CSEC Physics · January 2013 · 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)7 marksOn page 3, plot a graph of Vs against Vp.
2. 1(b)4 marksDetermine the gradient, S, of the graph.
3. 1(c)(i)4 marksUse the gradient, S, to calculate the number of turns in the primary, Np, given that the number of turns in the secondary, Ns = 750.
4. 1(d)(ii)3 marksCalculate the current in the secondary winding, if the primary current is 1.6 A.
5. 1(d)(ii)3 marksIf the current in the secondary winding is actually 0.15 A, calculate the efficiency of this transformer.
6. 1(d)(ii)1 markHow would you know if this was 'an ideal transformer'?
7. 1(e)3 marksState THREE features of the transformer that enable it to operate efficiently.
8. 2(a)5 marksComplete Table 2 which shows physical quantities and the instruments used to measure them.
9. 2(b)(i)1 markIdentify the force which acts on the stone, causing it to fall.
10. 2(b)(ii)1 markDescribe the change in motion of the stone as a result of this force.
11. 2(c)(i)3 marksGiven that the mass of a cricket ball is 0.06 kg, calculate its weight in newtons. [Acceleration due to gravity, g = 10 m s⁻²]
12. 2(c)(ii)a)3 marksBy accurate scale drawing on Figure 2 below, determine the resultant vector.
13. 2(c)(ii)b)2 marksState its magnitude in m s⁻¹ and its direction in degrees from OA.
14. 3(a)(i)4 marksDraw and label a mercury laboratory thermometer, clearly indicating the fixed points.
15. 3(a)(ii)3 marksDraw arrows in Table 3 from each thermometer to map it to its operating range.
16. 3(b)(i)3 marksCalculate the pressure the diver is subjected to at 20 m below the surface of the water. [Density of water = 1025 kg m⁻³] [Acceleration due to gravity, g = 10 m s⁻²]
17. 3(b)(ii)5 marksBy using the general gas law, determine, as a result of the rise, the ratio of the final volume to the initial volume of a bubble.
18. 4(a)(i)3 marksDescribe Normal as it relates to the laws of reflection.
19. 4(a)(ii)3 marksDescribe Angle of incidence as it relates to the laws of reflection.
20. 4(a)(iii)3 marksDescribe Angle of reflection as it relates to the laws of reflection.
21. 4(b)3 marksState the THREE features of an image produced in a plane mirror.
22. 4(c)4 marksUsing a relevant physics concept, explain why the word ∃ОИАJUAMA is painted in this manner at the front of some emergency vehicles.
23. 4(d)(i)5 marksCalculate the angle of refraction produced on the PS boundary. [Refractive Index of glass = 1.5]
24. 4(d)(ii)5 marksName the angle of refraction produced on the QR boundary.
25. 5(a)(i)2 marksDescribe a test to show that a semi-conductor diode is defective.
26. 5(a)(ii)2 marksSketch the I-V graph for a functioning semi-conductor diode.
27. 5(a)(iii)2 marksDraw and complete a truth table for a 'NOT gate'.
28. 5(b)(i)2 marksCalculate the equivalent resistance that one can use in series.
29. 5(b)(ii)4 marksCalculate the equivalent resistance that one can use in parallel.
30. 5(c)3 marksWas that a wise decision? Justify your answer.
31. 6(a)6 marksDiscuss the importance of alternative energy to the Caribbean with reference to two sources and their uses.
32. 6(b)(i)4 marksDescribe the energy changes taking place in the ball from when it was kicked to when it hit the ground behind the goalkeeper. (Assume no energy losses.)
33. 6(b)(ii)2 marksDerive an expression in terms of m, h and v for the difference between the potential and the kinetic energy of the ball.