CAPE Physics Unit 2 · 2015 · Paper 1

41 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 thermistor is used in the circuit as shown above. It is found that there is a current of 80\text{ mA} from the supply. What is the current through the thermistor?
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 choiceIf all the resistors have equal resistance, R, what is the effective resistance between AB?
5. Q51 mark · multiple choiceIf the resistances X, P, Q and R are such that no current flows through the galvanometer, the bridge is said to be balanced. Which of the following relationships BEST represents the ratio \frac{X}{R}?
6. Q61 mark · multiple choiceThe formula 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 choiceDiagram 1 shows a parallel plate capacitor with the space in between the plates filled with air. Diagram 2 shows the same capacitor with the space in between the plates filled with a dielectric whose permittivity is…
10. Q101 mark · multiple choiceThe energy stored in a capacitor is given by
11. Q121 mark · multiple choiceWhich of the following diagrams shows the correct direction of the forces on two wires carrying current in opposite directions?
12. Q131 mark · multiple choiceA uniform magnetic field of flux density, Z, passes normally through the area, Y. Within this area lies a coil of 64 turns of copper wire, each of area \frac{1}{8}Y. What is the magnetic flux linkage for this…
13. Q141 mark · multiple choiceWhich of the following diagrams BEST illustrates the magnetic flux pattern due to a current in a solenoid?
14. Q161 mark · multiple choiceIn the equation I = I_0 \sin \omega t for an alternating current, the symbol I_0 represents the
15. Q171 mark · multiple choiceWith the LDR in complete darkness, the voltage across it is 10\text{ V}. When fully illuminated, the voltage across it drops to 3\text{ V}. What will be the current in the 2\text{ k}\Omega resistor at that time?…
16. Q181 mark · multiple choiceA sinusoidal signal has a peak voltage of 5.0\text{ V}. What is the root mean square value of this signal?
17. Q191 mark · multiple choiceThe supply voltage to the op-amp is \pm 9\text{ V}. If the open loop gain is 10^5, what is the maximum input voltage swing for linear amplification?
18. Q201 mark · multiple choiceIf the input voltages, V_1 and V_2, are given as 2\,\mu\text{V} and 6\,\mu\text{V} respectively and the open loop gain is A_0, what is the value of V_0?
19. Q211 mark · multiple choiceThe gain of this amplifier is given by
20. Q221 mark · multiple choiceWhich of the labelled points could be called a virtual earth?
21. Q231 mark · multiple choiceGiven that V_{\text{in}} = 6\,\mu\text{V}, what is the output, V_{\text{out}}, of the cascaded amplifiers?
22. Q241 mark · multiple choiceWhat would be the output, V_0, given that V_1 = V_3 = 1\text{ V}, and V_2 = 0?
23. Q251 mark · multiple choiceThe circuit represents
24. Q261 mark · multiple choiceIn the amplifier circuit shown above, the LED comes on when
25. Q271 mark · multiple choiceThe sinusoidal alternating voltage shown in Diagram 2 is applied to the input of the operational amplifier shown in Diagram 1. The voltage of the power supply is \pm 15\text{ V}. Which of the following graphs…
26. Q281 mark · multiple choiceWhich single gate is the same as this network?
27. Q291 mark · multiple choiceFor the inputs shown in the circuit, the outputs are
28. Q301 mark · multiple choiceWhich of the following diagrams is the correct circuit for a half adder?
29. Q311 mark · multiple choiceA monochromatic light source emits 0.5\text{ watts} of power. The light has a frequency of 5.0 \times 10^{15}\text{ Hz} and 1\% of the photons fall on a photocell. The number of photons incident on the photocell…
30. 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?
31. Q331 mark · multiple choiceBinding energy is equivalent to the mass
32. Q341 mark · multiple choiceThe intensity of X-rays passing through a material of thickness, x, is given by \[I = I_0 e^{-\mu x}.\] What does the symbol '\mu' in the equation represent?
33. 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}?
34. Q361 mark · multiple choiceHow much energy would be released in a nuclear fission reaction if the mass defect is 0.00687\text{ u}?
35. 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?
36. Q381 mark · multiple choiceIsotopic forms of an element have different atomic masses. The atoms of each isotope of an element have the same
37. Q391 mark · multiple choiceWhich of the following equations represents the radioactive disintegration of Polonium-210 by \alpha-emission to a stable isotope of lead?
38. Q401 mark · multiple choiceWhich of the following statements is true?
39. Q411 mark · multiple choiceRadioactive decay is the
40. Q431 mark · multiple choiceThe activity of a radioactive isotope is found to fall to \frac{1}{16} of its initial value in 2\text{ hours}. What is the half-life of the isotope?
41. 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…