UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS Cambridge International Level 3 Pre-U Certificate Principal Subject

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1 UNIVERSITY OF MBRIGE INTERNTIONL EXMINTIONS ambridge International Level 3 Pre-U ertificate Principal Subject PHYSIS 979/1 Paper 1 Part Multiple hoice May/June 1 1 hour 15 minutes * * dditional Materials: RE THESE INSTRUTIONS FIRST Multiple hoice nswer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) Write in soft pencil. o not use staples, paper clips, highlighters, 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. There are forty questions on this paper. nswer all questions. For each question there are four possible answers, B, 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 This document consists of 7 printed pages and 1 blank page. IB1 6_979_1/4RP ULES 1 [Turn over

2 ata gravitational field strength close to Earth s surface g = 9.81 N kg 1 elementary charge e = speed of light in vacuum c = m s 1 Planck constant permittivity of free space h = J s ε = F m 1 gravitational constant G = N m kg electron mass proton mass unified atomic mass constant m e = kg m p = kg u = kg molar gas constant R = 8.31 J K 1 mol 1 vogadro constant N = mol 1 Boltzmann constant k = J K 1 Stefan-Boltzmann constant σ = W m K 4 ULES 1 979/1/M/J/1

3 3 Formulae uniformly accelerated motion s = ut + 1 at magnetic force F = BIl sin θ v = u + as F = BQv sin θ u + v s = t electromagnetic induction E = heating E = mc θ Hall effect V = Bvd d( NΦ) dt change of state E = ml time dilation t = t v 1 c refraction n = n = sinθ sinθ v v 1 1 kinetic theory work done on/by a gas photon energy E = hf radioactive decay de Broglie wavelength λ = h p 1 m<c 3 > = kt W = p V dn dt = λn N = N e λ t simple harmonic motion x = cos ωt t In 1 = λ energy stored in a capacitor v = ω sin ωt attenuation losses I = I e µx a = ω cos ωt mass-energy equivalence E = c m F = mω x E = 1 hydrogen energy levels E n = ev m ω n W = Q1Q electric force F = 4πε r electrostatic potential energy W = 1 QV Heisenberg uncertainty principle Q1Q 4πε r Gm1m gravitational force F = r gravitational potential energy E = Gm 1 m r Wien s law p x ğ E t ğ h π h π 1 λ max T Stefan s law L = 4πσr T 4 electromagnetic radiation from a moving source λ λ f f v c ULES 1 979/1/M/J/1 [Turn over

4 4 1 space probe is leaving a large asteroid. uring the initial part of its journey, the weight of the probe in the asteroid s gravitational field does not change. Which diagram shows the gravitational field line pattern close to the surface of the asteroid? B swimmer dives off a diving board into a pool. Which quantity will not affect the time she spends in the air before hitting the water? B acceleration due to gravity air resistance her horizontal velocity on leaving the board the height of the board ULES 1 979/1/M/J/1

5 5 3 student is studying Newton s third law of motion. He states that a rocket travelling in deep space can never accelerate because when the rocket s engines burn, the forwards force acting on the rocket is cancelled by an equal and opposite force. Which statement explains why the student is wrong? B The equal and opposite force does not act on the rocket. The equal and opposite force has a different line of action. The equal and opposite force is a reaction force. The equal and opposite force will be a different type of force. 4 Two masses are connected by a weightless cord passing over a frictionless pulley and released. 3 kg 5 kg The acceleration due to gravity is g. What is the magnitude of the acceleration of the masses? g 4 B 3g 8 5g 8 g ULES 1 979/1/M/J/1 [Turn over

6 6 5 water cannon directs a jet of water towards a vertical wall. 3 kg of water hit the wall each minute. The water hits the wall horizontally with a velocity m s 1. ssume the water falls vertically after hitting the wall. What force does the water exert on the wall? 1 N B N 3 N 6 N 6 force F is applied at an angle θ to a door, at a distance d from the hinge. F hinge door θ d What is the moment of F about the hinge? Fd sinθ B Fd sinθ Fd cosθ Fd cosθ ULES 1 979/1/M/J/1

