*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: Multiple hoice nswer Sheet Soft lean 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 rough working should be done in this booklet. This document consists of 18 printed pages and 2 blank pages. I7 11_972_1/3RP ULES 27 [Turn over
2 ata speed of light in free space, c = 3. 1 8 m s 1 permeability of free space, µ = 4π 1 7 H m 1 permittivity of free space, ε = 8.85 1 12 F m 1 elementary charge, the Planck constant, unified atomic mass constant, rest mass of electron, rest mass of proton, e = 1.6 1 19 h = 6.63 1 34 J s u = 1.66 1 27 kg m e = 9.11 1 31 kg m p = 1.67 1 27 kg molar gas constant, R = 8.31 J K 1 mol 1 the vogadro constant, N = 6.2 1 23 mol 1 the oltzmann constant, k = 1.38 1 23 J K 1 gravitational constant, G = 6.67 1 11 N m 2 kg 2 acceleration of free fall, g = 9.81 m s 2 ULES 27 972/1/O/N/7
3 Formulae uniformly accelerated motion, s = ut + 21 at 2 v 2 = u 2 + 2as work done on/by a gas, W = p V gravitational potential, φ = Gm r hydrostatic pressure, p = ρgh pressure of an ideal gas, p = 1 Nm <c 2 > 3 V simple harmonic motion, a = ω 2 x velocity of particle in s.h.m., v = v cos ωt 2 v = ± ω ( x x 2 ) electric potential, V = Q 4πε r capacitors in series, 1 / = 1 / 1 + 1 / 2 +... capacitors in parallel, = 1 + 2 +... energy of charged capacitor, W = 21 QV resistors in series, R = R 1 + R 2 +... resistors in parallel, 1 / R = 1 / R 1 + 1 / R 2 +... alternating current/voltage, x = x sin ωt radioactive decay, x = x exp( λt) decay constant, λ =.693 t 1 2 ULES 27 972/1/O/N/7 [Turn over
1 The equation relating pressure and density is p = ρgh. How can both sides of this equation be written in terms of base units? 4 [N m 1 ] = [kg m 3 ] [m s 1 ] [m] [N m 2 ] = [kg m 3 ] [m s 2 ] [m] [kg m 1 s 2 ] = [kg m 3 ] [m s 2 ] [m] [kg m 1 s 1 ] = [kg m 1 ] [m s 2 ] [m] 2 What is a reasonable estimate of the diameter of an alpha particle? 1 15 m 1 12 m 1 9 m 1 6 m 3 The diagram shows two vectors X and Y. X Y In which vector triangle does the vector Z show the magnitude and direction of vector X Y? Y Y Z X Z X X X Y Z Y Z ULES 27 972/1/O/N/7
5 4 series of measurements of the acceleration of free fall g is shown in the table. Which set of results is precise but not accurate? g / m s 2 9.81 9.79 9.84 9.83 9.79 9.81 1.12 9.89 8.94 9.42 9.45 9.21 8.99 8.76 8.51 8.45 8.46 8.5 8.41 8.47 5 mass m has acceleration a. It moves through a distance s in time t. The power used in accelerating the mass is equal to the product of force and velocity. The percentage uncertainties are.1 % in m, 1 % in a, 1.5 % in s,.5 % in t. What is the percentage uncertainty in the average power? 2.1 % 2.6 % 3.1 % 4.1 % ULES 27 972/1/O/N/7 [Turn over
6 6 The diagram shows the graduations of a correctly calibrated ammeter. When the current is zero, the pointer is at. 1 2 3 4 5 The ammeter is accidentally readjusted so that when the current is zero, the pointer is at X. X 1 2 3 4 5 Which calibration graph best represents the response of the readjusted ammeter? angle of deflection of pointer from the zero mark angle of deflection of pointer from the zero mark current current angle of deflection of pointer from the zero mark angle of deflection of pointer from the zero mark current current ULES 27 972/1/O/N/7
7 The symbol represents the acceleration of free fall. Which of these statements is correct? 7 is gravity. is reduced by air resistance. is the ratio weight / mass. is the weight of an object. 8 particle moves along a straight line. particular property of the particle's motion is plotted against time. time t any time, the slope of the graph is the acceleration of the particle. What is the property? the displacement of the particle the distance travelled by the particle the speed of the particle the velocity of the particle ULES 27 972/1/O/N/7 [Turn over
8 9 stone is thrown vertically upwards. student plots the variation with time of its velocity. 4 velocity / m s 1 3 2 1 1 2 3 4 1 2 3 4 5 time / s 6 What is the vertical displacement of the stone from its starting point after 5 seconds? 2 m 25 m 45 m 65 m 1 block of mass.6 kg is on a rough horizontal surface. force of 12 N is applied to the block and it accelerates at 4. m s. 4. m s 2 block 12 N What is the magnitude of the frictional force acting on the block? 2.4N 5.3 N 6.7 N 9.6 N ULES 27 972/1/O/N/7
11 car with front-wheel drive accelerates in the direction shown. 9 Which diagram best shows the direction of the total force exerted by the road on the front wheels? 12 The graph shows how a certain quantity varies with another quantity for a parachutist falling at terminal speed. What are the quantities graph? and, and what is represented by the magnitude of the gradient of the quantity quantity magnitude of gradient height time terminal speed momentum time weight of parachutist height potential energy mass of parachutist velocity time acceleration of free fall ULES 27 972/1/O/N/7 [Turn over
