CAPE Physics Unit 2 · 2011 · Paper 2

35 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)2 marksDefine magnetic flux density, B, in terms of the force on a current-carrying wire.
2. 1(b)4 marksDraw the resultant magnetic field pattern between the two flat permanent magnets in Figure 1 (b) with wire P carrying current perpendicularly into the plane of the paper, and indicate the direction of motion of the wire…
3. 1(c)(i)1 markState the direction of the magnetic field.
4. 1(c)(ii)4 marksBy considering the forces on EACH electron, show that the magnetic flux density is given by B = V / (v d).
5. 1(c)(iii)2 marksGiven that V = 3500 V, v = 2.8 * 10^7 m s^-1, and d = 50 mm, calculate the magnetic flux density of the magnetic field.
6. 1(c)(iv)2 marksThe magnetic flux density is now doubled. The distance between the plates is then adjusted so that no deflection occurs. Calculate the new distance.
7. 2(a)(i)1 markWhat does the term 'bistable' mean when used in reference to an electronic circuit?
8. 2(a)(ii)5 marksOn Figure 2 (a), draw connecting wires to show the construction of an S-R flip-flop with inputs I_1 and I_2 and outputs Q and Q_bar. Complete the sequential truth table and describe how this circuit acts as an…
9. 2(b)4 marksDraw the truth table for the circuit using input waveforms A and B and resulting output waveform D shown in Figure 2 (b), and hence state the equivalent logic gate.
10. 2(c)(i)1 markWhat is the frequency of the XOR output?
11. 2(c)(ii)1 markIf the same frequency is input but the other input to the XOR is tied to 5 V, what is the frequency of the output?
12. 2(c)(iii)3 marksThe same square wave is applied to one input of logic gate P while the other input is grounded. The output waveform is a flat line at 0 V. State the name of logic gate P and use a truth table to explain your answer.
13. 3(a)3 marksIdentify EACH type of radiation stopped by the respective materials in Figure 3 (a) by writing the name of the radiation next to the corresponding arrow.
14. 3(b)(i)1 markExpress the relationship between intensity, C, of gamma rays and corrected distance, (d - x), mathematically.
15. 3(b)(ii)2 marksShow that a straight line graph would be expected if d were plotted against 1 / sqrt(C).
16. 3(b)(iii)2 marksComplete Table 1 to show the data that must be plotted to obtain the graph of d against 1 / sqrt(C).
17. 3(b)(iv)5 marksOn the graph paper provided on page 11, plot the graph of d against 1 / sqrt(C).
18. 3(b)(v)2 marksDetermine, from the graph, the value of x.
19. 4(a)3 marksDerive an equation for the equivalent capacitance of two capacitors connected in series.
20. 4(b)4 marksA 'black box' contains a 4.7 microfarad capacitor in series with an unknown capacitor C. It was connected to a battery with emf E and discharged through a 10 M-ohm resistor. Describe, with the aid of a circuit diagram,…
21. 4(c)(i)4 marksCalculate the gradient of the graph in Figure 4 and hence determine the time constant of the circuit.
22. 4(c)(ii)3 marksCalculate the value of the unknown capacitance, C.
23. 4(c)(iii)1 markDetermine the value of the unknown source of emf, E.
24. 5(a)(i)2 marksExplain the terms 'bandwidth' and 'feedback' as applied to operational amplifiers (op-amps).
25. 5(a)(ii)3 marksSketch, on the same axes, the input waveform and the output waveform produced from the open-loop op-amp circuit in Figure 5 (a).
26. 5(a)(iii)2 marksExplain the shape of the waveform shown in Figure 5 (b) when a constant voltage of 0.5 V is applied to non-inverting terminal Q.
27. 5(b)(i)3 marksDraw the resulting circuit and state the name of this type of circuit.
28. 5(b)(ii)3 marksCalculate the voltage gain of the circuit.
29. 5(b)(iii)2 marksCalculate the MAXIMUM input voltage for no saturation at the output.
30. 6(a)(i)1 markExplain what is meant by 'nuclear fission'.
31. 6(a)(ii)3 marksSketch a graph to show how the binding energy per nucleon varies with the mass number of the nucleus. Show on the graph the approximate positions of carbon-12 and uranium-235.
32. 6(a)(iii)2 marksUse your graph to explain why energy is released when a heavy nucleus undergoes fission.
33. 6(b)(i)4 marksCalculate the mass of oil used per day by the power station.
34. 6(b)(ii)4 marksCalculate the mass of uranium used per day by the power station.
35. 6(c)1 markHence comment on the sustainability of using oil as an energy source for the next century.