CAPE Physics Unit 2 · 2014 · 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 choiceWhen a potential difference of 2\text{ V} is applied across a resistor, 10\text{ J} of energy are converted to thermal energy. What charge flows through the resistor?
2. Q21 mark · multiple choiceA light bulb uses a 3\text{V} supply and takes a current of 0.2\text{ A}. It is switched on for one minute. How much electrical energy is used?
3. Q31 mark · multiple choiceGiven that a wire of length, L, and cross-sectional area, A, has resistance, R, what is the resistance of a wire of similar material which is twice as long and half the diameter?
4. Q41 mark · multiple choiceThe unit for resistivity is
5. Q51 mark · multiple choiceThe graph above is the I\text{-}V curve for a specially constructed device. At which part of the graph does the device act as an ohmic conductor?
6. Q61 mark · multiple choiceKirchhoff's second law states that the algebraic sum of the potential differences around a complete circuit must equal zero. This is a consequence of conservation of
7. Q71 mark · multiple choiceThe current flowing through the 6\ \Omega resistor is
8. Q81 mark · multiple choiceWhich of the following units is equivalent to the tesla?
9. Q91 mark · multiple choiceCoulomb's law states that the force between two point charges is directly proportional to
10. Q101 mark · multiple choiceWhich of the following diagrams BEST describes the path of an electron travelling through an electric field?
11. Q111 mark · multiple choiceFigure 1 shows a parallel plate capacitor with the space between the plates filled with air. Figure 2 shows the same capacitor with the space between the plates filled with a dielectric whose permittivity is twice that…
12. Q121 mark · multiple choiceA conductor of length 0.10\text{ m} is placed in a magnetic field of strength 9\text{ mT} at an angle of 60^\circ to the field direction. If it has a current of 2\text{ A}, then the force on the conductor due to…
13. Q131 mark · multiple choiceConsider a current-carrying conductor, XY, placed between the poles of a magnet as shown below. In which orientation would the wire experience the GREATEST force?
14. Q141 mark · multiple choiceWhat is the magnetic flux density at the end of a solenoid, given that the number of turns is 12 and the current passing is 3\text{ A}? (Assume \mu_0 = 4\pi \times 10^{-7}\text{ H m}^{-1}.)
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 are the current…
16. Q161 mark · multiple choiceAC current may be represented by the equation, I = I_0 \sin \omega t. What term describes the quantity I_0?
17. Q171 mark · multiple choiceIn a p-type semiconductor, the majority charge carriers are
18. Q181 mark · multiple choiceThe effective value of a sinusoidal alternating curve with a peak current, I_0, is
19. Q201 mark · multiple choiceAn example of an INPUT transducer is a
20. Q211 mark · multiple choiceWhich of the following devices is associated with a depletion layer?
21. Q221 mark · multiple choiceThe potential divider in the figure above is formed from a light dependent resistor (LDR) and a resistor (R). The LDR has a resistance of 5\ 000\ \Omega in the dark and 50\ \Omega in bright light. The potential at…
22. Q231 mark · multiple choiceAn operational amplifier circuit has a gain of 10^5 and a bandwidth of 10^3\text{ Hz}. What is the approximate bandwidth when the gain is reduced to 10?
23. Q241 mark · multiple choiceWhich of the following gain–frequency graphs BEST represents that of an ideal operational amplifier?
24. Q251 mark · multiple choiceFrom the information given in the operational amplifier circuit above, the current in the 6.0\text{ k}\Omega load resistor is
25. Q261 mark · multiple choiceWhat are the possible values of R_1, R_2 and R_3 if the output voltage, V_{\text{out}} = -(3V_1 + 4V_2)?
26. Q271 mark · multiple choiceWhich of the following features relates to the amplifier in the diagram above?
27. Q281 mark · multiple choiceThe values for the resistors may be changed. Which of the following pairs of values for R_1 and R_2 would give the amplifier the LARGEST bandwidth?
28. Q291 mark · multiple choiceWhich of the following circuits shows the correct NOR gate equivalent of the given logic gate?
29. Q301 mark · multiple choiceWhich of the following circuits is correct for a half-adder?
30. Q311 mark · multiple choiceAn atom makes a transition from an energy state, E_2, to a lower energy state, E_1. Which of the following expressions gives the frequency of radiation emitted in terms of Planck's constant, h?
31. Q321 mark · multiple choiceWhich scientist used the quantum theory to explain the photoelectric effect?
32. Q331 mark · multiple choiceA metal surface has a work function of 3.8\text{ eV}. Determine the threshold wavelength for this metal.
33. Q341 mark · multiple choiceWhat is the linear absorption coefficient of a material of thickness 10\text{ cm} that reduces the incident X-ray intensity to half of its original value?
34. Q351 mark · multiple choiceAn experiment to investigate the photoelectric effect was performed and a graph showing the energy of photoelectrons versus frequency of incident radiation plotted as shown below. If e is electronic charge, V_s is…
35. Q361 mark · multiple choiceAn isotope of radium is represented by ^{224}_{88}\text{Ra}. Which row in the table above correctly describes a neutral atom of this isotope?
36. Q371 mark · multiple choiceWhich two scientists conducted an experiment which proved that the nucleus of an atom is very small and positively charged?
37. Q381 mark · multiple choiceWhich statement about the behaviour of the oil drops during the experiment is correct?
38. Q391 mark · multiple choiceWhat is the mass equivalent, in kg, of Q?
39. Q401 mark · multiple choiceWhat does \lambda in the equation N = N_0\ e^{-\lambda t} represent?
40. Q411 mark · multiple choiceThe mass defect for the nucleus of helium-4 is 0.0303\text{ u}. What is the binding energy per nucleon for helium-4?
41. Q421 mark · multiple choiceRadioactive lead, ^{211}_{82}\text{Pb}, decays by two beta particles and one alpha particle. What is the resulting nuclide?
42. Q431 mark · multiple choiceThe half-life of a sample of radioactive substance is 100\text{ years}. What is its decay constant?
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?