CAPE Physics Unit 2 · 2013 · Paper 1

45 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 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?
3. Q31 mark · multiple choiceGiven that a wire of length, L, and 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 choiceFor the circuit diagram below, determine the current flowing through the 6\,\Omega resistor.
5. Q51 mark · multiple choiceIn SI, the unit of electric field strength is
6. Q61 mark · multiple choiceThe expression used to determine the output voltage is
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 choiceThe work done per unit charge in bringing a small positive charge from infinity to a point is the definition of
9. Q91 mark · multiple choiceOne farad is equivalent to
10. Q101 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?
11. Q111 mark · multiple choiceThe capacitor in the circuit above has capacitance, C. It is charged to a voltage, V, and then discharged through a resistor with resistance, R. The charge at any time, t, is given by
12. Q121 mark · multiple choiceWhich of the following diagrams shows the correct direction of the forces on two wires carrying current in opposite directions?
13. Q131 mark · multiple choiceA road is 15\text{ m} below a transmission line which carries an alternating current of peak value 100\text{ A}. The magnitude of the peak magnetic flux density at the road (due to the current in the transmission…
14. Q141 mark · multiple choiceThe iron core of a transformer is laminated because
15. Q151 mark · multiple choiceThe diagrams below show a bar magnet being inserted or withdrawn from a solenoid. In which diagram is the current flow correct?
16. Q161 mark · multiple choiceA.C. may be represented by the equation, I = I_0 \sin \omega t. I_0 is
17. Q171 mark · multiple choiceThe equation which represents this alternating current is
18. Q181 mark · multiple choiceA sinusoidal signal has a peak voltage of 5.0\text{ V}. What is the r.m.s value of this signal?
19. Q191 mark · multiple choiceIn which of the circuits below is the capacitor connected to give a smooth rectified output voltage across the load (R)?
20. Q201 mark · multiple choiceIf V_s = \pm 9\text{ V} what is the value of V_o?
21. Q211 mark · multiple choiceWhich one of the circuits is NOT a non-inverting amplifier?
22. Q221 mark · multiple choiceWhich of the labelled points could be called a virtual earth?
23. Q231 mark · multiple choiceFrom the information given in the operational amplifier circuit, the current in the 6.0\text{ k}\Omega load resistor is
24. Q241 mark · multiple choiceIf the wires are connected as shown, which indicators will be on?
25. Q251 mark · multiple choiceThe circuit represents
26. Q261 mark · multiple choiceWhich is the correct truth table for the circuit above?
27. Q271 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 one of the following graphs…
28. Q281 mark · multiple choiceWhich of the following statements is correct about the amplifier in the diagram above?
29. Q291 mark · multiple choiceTwo four-bit binary numbers are fed in series into the inputs, X and Y, on an AND gate. The numbers are represented by the pulse trains in the V-t diagrams shown below. Which of the following pulse trains represents…
30. Q301 mark · multiple choiceWhich of the following diagrams is the correct circuit for a half-adder?
31. Q311 mark · multiple choiceLight falls on a photoelectric material and no electrons are emitted. Electrons may be emitted if which of the following is/are increased? I. The intensity of the light II. The frequency of the light III. The…
32. Q321 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?
33. Q331 mark · multiple choiceA metal surface has a work function of 3.8\text{ eV}. What is the threshold wavelength for this metal?
34. Q341 mark · multiple choiceAn electron has kinetic energy of 8 \times 10^{-18}\text{ J}. What is this value in electron-volts?
35. Q351 mark · multiple choiceWhat is the de Broglie wavelength of an olympic sprinter of mass 60\text{ kg} when running at a speed of 10\text{ m s}^{-1}?
36. Q361 mark · multiple choiceWhich of the following demonstrates the particle nature of electromagnetic radiation?
37. Q371 mark · multiple choiceEach of the following particles is moving at 0.2c, where c is the speed of electromagnetic radiation. Which particle has the longest de Broglie wavelength associated with it?
38. Q381 mark · multiple choiceWhich statement about the behaviour of the oil drops during the experiment is correct?
39. Q391 mark · multiple choiceThe fission of uranium-235 can be represented by the nuclear equation {}^{235}_{92}\text{U} \rightarrow {}^{140}_y\text{Ce} + {}^x_{40}\text{Zr} + {}^1_0\text{n} Which combination gives the correct ratio of $y :…
40. Q401 mark · multiple choiceWhich of the following statements is true?
41. Q411 mark · multiple choiceThe equation below 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} + Q For the above equation mass of…
42. Q421 mark · multiple choiceA radium source is placed in a magnetic field as shown below. The field acts into the page. At what position would a \beta-particle be detected?
43. Q431 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?
44. Q441 mark · multiple choiceWhich of the following statements are true about 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…
45. Q451 mark · multiple choiceThe half-life of a sample of radioactive substance is 100\text{ years}. What is its decay constant?