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

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1 * * UNIVERSITY OF MRIGE INTERNTIONL EXMINTIONS General ertificate of Education dvanced Subsidiary Level and dvanced Level PHYSIS 9702/11 Paper 1 Multiple hoice October/November 2012 dditional Materials: Multiple hoice nswer Sheet Soft clean eraser Soft pencil (type or H is recommended) 1 hour RE THESE INSTRUTIONS FIRST 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,, 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 26 printed pages and 2 blank pages. I12 11_9702_11/9RP ULES 2012 [Turn over

2 2 ata speed of light in free space, c = m s 1 permeability of free space, µ 0 = 4π 10 7 H m 1 permittivity of free space, ε 0 = F m 1 1 ( = m F 1 ) 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 = 8.31 J K 1 mol 1 the vogadro constant, N = mol 1 the oltzmann constant, k = J K 1 gravitational constant, G = N m 2 kg 2 acceleration of free fall, g = 9.81 m s 2

3 3 Formulae 2 uniformly accelerated motion, s = ut + 1 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 = 1 Nm <c 2 > 3 V simple harmonic motion, velocity of particle in s.h.m., a = ω 2 x v = v 0 cos ωt v = ± ω x x electric potential, V = Q 4πε 0 r capacitors in series, 1 / = 1 / / capacitors in parallel, = energy of charged capacitor, 1 W = QV 2 resistors in series, R = R 1 + R resistors in parallel, 1 / R = 1 / R / R alternating current/voltage, x = x 0 sin ωt radioactive decay, x = x 0 exp( λt) decay constant, λ = t 1 2 [Turn over

4 1 What is the unit of weight in terms of SI base unit(s)? kg m s 1 kg m s 2 N J m Vectors P and Q are drawn to scale. P Q Which diagram represents the vector (P Q)? 3 What is the approximate temperature of a red-hot ring on an electric cooker?

5 5 4 Which list contains only scalar quantities? area, length, displacement kinetic energy, speed, power potential energy, momentum, time velocity, distance, temperature 5 The density of the material of a coil of thin wire is to be found. Which set of instruments could be used to do this most accurately? metre rule, protractor, spring balance micrometer, metre rule, top-pan balance stopwatch, newton-meter, vernier calipers tape measure, vernier calipers, lever balance [Turn over

6 6 quantity X varies with temperature θ as shown. 6 X θ θ is determined from the corresponding values of X by using this graph. X is measured with a percentage uncertainty of ±1 % of its value at all temperatures. Which statement about the uncertainty in θ is correct? The percentage uncertainty in θ is least near 0. The percentage uncertainty in θ is least near 100. The actual uncertainty in θ is least near 0. The actual uncertainty in θ is least near The measurement of a physical quantity may be subject to random errors and to systematic errors. Which statement is correct? Random errors can be reduced by taking the average of several measurements. Random errors are always caused by the person taking the measurement. systematic error cannot be reduced by adjusting the apparatus. systematic error results in a different reading each time the measurement is taken.

7 8 The velocity of an electric car changes as shown. velocity / km h time / s What is the acceleration of the car? 190 m s 2 53 m s 2 26 m s m s 2 9 ball is thrown vertically in air. Neglecting air resistance, which property of the ball can never be zero at any time during the flight? acceleration kinetic energy speed velocity [Turn over

8 10 golf ball is hit with the same force and direction on the Earth and on the Moon. Which diagram best represents the shapes of the paths taken by the golf ball? 8 Moon Moon Earth Earth Moon Moon Earth Earth

9 11 n object travelling with velocity v strikes a wall and rebounds as shown. 9 v v Which property of the object is not conserved? kinetic energy mass momentum speed [Turn over

10 10 12 particle X has speed v and collides with a stationary identical particle Y. The collision is perfectly elastic. v X Y What are the speed and direction of motion of each of the two particles after the collision? X Y stationary v to the right v to the right v to the right 2 2 v to the left v to the right 2 2 v to the left stationary

