CAPE Physics Unit 2 · 2010 · Paper 1

44 multiple-choice items from this paper. Open one to see it in full, then practise it on Quelpr and get it marked against the mark scheme.

1. Q11 mark · multiple choiceIn the equation for the current through a conductor I = nevA, v represents the
2. Q21 mark · multiple choiceThe current flowing through a piece of copper wire can be increased if
3. Q31 mark · multiple choiceThe above diagram is the I-V curve for a specially constructed device. In which part of the graph does the device act as an ohmic conductor?
4. Q41 mark · multiple choiceThe potential divider shown below is designed to provide a variable output potential difference. Which combination suggests the available range of output?
5. Q51 mark · multiple choiceWhich of the following CANNOT be inferred from Coulomb's law? The force between charges depends on
6. Q61 mark · multiple choiceThe diagram shows a positively charged sphere Q suspended by a light insulated string placed between two metal plates X and Y. When the switch S is closed, the initial movement of the sphere is towards
7. Q71 mark · multiple choiceWhat is the electric potential 25\text{ cm} from a point charge of 6 \times 10^{-8}\text{ C}?
8. Q81 mark · multiple choiceA capacitor of capacitance 100\text{ }\mu\text{F} is fully charged by a 200\text{ V} battery. How much energy is stored by the capacitor?
9. Q91 mark · multiple choiceThe diagram shows two capacitors of different capacitances C_1 and C_2 connected in parallel to a d.c. source. Which statement is correct?
10. Q101 mark · multiple choiceA flat circular coil with 150 turns has a radius of 4.0\text{ cm}. When a current of 3.0\text{ A} is passed through the coil, the magnetic field strength at the centre of the coil is
11. Q111 mark · multiple choiceA wire carrying current into the plane of the paper is shown below. It is acted upon, in turn, by four magnetic fields acting in the directions shown. Which field exerts on the wire a force towards point P?
12. Q121 mark · multiple choiceA conductor of length 0.10\text{ m} is placed in a magnetic field of 9\text{ mT} at an angle of 60^\circ to the field direction. It has a current of 2\text{ A}. Calculate the force on the conductor due to the…
13. Q131 mark · multiple choiceThe unit of magnetic flux density is
14. Q141 mark · multiple choiceThe iron core of a transformer is laminated because
15. Q151 mark · multiple choiceAn ideal transformer has 600 turns in the primary winding and 40 turns in the secondary winding. If the current in the primary winding is 5\text{ A}, and the primary voltage is 120\text{ V}, what is the current and…
16. Q161 mark · multiple choiceA.C. may be represented by the following equation. I = I_0 \sin \omega t. I_0 is
17. Q171 mark · multiple choiceThe equation to represent the alternating current is
18. Q181 mark · multiple choiceIn which of the circuits below is the capacitor connected to give a smooth rectified output voltage across the load (R)?
19. Q191 mark · multiple choiceWhich of the following graphs represents the output across R_L?
20. Q201 mark · multiple choiceA sinusoidal signal has a peak voltage of 5.0\text{ V}. What is the r.m.s value of this signal?
21. Q211 mark · multiple choiceIf V_s = \pm 9\text{ V} what is the value of V_o?
22. Q221 mark · multiple choiceWhich of the following options is correct for a non-inverting amplifier circuit constructed using an operational amplifier?
23. Q231 mark · multiple choiceAn operational amplifier circuit has a gain of 10^3 and a bandwidth of 10^3\text{ Hz}. What is the approximate bandwidth when the gain is reduced to 10?
24. Q241 mark · multiple choiceWhich of the labelled points could be called a virtual earth?
25. Q251 mark · multiple choiceFrom the information given in the operational amplifier circuit above, determine the magnitude of the current through the feedback resistor.
26. Q261 mark · multiple choiceIf the wires are connected as shown which indicators will be on?
27. Q271 mark · multiple choiceWhich of the following statements is correct for the amplifier in the diagram above?
28. Q281 mark · multiple choiceA full adder may be constructed from two half adders and a logic gate. The gate is
29. Q291 mark · multiple choiceTwo four-bit binary numbers are fed into the inputs X and Y of an OR gate. The numbers are represented by the pulse trains in the V-t diagrams below. Which of the following pulse trains represents the output pulse from…
30. Q301 mark · multiple choiceWhich of the following diagrams is the correctly labelled circuit for a half-adder?
31. Q311 mark · multiple choiceWhich of the following observations is/are associated with the photoelectric effect? I. Photoelectrons are emitted from the surface of the metal as soon as light of frequency greater than the threshold frequency is…
32. Q321 mark · multiple choiceWhich scientist proposed a quantum theory to explain the photoelectric effect?
33. Q331 mark · multiple choiceA metal surface has a work function of 3.8\text{ eV}. Determine the threshold wavelength for this metal.
34. Q341 mark · multiple choiceWhich of the following graphs represents the correct relationship between photoelectric current and intensity of incident radiation?
35. Q351 mark · multiple choiceAn experiment to investigate the photoelectric effect was performed and a graph of energy of photoelectrons vs frequency of incident radiation plotted as shown below. If e is electronic charge, V_s is stopping…
36. Q361 mark · multiple choiceMillikan's oil drop experiment gives evidence
37. Q371 mark · multiple choiceAn experiment to investigate the absorption of \gamma-rays in air using ^{60}\text{Co} as the source is illustrated in the diagram below. x is the distance between the source and region in the G-M tube where…
38. Q391 mark · multiple choiceWhich of the following statements is true?
39. Q401 mark · multiple choiceThe equation shows the disintegration of Polonium - 210 to a stable isotope of lead ^{210}_{84}\text{Po} \rightarrow {^{206}_{82}\text{Pb}} + {^4_2\text{He}} + \Delta Q For the above equation mass of…
40. Q411 mark · multiple choiceA radium source is placed in a magnetic field as shown below. The magnetic field acts into the page. At what position would a \beta-particle be detected?
41. Q421 mark · multiple choiceThe activity of a radioactive isotope is found to fall to \frac{1}{16} of its initial value in 2\text{ hrs}. What is the half-life of the isotope?
42. Q431 mark · multiple choiceRadioactive lead, ^{211}_{82}\text{Pb} decays by two beta particles and one alpha particle. What is the resulting nuclide?
43. Q441 mark · multiple choiceThe activity of a radioactive source is
44. Q451 mark · multiple choiceIn medicine radioactive isotopes are often used as tracers to help in locating blockages in the human body. Which of the following isotopes would be MOST suitable for such an application?