CSEC Physics · January 2009 · Paper 2

34 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 marksOn the grid provided on page 3, plot the graph of ΔP against Δh.
2. 1(b)(i)2 marksWrite an equation linking liquid pressure, density and depth.
3. 1(b)(ii)5 marksCalculate the slope, S, of the graph.
4. 1(b)(iii)4 marksTable 2 shows three liquids and their densities. Determine which of these liquids was used in the experiment.
5. 1(c)2 marksUsing the graph you plotted on page 3, find the TOTAL pressure exerted on the base of the container in Figure 1. (Gravitational field strength, g = 10 Nkg⁻¹) (Atmospheric pressure = 1.03 × 10⁵ Pa)
6. 1(d)(i)2 marksState, giving a reason, if the pressure of the gas is LESS than or GREATER than atmospheric pressure.
7. 1(d)(ii)2 marksCalculate the EXCESS pressure in mm Hg.
8. 2(a)7 marksComplete Table 3 below to show the link between an electromagnetic wave, its source and its use or effect.
9. 2(b)4 marksMicrowaves travel at a speed of 3.0 x 10⁸ m s⁻¹ in a vacuum and have a frequency of 1.5 x 10¹⁰ Hz. Calculate the wavelength of microwaves, in centimetres.
10. 2(c)4 marksAs the microwaves enter water at an angle of incidence of 45°, their speed is reduced to 2.0 x 10⁸ m s⁻¹. Calculate the wavelength of the microwaves in water.
11. 3(a)(i)2 marksDefine the 'lower fixed point' on the Celsius scale.
12. 3(a)(ii)5 marksComplete Table 4 by listing TWO other types of thermometers and the physical property which varies in EACH of the three thermometers.
13. 3(b)(i)3 marksCalculate the specific heat capacity of the water. [Acceleration due to gravity, g = 10.0 m s⁻²]
14. 3(b)(ii)2 marksIf the waterfall was twice as tall, determine by how much the water temperature would change from its initial value.
15. 3(c)3 marksA gas of volume 60.0 cm³ and initial pressure 2.0 x 10⁵ Pa has its pressure reduced to 1.6 x 10⁵ Pa. If the temperature remains constant, what is the final volume of this gas?
16. 4(a)6 marksWith the aid of a labelled diagram, describe an experiment to show that the angle of incidence is equal to the angle of reflection.
17. 4(b)(i)9 marksCalculate the angle of refraction at the AD boundary.
18. 4(b)(ii)9 marksWhat is the value of the angle of emergence at the BC boundary?
19. 4(b)(iii)9 marksIf the critical angle for glass is 42°, describe what would happen to the ray if its angle of incidence on boundary BC was 42.5°.
20. 4(b)(iv)9 marksState the reason for your conclusion at (iii) above.
21. 5(a)(i)3 marksExplain the meaning of EACH of the following terms: Atomic number
22. 5(a)(ii)3 marksExplain the meaning of EACH of the following terms: Mass number
23. 5(a)(iii)3 marksExplain the meaning of EACH of the following terms: Neutron number
24. 5(b)1 markWith reference to the symbol A X, write the formula that links the neutron number to the atomic number and the mass number.
25. 5(c)(i)2 marksDescribe the relationship between the shell model of the atom and the periodic table.
26. 5(c)(ii)2 marksExplain the meaning of the term 'isotope'.
27. 5(d)5 marksOne gram of a living plant containing Carbon-14, decays at about 16 disintegrations per minute. It is found that one gram of a dead plant decays at 1 disintegration per minute. The half-life of Carbon-14 is about 5500…
28. 5(e)(i)4 marksCopy the three stages above and complete EACH equation.
29. 5(e)(ii)4 marksExplain why lead is used when handling radioisotopes.
30. 6(a)5 marksExplain the principles involved in the workings of the transformer, and how it is able to step down the input voltage.
31. 6(b)(i)9 marksCalculate the voltage across the secondary coil of the transformer
32. 6(b)(ii)9 marksCalculate the current in the secondary coil of the transformer
33. 6(b)(iii)9 marksCalculate the electrical power dissipated in the lamp.
34. 6(c)1 markHigh voltages are used to transmit electrical energy over long distances through long-distance cables. State an advantage of using high voltages.