CAPE Physics Unit 2 · 2012 · 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 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 choiceWhat is the value of x if the galvanometer reads zero?
5. Q51 mark · multiple choiceA proton is projected with velocity, v, between two parallel plates which have a potential difference of 400\text{ V} between them as shown above. While passing between the plates, the motion of the proton may be…
6. Q61 mark · multiple choiceThe work done per unit charge in bringing a small positive charge from infinity to a point is the definition of
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, C, is made using two parallel metal plates separated by 1\text{ mm} in air. The area of overlap of the plates is 20\text{ cm}^2. If the distance between the plates is increased to…
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 choiceWhich of the following units is equivalent to the tesla?
11. Q111 mark · multiple choiceWhich of the following diagrams shows the correct direction of the forces on two wires carrying current in opposite directions?
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 choiceWhat is the direction of the resultant force on P when the magnetic field shown is switched on?
14. Q141 mark · multiple choiceThe iron core of the transformer in the diagram above is laminated because
15. Q161 mark · multiple choiceA.C. may be represented by the following equation, I = I_0 \sin \omega t. I_0 is
16. Q171 mark · multiple choiceWhat is the current in the 10\ \Omega resistor?
17. Q181 mark · multiple choiceIn which of the circuits below is the capacitor connected to give a smooth rectified output voltage across the load (R)?
18. Q191 mark · multiple choiceWhich of the following diagrams shows the correct arrangement for a full wave rectifier circuit?
19. Q201 mark · multiple choiceAn example of an INPUT transducer is a
20. Q211 mark · multiple choiceIf V_s = \pm 9\text{ V}, what is the value of V_{\text{out}} when the input voltage is 1.2\text{ V}?
21. Q221 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?
22. 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?
23. Q241 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)?
24. Q251 mark · multiple choiceFrom the information given in the operational amplifier circuit above, determine the magnitude of the current through the feedback resistor.
25. Q261 mark · multiple choiceThe sinusoidal alternating voltage shown in Figure 2 is applied to the input of the operational amplifier shown in Figure 1. The voltage of the power supply is \pm 15\text{ V}. Which of the following graphs correctly…
26. Q271 mark · multiple choiceWhich of the following shows the correct NOR gate equivalent of the given logic gate?
27. Q281 mark · multiple choiceIf wires are connected as shown, which indicators will be on?
28. Q291 mark · multiple choiceWith inputs I_1 and I_2 and output Q, the whole circuit could be replaced by
29. Q301 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. Q311 mark · multiple choiceWhen the photocell is illuminated with ultraviolet light and photoelectrons are emitted, corresponding current and voltage values are plotted. Which graph correctly shows the relationship between I and V?
31. Q321 mark · multiple choiceWhich scientist proposed a quantum theory to explain the photoelectric effect?
32. Q331 mark · multiple choiceIn an experiment investigating the photoelectric emissions from a metal, the stopping potential was found to be 3.0\text{ V} when light of frequency 7.5 \times 10^{14}\text{ Hz} was used. What is the work function…
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 of energy of photoelectrons versus frequency of incident radiation plotted as shown below. If e is electronic charge, V_s is stopping…
35. Q361 mark · multiple choiceWhich of the following demonstrate the particle nature of electromagnetic radiation?
36. Q371 mark · multiple choiceWhich two scientists conducted an experiment which proves 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 choiceWhich of the following statements is true?
39. Q401 mark · multiple choiceRadioactive lead, ^{211}_{82}\text{Pb} decays by two beta particles and one alpha particle. What is the resulting nuclide?
40. Q411 mark · multiple choiceWhen a radioactive nucleus decays an amount of energy, E, is released. At the same time, a small amount of mass, m, is lost. Which of the following gives the amount of energy released?
41. Q421 mark · multiple choiceThe activity of a radioactive source is the
42. Q431 mark · multiple choiceThe following statements refer to radioactive decay. I. It is a random process. II. It is a spontaneous process. III. It is dependent on the chemical combination of radioactive elements. IV. It increases with…
43. Q441 mark · multiple choiceA freshly made sample of radioactive material gives a count rate of 8000\text{ counts per minute}. After twenty days, it gives a count rate of 500\text{ counts per minute}. What is the half-life of the material?
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?