CSEC Physics · May/June 2012 · 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)8 marksPlot on page 3, a graph of potential difference (V) versus current (I).
2. 1(b)4 marksCalculate the gradient of the line obtained in (a). (Do not use any point that coincides with a point from the table.)
3. 1(c)1 markState the physical property of the device with which the gradient is associated.
4. 1(d)1 markUsing the information from the graph, comment on the relationship between the potential difference, (V), and the current (I).
5. 1(e)4 marksDraw a labelled circuit diagram to show how the student should have connected his/her apparatus to conduct the investigation.
6. 1(f)4 marksWith reference to 1 (e), describe the procedure used to conduct the investigation.
7. 1(g)3 marksThree devices with resistances 8 Ω, 12 Ω and 15 Ω are connected in a circuit. Find the combined resistance of these devices when they are arranged in parallel.
8. 2(a)(i)3 marksComplete Table 2 which relates the physical quantities and their derived SI units.
9. 2(a)(ii)4 marksState TWO fundamental quantities and their corresponding SI units.
10. 2(b)(i)3 marksCalculate the density of gasoline which occupies 150 cm³ of space and has a mass of 102 g.
11. 2(b)(ii)3 marksIf 325 g of mercury of density 13.6 gcm⁻³ occupies a certain space, determine the volume of the space.
12. 2(b)(iii)2 marksCalculate the relative density of gasoline using the density of mercury as the base quantity for the comparison.
13. 3(a)2 marksDetermine its weight in air. [Acceleration due to gravity, g = 10 N Kg⁻¹]
14. 3(b)2 marksFor land transport, the yacht is secured on a trailer. Each tyre on the trailer can support up to a maximum of 7000 Newtons. What is the LEAST number of tyres the trailer should have to support the yacht adequately?
15. 3(c)(i)2 marksMany forces act on the yacht yet it is in equilibrium. State TWO conditions that must be satisfied for an object to be in equilibrium.
16. 3(c)(ii)1 markState the effect that the position of the centre of gravity of an object has on its stability.
17. 3(d)(i)2 marksState Archimedes' Principle.
18. 3(d)(ii)2 marksThe yacht's hull is made of steel with density, ρ, equal 7850 kg m⁻³. Explain how the yacht is able to float in sea water of density, ρ_sea 1025 kg m⁻³.
19. 3(d)(iii)4 marksCalculate the volume of sea water displaced by the yacht as it floats.
20. 4(a)6 marksDescribe this experiment and explain how it established the nuclear structure of the atom.
21. 4(b)(i)2 marksRewrite and complete the nuclear equation for this process.
22. 4(b)(ii)7 marksCalculate the energy released in the nuclear reaction in 4 (b)(i). State your answer in Joules. [ c = 3.0 x 10⁸ m s⁻¹]
23. 5(a)(i)1 markState the equation for the General Gas Law.
24. 5(a)(ii)5 marksExplain, in terms of the kinetic theory, how pressure is exerted by the air in the balloon.
25. 5(b)(i)6 marksA block of ice of mass 2000 g was heated from 0 °C to steam at 100 °C. Calculate the energy used in Joules.
26. 5(b)(ii)3 marksIf the activity at (b) (i) took place in 6000 s, how much power was utilized?
27. 6(a)(i)3 marksOutline THREE differences between 'light waves' and 'sound waves'.
28. 6(a)(ii)3 marksElectromagnetic waves have many properties. Write a paragraph describing at least THREE properties not referred to in Part (a) (i).
29. 6(b)5 marksCalculate the speed of the sound generated.
30. 6(c)4 marksA popular radio station broadcasts with a frequency of 100 x 10⁶ Hz. Calculate, in centimetres, the wavelength of the sound waves generated. [ Speed of radio waves = 3.0 x 10⁸ m s⁻¹ ].