7 7 7 The graph shows how the horizontal displacement of a fairground car changes with time for part of its journey. displacement X Y simple accelerometer is made by sandwiching a rubber ring between two glass plates and introducing some coloured water inside the ring. The accelerometer is attached to the side of the car. iagram B corresponds to point X on the graph. time Which diagram shows the angle of water surface in the accelerometer at point Y? glass plates B rubber ring water ULES 1 979/1/M/J/1 [Turn over

8 8 rock climber descends a cliff face by abseiling down it. 8 T 35 horizontal force from cliff face weight of climber The mass of the climber is 64 kg. t a time the climber pauses, the rope under tension is held at an angle of 35 to the vertical. What is the magnitude of the horizontal force acting on the climber from the cliff face? 3 N B 36 N 44 N 51 N 9 particle moves with constant speed in a circle of radius r under the action of a constant force of magnitude F. What is the work done by the force in one complete revolution of the particle? Fr B πfr Fr π zero ULES 1 979/1/M/J/1

9 9 1 dam is to be built across the ongo River in frica. The water will fall through 15 m providing energy to operate a power station. The rate at which the water falls is 6 4 m 3 s 1. What is the power delivered to the power station? Take the density of water as 1 kg m MW B 59 MW 396 MW 39 MW 11 Water is pumped through a car engine in order to keep it at a constant temperature. The pump stops working, and the engine transfers energy to the water in the engine block at a rate of 1 kw. The volume of water in the engine block is m 3. t what rate does the temperature of the water rise? Water has a specific heat capacity of 4 J kg 1 K 1 and a density of 1 kg m 3..4 K s 1 B.5 K s 1 4. K s 1 4 K s 1 1 Before the invention of the modern refrigerator, ice was manufactured industrially and delivered to households. One method used ammonia. 75 % of the energy required for the ammonia to evaporate came from liquid water at, turning the water into ice. If kg of ice was produced in six hours, at what rate did the ammonia need to be evaporated? The specific latent heat of fusion of water is 33 kj kg 1. The specific latent heat of vaporisation of ammonia is 137 kj kg kg s 1 B 1. kg s 1 1. kg s 1. kg s 1 ULES 1 979/1/M/J/1 [Turn over

10 1 13 ball is released from rest. It falls vertically, hits the ground and bounces back up. Energy losses are negligible. ground Which graph shows how the gravitational potential energy of the ball changes during the bounce? B gravitational potential energy gravitational potential energy time time gravitational potential energy gravitational potential energy time time ULES 1 979/1/M/J/1

11 11 14 force-extension graph for a sample of metal wire is shown. force X Y Z extension Which row correctly identifies points X, Y and Z? point X point Y point Z elastic limit proportional limit breaking stress B elastic limit proportional limit yield point proportional limit elastic limit breaking stress proportional limit elastic limit yield point 15 guitarist fits two new strings of the same length and material to his guitar. They are tightened to the same tension. One string has four times the radius of the other. What is the ratio stress in the thicker string? stress in the thinner string.65 B ULES 1 979/1/M/J/1 [Turn over

12 1 16 load of weight of 4. N is attached to the end of an unstretched spring. The load is lowered slowly by hand until it is in equilibrium. The hand is then removed and the load does not oscillate. The graph shows how the forces exerted by the load vary as it is lowered. force / N 4. force on spring force on hand.. How much energy is stored in the spring?.1 distance / m. J B.1 J. J.4 J ULES 1 979/1/M/J/1

13 13 17 n apple is released from rest and falls freely under gravity. Which graph shows how the kinetic energy (k.e.) of the apple varies with its gravitational potential energy (g.p.e.)? B k.e. k.e. g.p.e. g.p.e. k.e. k.e. g.p.e. g.p.e. ULES 1 979/1/M/J/1 [Turn over