11 11 13 mass of 2.0 kg rests on a frictionless surface. It is attached to a 1.0 kg mass by a light, thin string which passes over a frictionless pulley. The 1.0 kg mass is released and it accelerates downwards. mass 2.0 kg pulley 1.0 kg 0.50 m What is the speed of the 2.0 kg mass as the 1.0 kg mass hits the floor, having fallen a distance of 0.50 m? 1.8 m s m s m s m s 1 [Turn over

12 12 14 lead pellet is shot vertically upwards into a clay block that is stationary at the moment of impact but is able to rise freely after impact. stationary clay block mass 95 g impact velocity 200 m s 1 lead pellet mass 5.0 g The pellet hits the block with an initial velocity of 200 m s 1. It embeds itself in the block and does not emerge. How high above its initial position will the block rise? (Mass of pellet = 5.0 g; mass of clay block = 95 g.) 5.1 m 5.6 m 10 m 2000 m

13 13 15 The diagram shows an experiment to measure the force exerted on a ball by a horizontal air flow. 30 air flow The ball is suspended by a light string and weighs 0.15 N. The deflection of the string from vertical is 30. What is the force on the ball from the air flow? N N 0.26 N 0.30 N 16 student balances a 30 cm ruler on a fulcrum set at the 15 cm mark. She then places a 50 g mass on the 23 cm mark and a 20 g mass on the 11 cm mark, as shown. 20 g 50 g Which mass should she place on the 7 cm mark to restore the balance? 30 g 40 g 47 g 133 g [Turn over

14 14 17 sledge slides down a slope at a constant velocity. The three forces that act on the sledge are the normal contact force, the weight W and a constant frictional force F. Which diagram represents these forces acting on the sledge? F F W W W W F F 18 The kinetic energy of a particle is increased by a factor of 4. y what factor does its speed increase? piston in a gas supply pump has an area of 600 cm 2 and it moves a distance of 40 cm during one stroke. The pump moves the gas against a fixed pressure of 5000 Pa. How much work is done by the piston during one stroke? J J J J

15 15 20 railway engine accelerates a train of total mass 800 tonnes (1 tonne = 1000 kg) from rest to a speed of 50 m s 1. How much work must be done on the train to reach this speed? J J J J 21 Water from a reservoir is fed to the turbine of a hydroelectric system at a rate of 500 kg s 1. The reservoir is 300 m above the level of the turbine. The electrical output from the generator driven by the turbine is 200 at a potential difference of 6000 V. What is the efficiency of the system? 8.0 % 8.2 % 80 % 82 % 22 Which row correctly describes the spacing, ordering and motion of the molecules in water and in ice when both are at a temperature of 0? spacing ordering motion molecules in ice are closer together than molecules in water molecules in ice are closer together than molecules in water molecules in ice are further apart than molecules in water molecules in ice are further apart than molecules in water a regular pattern of molecules in both ice and water a regular pattern of molecules in ice but not in water a regular pattern of molecules in both ice and water a regular pattern of molecules in ice but not in water molecules in both ice and water have the same average speed molecules in ice travel more slowly than those in water molecules in ice travel more slowly than those in water molecules in both ice and water have the same average speed [Turn over

16 16 23 Three springs are arranged vertically as shown. P Q R W Springs P and Q are identical and have spring constant k. Spring R has spring constant 3k. What is the increase in the overall length of the arrangement when a force W is applied as shown? 5 W 6 k 4 W 3 k 7 kw 4 kw 2

17 17 24 The diagram shows the stress-strain graph for two wires X and Y of different materials up to their breaking points. oth wires have the same initial dimensions. stress X Y 0 0 strain Which statement is not correct? Material X extends elastically. Material X extends more than material Y when loaded with the same force. Material X has a larger ultimate tensile stress. Material X is brittle. 25 steel wire and a brass wire are joined end to end and are hung vertically with the steel wire attached to a point on the ceiling. The steel wire is twice as long as the brass wire and has half the diameter. large mass is hung from the end of the brass wire so that both wires are stretched elastically. The Young modulus for steel is Pa and for brass is Pa. What is the ratio of the extension of the steel to the extension of the brass? [Turn over

