CAPE Physics Unit 2 · 2009 · 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)(i)1 markSketch the I-V characteristic graph of a metallic conductor at constant temperature.
2. 1(a)(ii)1 markSketch the I-V characteristic graph of a filament bulb.
3. 1(b)(i)2 marksDraw a potential divider circuit suitable for investigating the I-V characteristics of the diode.
4. 1(b)(ii)2 marksDescribe how experimental readings would be taken using the potential divider circuit.
5. 1(c)(i)3 marksUse the data presented in Figure 1 to determine the value of n in the relation I = k * V^n.
6. 1(c)(ii)2 marksDeduce the actual equation relating current, I, to voltage, V, for this diode.
7. 1(c)(iii)2 marksCalculate the d.c. resistance of the diode at I = 0.32 A.
8. 1(c)(iv)2 marksSuggest an improved method of processing the experimental data to determine the values of n and k.
9. 2(a)(i)1 markComplete the truth table to show the action of a NOR gate.
10. 2(a)(ii)1 markDraw a diagram showing how a NOR gate can be connected to function as a NOT gate.
11. 2(a)(iii)4 marksAdd connecting wires to the provided diagram of four NOR gates (Figure 2) to show how they can be connected together to form a NAND gate.
12. 2(b)(i)1 markState the logic state of B when switch S2 is closed.
13. 2(b)(ii)5 marksComplete the truth table in Figure 4 for the logic circuit.
14. 2(b)(iii)1 markState which logic combination of S1 and S2 will cause the lamp to be ON.
15. 2(b)(iv)2 marksDraw a logic circuit showing how NAND gates exclusively can be used to perform the identical function of the circuit in Figure 3.
16. 3(a)(i)3 marksEinstein's photoelectric equation is given by K_max = h*f - phi. Clearly explain each term used in this equation.
17. 3(a)(ii)2 marksSketch a labelled graph of photocurrent versus applied voltage for two light intensities I1 and I2 (where I2 > I1), clearly marking the stopping potential.
18. 3(b)(i)1 markComplete the table by calculating and filling in the values of frequency f corresponding to each wavelength.
19. 3(b)(ii)3 marksPlot a graph of stopping potential Vs versus frequency f on the grid provided and draw the best straight line through the points.
20. 3(b)(iii)a)3 marksFrom your plotted graph, determine Planck's constant.
21. 3(b)(iii)b)1 markFrom your plotted graph, determine the threshold frequency.
22. 3(b)(iii)c)2 marksFrom your plotted graph, determine the work function of the metal.
23. 4(a)(i)2 marksDistinguish between 'magnetic flux density' and 'magnetic flux'.
24. 4(a)(ii)1 markState Faraday's law of electromagnetic induction.
25. 4(a)(iii)1 markState Lenz's law.
26. 4(b)(i)2 marksExplain why an e.m.f. is generated between the axle and the rim of the disc as it rotates.
27. 4(b)(ii)a)2 marksCalculate the magnetic field within the solenoid.
28. 4(b)(ii)b)2 marksCalculate the magnetic flux cut by the disc in every revolution.
29. 4(b)(ii)c)2 marksCalculate the potential difference maintained between the rim and the axle of the disc.
30. 4(c)3 marksDescribe how the apparatus in Figure 5 could verify Faraday's law: sketch the expected graph of e.m.f. versus motor speed, explain how the conclusion is drawn from the graph, and state which factors must be held…
31. 5(a)(i)1 markState the type of amplifier configuration shown in Figure 7.
32. 5(a)(ii)2 marksExplain what is meant by 'negative feedback'.
33. 5(a)(iii)2 marksCalculate the bandwidth of the amplifier circuit shown in Figure 7.
34. 5(b)(i)2 marksCalculate the peak output voltage when the frequency is 500 Hz.
35. 5(b)(ii)2 marksCalculate the peak output voltage when the frequency is 10 000 Hz.
36. 5(c)(i)1 markDetermine the frequency of this input signal.
37. 5(c)(ii)2 marksFind the output of the amplifier at t = 5 ms.
38. 5(c)(iii)3 marksSketch a graph showing the shape of the output waveform from the amplifier.
39. 6(a)5 marksExplain the terms 'decay constant' (lambda) and 'half life' (T_1/2). Starting with N = N0 * e^(-lambda * t), derive an equation relating these two quantities.
40. 6(b)(i)1 markCalculate the decay constant in units of s^-1.
41. 6(b)(ii)2 marksCalculate the number of atoms present in a 1.0 mg sample of sodium-24.
42. 6(b)(iii)2 marksCalculate the activity of a 1.0 mg pure sample of sodium-24.
43. 6(c)5 marksA small volume of sodium-24 solution having an initial activity of 1.2 * 10^4 disintegrations per minute was injected into a patient's bloodstream. After 30 hours, the activity of 1.0 cm^3 of the blood was measured as…