14 14 18 metal wire of length L and uniform cross-sectional area has a resistance of 1 Ω. The wire is stretched and L increases by 5 %. The volume of the wire remains constant. What is the resistance of the stretched wire? 95 Ω B 1 Ω 15 Ω 11 Ω 19 circuit is connected as shown. battery R When 1 flows around the circuit, 1 J of electrical energy is dissipated in resistor R and J in the battery s internal resistance. What is the e.m.f. of the battery?.6 V B.7 V 1. V 1.4 V ULES 1 979/1/M/J/1

15 15 Four identical resistors are connected in a circuit as shown. X The voltmeter reads 6. V.The battery has negligible internal resistance. V What are the correct values for the potential difference across resistor X and the e.m.f. of the battery? potential difference across X / V e.m.f. of battery / V. 6. B ULES 1 979/1/M/J/1 [Turn over

16 16 1 The diagram shows how the potential difference (p.d.) across a battery varies with the current that is supplied. V / V I / What is the internal resistance of the battery?.6 Ω B 1. Ω 1.7 Ω.3 Ω ULES 1 979/1/M/J/1

17 17 Two resistors, each of resistance 1 kω, are connected in series with a 6. V battery of negligible internal resistance. 1 kω 6. V 1 kω V 1 kω voltmeter of resistance 1 kω is connected across one of the resistors. What is the reading on the voltmeter? V B. V 3. V 4. V ULES 1 979/1/M/J/1 [Turn over

18 18 3 The resistance of a light-dependent resistor (LR) is 5 MΩ in the dark and 1 kω when light shines on it. The LR is connected in series with a 6 V battery with negligible internal resistance and a 5 kω resistor. The circuit is placed in a dark room and the LR is then illuminated by a flashing lamp. Which diagram shows how the p.d. across the 5 kω resistor varies with time? 6 p.d. / V 4 6 p.d. / V 4 B time / s time / s 6 p.d. / V 4 6 p.d. / V 4 time / s time / s ULES 1 979/1/M/J/1

19 4 wave has a frequency of 5 Hz. It travels through a medium at a speed of 8 km s 1. What is the phase difference, in radians, between two points km apart? 19 B π 4 π π 5 Two radio telescopes separated by a distance d detect parallel waves of wavelength λ from the same distant radio source. θ d What is the correct expression for the path difference between the waves received at the telescopes? d sin θ B d cos θ d sinθ λ d cos θ λ ULES 1 979/1/M/J/1 [Turn over

20 6 The Rayleigh criterion for resolving power is θ λ / b. Two sources of radio waves are at a distance of m from Earth. The sources are separated by m and emit radio waves of wavelength.3 m. What is the estimate for the diameter of a dish of a radio telescope on Earth that will just resolve the two sources? B 3 x 1 5 m.3 m 3 m 3 x 1 4 m 7 strip of wet cardboard is fixed on the bottom of a microwave oven. The microwave oven is turned on for a short time. When the card is removed a pattern of dry spots is observed on the cardboard. This is because a standing wave is set up inside the oven. The dry spots are measured and found to occur at 14 mm, 86 mm, 156 mm, 5 mm and 93 mm from the end of the strip. From this information, what is the frequency of the microwaves?. GHz B.6 GHz 4.3 GHz 5.1 GHz 8 Laser light is incident upon a double slit and the resulting interference pattern is viewed on a distant screen. very thin transparent film is then placed in front of one of the slits, such that the light emerging from this slit is now 18 out of phase with the light emerging from the other slit. What change, if any, will there be in the interference pattern observed on the screen? B The interference pattern will be much dimmer. The interference pattern will shift slightly. There will be no change. There will be no interference pattern as there is no longer coherence. ULES 1 979/1/M/J/1

21 1 9 The diagram shows a square-wave pulse at time t=. The pulse is travelling to the right at a speed of 4. ms 1. displacement / cm X distance / m 1. Which graph correctly shows how the displacement of point X will vary over the next 4 seconds? displacement / cm +1. displacement / cm +1. B time / s time / s displacement / cm +1. displacement / cm time / s time / s ULES 1 979/1/M/J/1 [Turn over