1 13 Which two vector diagrams represent forces in equilibrium? P Q R S P and Q Q and R R and S S and P 14 The diagram shows a plan view of a door which requires a moment of 12 N m to open it. door wall wall hinge.8 m What is the minimum force that must be applied at the door s midpoint to ensure it opens? 4.8 N 9.6 N 15 N 3 N 15 car of mass 1 kg first travels forwards at 25 m s and then backwards at 5 m s. What is the change in the kinetic energy of the car? 2 kj 3 kj 325 kj 45 kj ULES 27 972/1/O/N/7
11 16 When bungee jumping, a student starts with maximum gravitational potential energy (position 1), then falls freely until the rope fully unwinds (position 2), after which the rope starts to stretch until the lowest point of the jump is reached (position 3). position 1 position 2 What are the kinetic and elastic potential energies at position 3? position 3 kinetic energy elastic potential energy maximum maximum maximum minimum minimum maximum minimum minimum 17 Two solid substances P and Q have atoms of mass and respectively. There are and atoms per unit volume respectively. It is found by experiment that the density of P is greater than that of Q. Which deduction from this experiment must be correct? > > > > ULES 27 972/1/O/N/7 [Turn over
12 18 submarine carries a pressure meter so that the crew can work out how far they are below the surface of the sea. t the surface, the meter indicates a pressure of 1 kpa. The density of seawater is 13 kg m. What is the depth below the surface when the meter reads 45 kpa? 34.6 m 44.5 m 34 m 437 m 19 What is plastic deformation? Plastic deformation occurs when strain is not proportional to stress but when the load is removed the material returns to its original length. Plastic deformation occurs if, when the load is removed, the material contracts but a permanent stretching has occurred. Plastic deformation occurs until the extension is no longer proportional to the load. Plastic deformation occurs when the material extends so that strain is directly proportional to stress. 2 The graph shows how the length of a particular rubber cord varies as force is applied..4 length / m.2 force / N 25 What is the maximum strain energy in this deformed rubber cord? 2.5 J 5. J 7.5 J 1 J 21 What is the relationship between the intensity and the amplitude of a wave? = constant = constant = constant = constant ULES 27 972/1/O/N/7
13 22 n electromagnetic wave has a frequency of 1 Hz. In which region of the electromagnetic spectrum does the wave occur? infra-red radio ultraviolet visible 23 The graph represents a sinusoidal wave in the sea, travelling at a speed of 8. m s, at one instant of time. The maximum speed of the oscillating particles in the wave is 2, where is the amplitude and is the frequency. displacement / m 2 P 5 1 position / m 2 n object P of mass 2. 1 kg floats on the surface. What is the maximum kinetic energy of P due to the wave? ssume that its motion is vertical..26 mj 4. mj 39 mj 64 mj 24 Monochromatic light illuminates two narrow parallel slits. The interference pattern which results is observed on a screen some distance beyond the slits. Which change increases the separation between the dark lines of the interference pattern? decreasing the distance between the screen and the slits increasing the distance between the slits using monochromatic light of higher frequency using monochromatic light of longer wavelength 25 narrow beam of monochromatic light is incident normally on a diffraction grating. Third-order diffracted beams are formed at angles of 45 to the original direction. What is the highest order of diffracted beam produced by this grating? 3rd 4th 5th 6th ULES 27 972/1/O/N/7 [Turn over
26 n electron is situated in a uniform electric field as shown in the diagram. 14 electron field What is the direction of the electric force acting on the electron? downwards into the paper upwards out of the paper to the left to the right 27 Which diagram shows the electric field between a positively charged metal sphere and an earthed metal plate? + + + + 28 Which electrical quantity would be the result of a calculation in which energy transfer is divided by charge? current potential difference power resistance 29 Two heating coils X and Y, of resistance and respectively, deliver the same power when 12 V is applied across X and 6 V is applied across Y. What is the ratio /? ¼ ½ 2 4 ULES 27 972/1/O/N/7
3 battery of negligible internal resistance is connected to two 1 resistors in series. 15 6. V 1 1 What charge flows through each of the 1 resistors in 1 minute?.3.6 3. 18 31 Two wires P and Q have resistances and respectively. Wire P is twice as long as wire Q and has twice the diameter of wire Q. The wires are made of the same material. What is the ratio?.5 1 2 4 32 potential divider consists of a fixed resistor R and a light-dependent resistor (LR). R V What happens to the voltmeter reading, and why does it happen, when the intensity of light on the LR increases? The voltmeter reading decreases because the LR resistance decreases. The voltmeter reading decreases because the LR resistance increases. The voltmeter reading increases because the LR resistance decreases. The voltmeter reading increases because the LR resistance increases. ULES 27 972/1/O/N/7 [Turn over
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