18 26 The diagram shows a graph of displacement against time for a sound wave. 18 displacement 0 0 time The intensity of the sound is halved. Which graph shows the displacement of this sound wave? displacement displacement 0 0 time 0 0 time displacement displacement 0 0 time 0 0 time

19 19 27 What do not travel at the speed of light in a vacuum? electrons microwaves radio waves X-rays 28 musical organ produces notes by blowing air into a set of pipes that are open at one end and closed at the other. What is the lowest frequency of sound produced by a pipe of length 10 m? (The speed of sound in the pipe is 320 m s 1.) 4 Hz 8 Hz 16 Hz 32 Hz 29 Monochromatic light is directed at a diffraction grating as shown. Which diagram shows all the possible directions of the light, after passing through the grating, that give maximum intensity? [Turn over

20 20 30 n electron is initially at rest in a uniform electric field. Which graph shows the variation with time of the velocity of the electron? velocity velocity 0 0 time 0 0 time velocity velocity 0 0 time 0 0 time

21 21 31 charged particle is in the electric field between two horizontal metal plates connected to a source of constant potential difference, as shown. charged particle There is a force F on the particle due to the electric field. The separation of the plates is doubled. What will be the new force on the particle? F 4 F 2 F 2F 32 The potential difference between point X and point Y in a circuit is 20 V. The time taken for charge carriers to move from X to Y is 15 s. In this time, the energy of the charge carriers changes by 12 J. What is the current between X and Y? [Turn over

22 33 cylindrical wire of length 10 m and diameter 2.0 mm has a resistance of Ω. From which material is the wire made? 22 material resistivity / Ω m bronze nichrome silver zinc The I-V characteristics of two electrical components P and Q are shown below. I / P Q V / V Which statement is correct? P is a resistor and Q is a filament lamp. The resistance of Q increases as the current in it increases. For a current of 1.9, the resistance of Q is approximately half that of P. For a current of 0.5, the power dissipated in Q is double that in P.

23 23 35 In a fire alarm system, a thermistor T has a resistance of 2000 Ω at room temperature. Its resistance decreases as the temperature increases. The alarm is triggered when the potential difference between X and Y reaches 4.5 V. 12 V T 150 Ω X Y What is the resistance of the thermistor when the alarm is triggered? 90 Ω 150 Ω 250 Ω 1300 Ω 36 network of electrical components is connected across a battery of negligible internal resistance, as shown. V The resistance of the variable resistor is increased. What is the effect on the readings of the ammeter and voltmeter? ammeter voltmeter decreases increases increases decreases unchanged decreases unchanged increases [Turn over

24 24 37 The diagram shows a potentiometer circuit. E 1 R X T Y E 2 The contact T is placed on the wire and moved along the wire until the galvanometer reading is zero. The length XT is then noted. In order to calculate the potential difference per unit length of the wire XY, which value must also be known? the e.m.f. of the cell E 1 the e.m.f. of the cell E 2 the resistance of resistor R the resistance of the wire XY

25 25 38 class of students used dice to simulate radioactive decay. fter each throw, those dice showing a 6 were removed. The graph shows the results. 100 number of dice remaining number of throws of the dice What could the scatter of points about the best-fit curve represent for actual radioactive decay? background count not being taken into account more than one type of radiation being present the random nature of radioactive decay the spontaneous nature of radioactive decay [Turn over

26 39 Which statement about alpha, beta and gamma radiation is correct? 26 lpha radiation has the greatest ionising power. eta radiation has the greatest ionising power. Gamma radiation has the greatest ionising power. lpha, beta and gamma radiation have nearly equal ionising powers. 40 In a radioactive decay series, three successive decays each result in a particle being emitted. The first decay results in the emission of a β-particle. The second decay results in the emission of an α-particle. The third decay results in the emission of another β-particle. β α β P Q R S Nuclides P and S are compared. Which statement is correct? P and S are identical in all respects. P and S are isotopes of the same element. S is a different element of lower atomic number. S is a different element of reduced mass.

27 27 LNK PGE

28 28 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. 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.

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: