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CAPE Physics Unit 2 · 2005 · Paper 2

51 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.

Practise this paper
  1. 1(a)1 markComplete the third column of Table 1 by calculating I^2 / (A^2 * 10^-4).
  2. 1(b)5 marksOn the grid provided on page 5, plot a graph of Added Weight, F, versus I^2.
  3. 1(c)4 marksUse your graph to determine a value for the permeability of free space, mu_0.
  4. 2(a)1 markWhat is the gain of this amplifier at low frequencies?
  5. 2(b)3 marksUsing the CRO display where the output sensitivity is 1 V/div and input is 10 mV/div, calculate the gain, A, of the amplifier for this frequency.
  6. 2(c)3 marksThe graph on page 8 shows experimental gain data against frequency. Use the graph to complete Table 2.
  7. 2(d)(i)1 markWhat is the bandwidth of the amplifier?
  8. 2(d)(ii)2 marksIf the value of input resistance R_1 is changed to 1.0 kOmega, state how the low frequency gain and bandwidth of the amplifier will change.
  9. 3(a)6 marksAdd suitable data to the third column of Table 3, plot a straight line graph on the grid provided on page 11, and state the equation of the line plotted.
  10. 3(b)4 marksUse the graph you plotted to determine the half-life of the sample.
  11. 4(a)(i)2 marksExplain clearly the difference between 'e.m.f.' and 'terminal potential difference'.
  12. 4(a)(ii)2 marksDefine the 'volt' and the 'coulomb'.
  13. 4(a)(iii)4 marksWrite down Kirchhoff's laws for electrical networks and give the physical basis for each law.
  14. 4(b)(i)8 marksUse the circuit in Figure V to find the currents I_1, I_2 and I_3.
  15. 4(b)(ii)2 marksFind the potential difference between X and Y.
  16. 4(b)(iii)2 marksFind the terminal p.d. of Battery C.
  17. 5(a)8 marksExplain the origin of the Hall effect, including a diagram showing clearly the directions of the Hall voltage and other relevant quantities for a specimen in which electron conduction predominates.
  18. 5(b)2 marksA Hall probe gives a Hall voltage of 130 mV in a known magnetic field of 15 mT. Calculate the unknown magnetic field strength when the probe measures 1170 mV.
  19. 5(c)(i)2 marksDraw a labelled diagram to show the relationship between the two fields.
  20. 5(c)(ii)3 marksWrite equations for the forces on the ions caused by the electric field and the magnetic field and hence calculate the electric field strength E.
  21. 5(d)5 marksCalculate the velocity, v, of the strip.
  22. 6(a)8 marksDraw a labelled diagram of a transformer suitable for transforming from 240 V a.c. to 12 V a.c. Give details of the materials used in its structure and reasons for their choice.
  23. 6(b)(i)2 marksCalculate the peak value of the primary voltage.
  24. 6(b)(ii)2 marksCalculate the turns ratio N_p / N_s of the transformer.
  25. 6(b)(iii)2 marksCalculate the power that must be supplied to the transformer when the secondary current is 10 mA.
  26. 6(b)(iv)2 marksCalculate the current rating of the fuse to be used in the primary circuit.
  27. 6(c)4 marksCalculate what percentage of the power transmitted is lost in the cables.
  28. 7(a)(i)1 markWhat is the name given to this type of circuit?
  29. 7(a)(ii)2 marksName the logic gate used in the circuit and write out its truth table.
  30. 7(a)(iii)2 marksCopy and complete the sequential truth table (Table 4) to show the action of the circuit in Figure VIII.
  31. 7(a)(iv)3 marksBy considering the role of feedback in this circuit and the condition for the gate to have a logic 0 output, explain why the output does not change when the input changes in the second step of the sequence (Row 2) in…
  32. 7(b)(i)1 markBefore going to bed the householder closes the window and presses and releases the reset switch. Making reference to the sequential truth table in 7(a)(iii), explain how this 'sets' the alarm so that it is ready to be…
  33. 7(b)(ii)1 markWhy does the alarm sound when a burglar opens the window?
  34. 7(b)(iii)1 markExplain why the alarm stays on even when the burglar closes the window.
  35. 7(b)(iv)1 markHow does the householder turn off the alarm?
  36. 7(c)(i)4 marksDraw the circuit for a half-adder. Explain, with the aid of a truth table, what its function is and how it performs that function.
  37. 7(c)(ii)4 marksDraw a table to show the outputs at points P, Q, R and S for the input states: A. I_1 = 1, I_2 = 0, I_3 = 1; B. I_1 = 1, I_2 = 1, I_3 = 1.
  38. 8(a)(i)3 marksDefine the terms: 'work function', 'threshold frequency', and 'stopping potential' as applied in describing the photoelectric effect.
  39. 8(a)(ii)1 markWhat property of light does the photoelectric effect display?
  40. 8(b)(i)2 marksWhat conclusions can be drawn from this plot?
  41. 8(b)(ii)2 marksExplain how the maximum kinetic energy and maximum velocity of the photoelectrons can be deduced from this plot.
  42. 8(c)(i)2 marksCalculate the intensity of light available for the photoelectric effect.
  43. 8(c)(ii)4 marksCalculate the number of electrons emitted per second.
  44. 8(c)(iii)3 marksCalculate the work function in electron volts for iron.
  45. 8(c)(iv)3 marksCalculate the stopping potential for this radiation.
  46. 9(a)(i)3 marksExplain what is meant by 'nuclear fusion' and 'nuclear fission' and state which process is responsible for the energy release of the Sun.
  47. 9(a)(ii)2 marksExplain why a neutron would penetrate farther into a sample of matter than an alpha particle of the same energy.
  48. 9(a)(iii)3 marksWhat does the binding energy per nucleon versus mass number curve indicate about the stability of nuclei and the processes by which nuclei achieve this stability?
  49. 9(b)(i)3 marksHow many atoms are contained in 1.0 kg of Uranium-235?
  50. 9(b)(ii)7 marksUsing the masses given, calculate the energy, in joules, released by 1.0 kg of Uranium-235 by fission.
  51. 9(b)(iii)2 marksUsing your answer to (ii) above, explain why nuclear fission is such a desirable source of energy.

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