CSEC Physics · 2021 · Paper 2

43 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 marksState Hooke's law.
2. 1(b)(i)4 marksComplete Table 1 by inserting the missing force and extension values in Columns 2 and 4 respectively.
3. 1(b)(ii)8 marksUsing the grid provided in Figure 1, plot a graph of extension, e, versus force, F.
4. 1(c)4 marksCalculate the gradient, S, of the graph on page 5.
5. 1(d)3 marksGiven the gradient, S = 1/k, calculate the spring constant, k.
6. 1(e)3 marksGiven that F = ke, calculate the length, l, when a force of 8.0 N is applied. Assume that the spring obeys Hooke's law.
7. 2(a)(i)3 marksDefine the term moment of a force.
8. 2(a)(ii)2 marksDefine the term centre of gravity.
9. 2(b)2 marksState the TWO conditions necessary for a body to be in equilibrium.
10. 2(c)(i)2 marksCalculate the tension in Spring Q. Show ALL working.
11. 2(c)(ii)5 marksBy taking moments about A, determine the horizontal distance from P to C.
12. 2(c)(iii)1 markState why the centre of gravity is located closer to the point P than the point Q.
13. 3(a)(i)3 marksExplain what is meant by a 'transverse wave'.
14. 3(a)(ii)1 markGive ONE example of a 'transverse wave'.
15. 3(b)(i)2 marksDefine the term 'ultrasound'.
16. 3(b)(ii)1 markState ONE example of the application of ultrasound.
17. 3(c)(i)2 marksDetermine the angle of incidence on the face MN.
18. 3(c)(ii)1 markDetermine the angle of reflection on the face MN.
19. 3(c)(iii)4 marksDetermine the angle of refraction at the face MN, given that the refractive index of ice is 1.31.
20. 3(d)1 markOn the diagram in Figure 3, label the critical angle, θ_c, for ice.
21. 4(a)(i)2 marksOn Figure 4, sketch the graph of pressure versus temperature (in degrees Celsius) for an ideal gas.
22. 4(a)(ii)2 marksExplain how the graph could be used to derive the Kelvin scale.
23. 4(a)(iii)2 marksUsing T to represent the Kelvin temperature and θ to represent the Celsius temperature, state the mathematical relationship between the Kelvin and Celsius temperature scales.
24. 4(b)5 marksA container stores 5.0 m³ of gas at a pressure of 13 atmospheres and a temperature of -23 °C. Calculate the volume that the same gas would occupy at a temperature of 27 °C and atmospheric pressure of 1 atmosphere.
25. 4(c)(i)2 marksExplain the difference in the motion of the particles in Block X compared with the motion of the particles in Block Y.
26. 4(c)(ii)1 markIn which direction would thermal energy be transferred?
27. 4(c)(iii)1 markState the condition under which the transfer of thermal energy would cease.
28. 5(a)(i)2 marksDraw the magnetic field between the poles of the magnet on Figure 6.
29. 5(a)(ii)1 markState the direction in which side DA of the coil will move as the current starts flowing through the circuit.
30. 5(a)(iii)1 markName the rule used to determine the direction in which side DA of the coil moves.
31. 5(a)(iv)2 marksExplain why a split-ring (commutator) is used in a d.c. motor.
32. 5(b)(i)3 marksCalculate the value of the frequency for the generator.
33. 5(b)(ii)3 marksThe peak voltage is applied by the generator across a 100.0 Ω resistor. Calculate the peak value of the current in the resistor.
34. 5(c)(i)2 marksState the effect this will have on the period of the output.
35. 5(c)(ii)1 markState the effect this will have on the value of the output voltage.
36. 6(a)(i)1 markFor a neutral atom of Radium-226, state the number of protons.
37. 6(a)(ii)1 markFor a neutral atom of Radium-226, state the number of neutrons.
38. 6(a)(iii)1 markFor a neutral atom of Radium-226, state the number of electrons.
39. 6(b)(i)3 marksExplain what is meant by the term 'radioactivity'.
40. 6(b)(ii)2 marksComplete the equation for the decay of Radium-226: ²²⁶₈₈Ra ->
41. 6(c)(i)2 marksDefine the term 'half-life'.
42. 6(c)(ii)4 marksAt a certain time, a sample contains 8.0 × 10⁸ Radium nuclei. Calculate the number of α-particles emitted by the Radium nuclei in the next 4800 years.
43. 6(c)(iii)1 markHow much more time will elapse before the number of Radium nuclei remaining falls to 0.5 × 10⁸?