22 3 lamp is viewed through two polarising filters, X and Y. light from lamp eye X Y The filters are initially orientated so that the lamp appears with maximum brightness. Which change in the orientation of the filters will again make the lamp appear with maximum brightness? X Y not turned turned 9 anticlockwise B turned 45 clockwise turned 45 anticlockwise turned 45 clockwise turned 9 anticlockwise turned 9 clockwise turned 9 anticlockwise ULES 1 979/1/M/J/1

23 31 The diagram shows a ray of light passing from air into a glass block. 3 air glass 4 6 The angle between the ray and the edge of the glass block is 4 in the air and 6 in the glass. What is the speed of light in the glass block?. 1 8 m s 1 B. 1 8 m s m s m s 1 ULES 1 979/1/M/J/1 [Turn over

24 4 3 The graph shows how the amplitude varies with time for two sound waves, X and Y. 5 amplitude / mm X Y time / ms Which row shows the intensity and frequency ratios for X and Y? intensity of X intensity of Y frequency of X frequency of Y 1 B Light from distant stars passes through the Earth s atmosphere before it reaches an observer on the surface of the Earth. Which statement is correct? B Refraction causes the apparent star positions to move around the pole star. Refraction causes the stars to appear closer to the horizon than they actually are. Refraction causes the stars to appear higher in the sky than they actually are. Refraction does not affect the apparent positions of stars in the sky. ULES 1 979/1/M/J/1

25 5 34 laser used as a screen pointer emits light of wavelength λ. What is its power if it emits n photons per second? B nλ hc hc nλ λ nhc nhc λ 35 In a demonstration of the photoelectric effect, it is found that a stopping potential of 1.7 V is required for the photoelectric current to be reduced to zero. The light used in the demonstration has a frequency of Hz. What is the work function of the metal?.79 ev B.8 ev.49 ev 4.19 ev ULES 1 979/1/M/J/1 [Turn over

26 6 36 When a sample of sodium is illuminated with yellow light electrons are ejected from the surface by the photoelectric effect. Which row describes what happens when the yellow light source is replaced by a blue light source of the same intensity? number of electrons emitted per second maximum kinetic energy of the electrons decreases decreases B decreases increases stays the same decreases stays the same increases 37 In an experiment to learn more about the structure of the atom, Geiger and Marsden fired α-particles at a thin sheet of gold foil. They found that most of the α-particles passed through the gold foil with no significant deviation, although a very tiny minority were deflected through large angles, and some were even back-scattered (deflected by more than 9 ). If the experiment is repeated with a foil of a heavier isotope of gold, how would the results be different? B greater proportion of the α-particles would deflected through a large angle. greater proportion of the α-particles would pass through with no significant deviation. greater proportion of the α-particles would be back-scattered. There would be no significant change. ULES 1 979/1/M/J/1

27 nucleus of radium-6, 88 Ra, decays by emitting an α-particle. What is a product of this decay? 4 Po 84 B 86 Rn 88 Ra 89 c In a thermal reactor, induced fission occurs when a uranium-35 nucleus absorbs a neutron, splits and produces energy and more neutrons. Which statement is correct? B ontrol rods are used to slow down the neutrons. Slow neutrons are more likely to be absorbed by a uranium-35 nucleus than fast ones. The moderator is used to moderate the power output. To sustain the nuclear reaction a large number of neutrons is required per fission. 4 radioactive source consists of a mixture of two isotopes P and Q. P has a half-life of 6 minutes and Q has a half-life of 3 minutes. The initial activity recorded by a suitable counter is 8 min 1. fter 1 minutes the counter registers an activity of 8 min 1. What was the initial contribution of P to the count rate? 16 min 1 B 4 min 1 7 min 1 48 min 1 ULES 1 979/1/M/J/1

28 8 BLNK 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. University of 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 1 979/1/M/J/1

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 *1945541248* UNIVERSITY OF MRIGE INTERNTIONL EXMINTIONS General ertificate of Education dvanced Subsidiary Level and dvanced Level PHYSIS 972/1 Paper 1 Multiple hoice October/November 27 dditional Materials: