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1 * * ambridge International Examinations ambridge International dvanced Subsidiary and dvanced Level PHYSIS 9702/3 Paper Multiple hoice May/June 204 dditional Materials: Multiple hoice nswer Sheet Soft clean eraser Soft pencil (type or H is recommended) hour RE THESE INSTRUTIONS FIRST Write in soft pencil. o not use staples, paper clips, glue or correction fluid. Write your name, entre number and candidate number on the nswer Sheet in the spaces provided unless this has been done for you. O NOT WRITE IN NY ROES. There are forty questions on this paper. nswer all questions. For each question there are four possible answers,, and. hoose the one you consider correct and record your choice in soft pencil on the separate nswer Sheet. Read the instructions on the nswer Sheet very carefully. Each correct answer will score one mark. mark will not be deducted for a wrong answer. ny working should be done in this booklet. Electronic calculators may be used. This document consists of 22 printed pages and 2 blank pages. I4 06_9702_3/3RP ULES 204 [Turn over

2 2 ata speed of light in free space, c = m s permeability of free space, µ 0 = 4π 0 7 H m permittivity of free space, ε 0 = F m ( = m F ) 4πε 0 elementary charge, the Planck constant, unified atomic mass constant, rest mass of electron, rest mass of proton, e = h = J s u = kg m e = kg m p = kg molar gas constant, R = 8.3 J K mol the vogadro constant, N = mol the oltzmann constant, k = J K gravitational constant, G = N m 2 kg 2 acceleration of free fall, g = 9.8 m s 2 ULES /3/M/J/4

3 3 Formulae 2 uniformly accelerated motion, s = ut + at 2 v 2 = u 2 + 2as work done on/by a gas, W = p V gravitational potential, φ = Gm r hydrostatic pressure, p = ρ gh pressure of an ideal gas, p = Nm <c 2 > 3 V simple harmonic motion, velocity of particle in s.h.m., a = ω 2 x v = v 0 cos ωt x v = ± ω ( x ) electric potential, V = Q 4πε 0 r capacitors in series, / = / + / capacitors in parallel, = energy of charged capacitor, W = QV 2 resistors in series, R = R + R resistors in parallel, / R = / R + / R alternating current/voltage, x = x 0 sin ωt radioactive decay, x = x 0 exp( λt) decay constant, λ = t 2 ULES /3/M/J/4 [Turn over

4 Which quantity can be measured in electronvolts (ev)? 4 electric charge electric potential energy power 2 The unit of specific heat capacity is J kg K. What is its equivalent in terms of SI base units? kg m 2 K m s K m s 2 K m 2 s 2 K 3 What is the vertical component of this displacement vector? 5.0 km 37 horizontal 3.0 km 3.8 km 4.0 km 5.0 km ULES /3/M/J/4

5 5 4 The resistance of a lamp is calculated from the value of the potential difference (p.d.) across it and the value of the current passing through it. Which statement correctly describes how to combine the uncertainties in the p.d. and in the current? dd together the actual uncertainty in the p.d. and the actual uncertainty in the current. dd together the percentage uncertainty in the p.d. and the percentage uncertainty in the current. Subtract the actual uncertainty in the current from the actual uncertainty in the p.d. Subtract the percentage uncertainty in the current from the percentage uncertainty in the p.d. 5 The display on a cathode-ray oscilloscope shows the signal produced by an electronic circuit. The time-base is set at 5.0 ns per division and the Y-gain at 0 V per division. What is the frequency of the signal? Hz Hz Hz Hz ULES /3/M/J/4 [Turn over

6 6 6 digital caliper is used to measure the mm width of a plastic ruler. The digital caliper reads to the nearest 0.0 mm. What is the correct way to record this reading? ± 0.0 m ± 0.00 m (2.850 ± 0.00) 0 2 m (2.850 ± 0.00) 0 3 m 7 n experiment is performed to measure the acceleration of free fall g. body falls between two fixed points. The four measurements shown below are taken. Which measurement is not required for the calculation of g? the distance fallen by the body the initial velocity of the body the mass of the body the time taken for the body to fall 8 In a cathode-ray tube, an electron is accelerated uniformly in a straight line from a speed of m s to m s over a distance of 0 mm. What is the acceleration of the electron? m s m s m s m s 2 ULES /3/M/J/4

7 9 The graph shows how the speed v of a sprinter changes with time t during a 00 m race. 7 v / m s t / s What is the best estimate of the maximum acceleration of the sprinter? 0.5 m s 2 m s 2 3 m s 2 0 m s 2 0 tennis ball is dropped onto a table and bounces back up. The table exerts a force F on the ball. Which graph best shows the variation with time t of the force F while the ball is in contact with the table? F F F F 0 0 t 0 0 t 0 0 t 0 0 t ULES /3/M/J/4 [Turn over

8 resultant force of 0 N acts on a body for a time of 2.0 s. Which graph could show the variation with time t of the momentum p of the body? 8 20 p / kg m s t / s 2 stationary body explodes into two components of masses m and 2m. The components gain kinetic energies X and Y respectively. moves with kinetic energy X m 2m moves with kinetic energy Y What is the value of the ratio Y X? ULES /3/M/J/4

9 3 What is the condition for an object to be in equilibrium? 9 The object s velocity and the resultant torque on it must both be zero. The object s velocity must be zero. The resultant force and the resultant torque on the object must both be zero. The resultant force on the object must be zero. 4 uniform solid cuboid of concrete of dimensions 0.50 m.20 m 0.40 m and weight 4000 N rests on a flat surface with the.20 m edge vertical as shown in diagram m.20 m 0.40 m 0.50 m 0.50 m.20 m diagram diagram 2 What is the minimum energy required to roll the cuboid through 90 to the position shown in diagram 2 with the 0.50 m edge vertical? 200 J 400 J 400 J 2600 J ULES /3/M/J/4 [Turn over

10 0 5 uniform beam is pivoted at P as shown. Weights of 0 N and 20 N are attached to its ends. The length of the beam is marked at 0. m intervals. The weight of the beam is 00 N. t which point should a further weight of 20 N be attached to achieve equilibrium? 0.6 m 0.4 m 0. m 0 N P 20 N 6 n electric motor has an input power P in, useful output power P out and efficiency η. input power P in electric motor of efficiency η output power P out power lost How much power is lost by the motor? ηp in P in ηp out η η P out 7 shot-put champion accelerates a 7.0 kg metal ball in a straight line. The ball moves from rest to a speed of 2 m s in a distance of.2 m. What is the average resultant force on the metal ball? 70 N 20 N 420 N 840 N ULES /3/M/J/4

11 8 ball drops onto a horizontal surface and bounces elastically. What happens to the kinetic energy of the ball during the very short time that it is in contact with the surface? Most of the kinetic energy is lost as heat and sound energy. The kinetic energy decreases to zero and then returns to its original value. The kinetic energy remains constant because it is an elastic collision. The kinetic energy remains constant in magnitude but changes direction. 9 When the water in a pond freezes, it changes from a liquid to a solid. When this occurs, it changes volume and exchanges energy with the surroundings. Which row is correct? change of volume energy exchange contracts gives out energy to the surroundings contracts takes in energy from the surroundings expands gives out energy to the surroundings expands takes in energy from the surroundings 20 Which process does not require energy to be supplied? boiling evaporation freezing melting ULES /3/M/J/4 [Turn over

12 2 2 The graph shows the distribution of speeds for the molecules of a gas at a particular temperature. the number of molecules with speed v 0 0 speed v Which statement is correct? ll the molecules have the same kinetic energy. The commonest value of speed is also the average speed. The graph shows that the molecules of a gas are widely spaced apart. The peak value of the graph would move to the right if the temperature is increased. 22 The Mariana Trench in the Pacific Ocean has a depth of about 0 km. ssuming that sea water is incompressible and has a density of about 020 kg m 3, what would be the approximate pressure at that depth? 0 5 Pa 0 6 Pa 0 7 Pa 0 8 Pa 23 n elastic material with a Young modulus E is subjected to a tensile stress S. Hooke s Law is obeyed. What is the expression for the elastic energy stored per unit volume of the material? 2 S 2E S 2 E E 2S 2 2E S 2 ULES /3/M/J/4

13 3 24 ylindrical samples of steel, glass and rubber are each subjected to a gradually increasing tensile force F. The extensions e are measured and graphs are plotted as shown below. F F F 0 0 graph X e 0 0 graph Y e 0 0 graph Z e Which row correctly relates the graphs to the materials? steel glass rubber X Y Z X Z Y Y X Z Y Z X 25 cathode-ray oscilloscope (c.r.o.) displays a waveform corresponding to a sound wave. In order to determine the frequency of the sound wave, which part of the displayed waveform must be measured and which c.r.o. setting must be known? on-screen measurement c.r.o. setting amplitude time-base amplitude Y-gain wavelength time-base wavelength Y-gain ULES /3/M/J/4 [Turn over

14 4 26 What is the approximate range of frequencies of infra-red radiation? 0 3 Hz to 0 9 Hz 0 9 Hz to 0 Hz 0 Hz to 0 4 Hz 0 4 Hz to 0 7 Hz 27 small source emits spherical waves. source r P The wave intensity I at any point P, a distance r from the source, is inversely proportional to r 2. What is the relationship between the wave amplitude a and the distance r? a 2 r a r a r 2 a 4 r ULES /3/M/J/4

15 28 student attempts to show the interference of light using two identical green LEs. 5 Which statement explains why the experiement will not succeed? The light waves from the sources are not coherent. The light waves from the sources do not have the same amplitude. The light waves from the sources have a range of wavelengths. The light waves from the sources are not monochromatic. 29 stationary wave is set up on a stretched string, as shown. Q S P R Which statement about the points on the string is correct? Point Q vibrates with the largest amplitude. Points P and R vibrate in phase. Point S is an antinode. The horizontal distance between R and S is half the wavelength. 30 Monochromatic light is incident on a diffraction grating and a diffraction pattern is observed. Which line of the table gives the effect of replacing the grating with one that has more lines per metre? number of orders of diffraction visible angle between first and second orders of diffraction decreases decreases decreases increases increases decreases increases increases ULES /3/M/J/4 [Turn over

16 3 n electron enters a region of space where there is a uniform electric field E as shown. 6 path of electron E Initially, the electron is moving parallel to, and in the direction of, the electric field. What is the subsequent path and change of speed of the electron? path of electron speed of electron linear decreases linear increases parabolic decreases parabolic increases ULES /3/M/J/4

17 7 32 Two parallel plates X and Y are separated by a distance d in a vacuum. There is a potential difference between the plates so that a uniform electric field is produced. plate X plate Y q d charge q moves from rest from the surface of plate X and travels towards plate Y. When the charge reaches plate Y it has kinetic energy K. Which expression gives the electric field strength between the plates? q Kd qd K K qd Kd q ULES /3/M/J/4 [Turn over

18 8 33 Two wires P and Q made of the same material and of the same length are connected in parallel to the same voltage supply. Wire P has diameter 2 mm and wire Q has diameter mm. What is the ratio current in P? current in Q cell has an electromotive force (e.m.f.) of 6 V and internal resistance R. n external resistor, also of resistance R, is connected across this cell, as shown. 6 V cell R R Power P is dissipated by the external resistor. The cell is replaced by a different cell that has an e.m.f. of 6 V and negligible internal resistance. What is the new power that is dissipated in the external resistor? 0.5P P 2P 4P ULES /3/M/J/4

19 35 The diagram shows a low-voltage circuit for heating the water in a fish tank. 9 power supply heater The heater has a resistance of 3.0 Ω. The power supply has an e.m.f. of 2 V and an internal resistance of.0 Ω. t which rate is energy supplied to the heater? 27 W 36 W 48 W 64 W ULES /3/M/J/4 [Turn over

20 20 36 The diagrams show the same cell, ammeter, potentiometer and fixed resistor connected in different ways. W X d d Y Z d d The distance d between the sliding contact and a particular end of the potentiometer is varied. The current measured is then plotted against the distance d. For which two circuits will the graphs be identical? W and X W and Y X and Y Y and Z ULES /3/M/J/4

21 2 37 What is the current in the 40 Ω resistor of the circuit shown? 20 Ω 20 Ω 40 Ω 20 Ω 20 Ω 0 V zero battery of negligible internal resistance is connected to a resistor network, an ammeter and a switch S, as shown. 4.8 Ω 7.2 Ω S 2.8 Ω When S is open, the reading on the ammeter is 250 m. When S is closed, what is the change in the reading on the ammeter? m 440 m ULES /3/M/J/4 [Turn over

22 22 39 n isotope of thorium has a nucleon number of 232 and a proton number of 90. It decays to form another isotope of thorium with a nucleon number of 228. How many alpha particles and beta particles are emitted by a nucleus of thorium during this decay? alpha particles beta particles Four nuclei are represented below E 5 G M 3 Q Which statement about these nuclei is correct? n uncharged atom of element Q has 24 orbital electrons. Nucleus M could transform into Q by emitting a beta particle. Nuclei G and M are isotopes of the same element. When E absorbs a neutron and then emits an alpha particle, nucleus E transforms into M. ULES /3/M/J/4

23 23 LNK PGE ULES /3/M/J/4

24 24 LNK PGE Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (ULES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity. ambridge International Examinations is part of the ambridge ssessment Group. ambridge ssessment is the brand name of University of ambridge Local Examinations Syndicate (ULES), which is itself a department of the University of ambridge. ULES /3/M/J/4

UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level

UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level *488539327* UNIVERSITY OF MRIGE INTERNTIONL EXMINTIONS General ertificate of Education dvanced Subsidiary Level and dvanced Level PHYSIS 972/ Paper Multiple hoice October/November 28 dditional Materials: