3 marksDefine 'the moment of a force'.
23. 4(b)3 marksState the principle of moments.
24. 4(c)(i)3 marksIndicate by drawing arrows on Figure 4 the forces acting on the bicycle.
25. 4(c)(ii)3 marksWrite TWO equations relating these forces.
26. 4(c)(iii)3 marksThe bicycle has a mass of 20 kg. Use the result you obtained in Part (c) (ii) to determine the tension in the string. [Acceleration due to gravity, g = 10 m s⁻²]
27. 5(a)3 marksComplete Table 2 below showing the International Insulation Colour Code.
28. 5(b)3 marksFuses are sometimes used to protect electrical equipment from excess current. Explain how a fuse works.
29. 5(c)(i)1 markCalculate the total power consumed by these devices.
30. 5(c)(ii)2 marksThese devices are in use for 4 hours per day. Calculate the energy consumed in kilowatt-hours in a 30-day month.
31. 5(c)(iii)2 marksCalculate the bill for the month if each unit of electricity costs 40¢.
32. 5(c)(iv)3 marksAssuming that these devices are connected in parallel across the mains supply, and are switched ON, calculate the TOTAL current drawn from the mains.
33. 5(c)(v)1 markFuses are available with the following current ratings: 5A, 10A, 15A, 25A. Select a suitable fuse for protecting these devices.