Cambridge A Level Physics 9702 — 2015 Oct/Nov Paper 1 · Variant 2

1 Which list shows increasing lengths from beginning to end? A 1 cm 1 nm 1 mm 1 µm B 1 µm 1 mm 1 nm 1 cm C 1 nm 1 µm 1 mm 1 cm D 1 mm 1 cm 1 µm 1 nm

Mark scheme: C

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2 Which equation contains only scalar quantities? A acceleration = mass force B power = time work C pressure = area force displaceme nt D velocity = time

Mark scheme: B

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3 The time T taken for a satellite to orbit the Earth on a circular path is given by the equation kr 3 T 2 = M where r is the radius of the orbit, M is the mass of the Earth and k is a constant. What are the SI base units of k ? A kg–1 m–3 s2 B kg–1 m3 s2 C kg m–3 s2 D kg m3 s2

Mark scheme: C

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4 Which row gives reasonable estimates for the mass and the speed of an adult running? mass / kg speed / m s–1 A 6 × 100 5 × 101 B 6 × 101 5 × 100 C 6 × 101 5 × 101 D 6 × 102 5 × 100

Mark scheme: B

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5 A student measures the time T for one complete oscillation of a pendulum of length l. Her results are shown in the table. l / m T / s 0.420 ± 0.001 1.3 ± 0.1 She uses the formula T = 2π l g to calculate the acceleration of free fall g. What is the best estimate of the percentage uncertainty in the value of g? A 0.02% B 4% C 8% D 16%

Mark scheme: D

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6 The diagram shows two complete pulses on the screen of a cathode-ray oscilloscope. A grid of 1 cm squares covers the screen. The time-base setting is 1 µs cm–1. 1 cm How long does each pulse last? A 2 µs B 3 µs C 4 µs D 6 µs

Mark scheme: A

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7 A boy throws a ball vertically upwards. It rises to a maximum height, where it is momentarily at rest, and then falls back to his hands. Which row gives the acceleration of the ball at various stages in its motion? (Take vertically upwards as positive. Ignore air resistance.) at maximum rising falling height A –9.81 m s–2 0 +9.81 m s–2 B –9.81 m s–2 –9.81 m s–2 –9.81 m s–2 C +9.81 m s–2 +9.81 m s–2 +9.81 m s–2 D +9.81 m s–2 0 –9.81 m s–2

Mark scheme: B

More questions on Equations of motion

8 The curved line PQR is the velocity-time graph for a car starting from rest. velocity R Q P S 0 0 5 time / s What is the average acceleration of the car over the first 5 s? A the area below the curve PQ B the area of the triangle PQS C the gradient of the straight line PQ D the gradient of the tangent at Q

Mark scheme: C

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9 A ball is released from rest above a horizontal surface. It strikes the surface and bounces several times. The velocity-time graph for the first two bounces is shown. 3.00 velocity / m s–1 2.00 0 0 0.30 0.50 0.70 time / s –2.00 What is the maximum height of the ball after the first bounce? A 0.20 m B 0.25 m C 0.45 m D 0.65 m

Mark scheme: A

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10 A bus takes a time of 25 s to reach a constant speed while travelling in a straight line. A graph of speed v against time t is shown. v 0 0 5 10 15 20 25 t / s Which graph shows the variation with t of the resultant force F on the bus? A B C D F F F F 0 0 0 0 0 5 10 15 20 25 0 5 10 15 20 25 0 5 10 15 20 25 0 5 10 15 20 25 t / s t / s t / s t / s

Mark scheme: A

More questions on Momentum and Newton’s laws of motion

11 A single horizontal force F is applied to a block X which is in contact with a separate block Y as shown. F X Y The blocks remain in contact as they accelerate along a horizontal frictionless surface. Air resistance is negligible. X has a greater mass than Y. Which statement is correct? A The acceleration of X is equal to force F divided by the mass of X. B The force that X exerts on Y is equal to F. C The force that X exerts on Y is less than F. D The force that X exerts on Y is less than the force that Y exerts on X.

Mark scheme: C

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12 A mass of 0.20 kg is suspended from the lower end of a light spring. A second mass of 0.10 kg is suspended from the first mass by a thread. The arrangement is allowed to come into static equilibrium and then the thread is burned through. spring 0.20 kg thread 0.10 kg At this instant, what is the upward acceleration of the 0.20 kg mass? (Assume g = 10 m s–2.) A 5.0 m s–2 B 6.7 m s–2 C 10 m s–2 D 15 m s–2

Mark scheme: A

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13 An object of mass m travelling with speed v has a head-on collision with another object of mass m travelling with speed v in the opposite direction. The two objects stick together after the collision. What is the total loss of kinetic energy in the collision? A 0 B 1 mv 2 C mv 2 D 2mv 2 2

Mark scheme: C

More questions on Linear momentum and its conservation

14 Two identical spheres X and Y approach each other with the speeds shown and undergo a head- on elastic collision. 4 m s–1 2 m s–1 X Y What are the velocities of the spheres after the collision? sphere X sphere Y A 0 m s–1 2 m s–1 B 2 m s–1 4 m s–1 C 2 m s–1 4 m s–1 D 4 m s–1 2 m s–1

Mark scheme: C

More questions on Linear momentum and its conservation

15 Which pair of forces acts only as a couple on the circular object? A B C D F F 2F F F 2F F F

Mark scheme: A

More questions on Turning effects of forces

16 A car of mass 500 kg is at rest at point X on a slope, as shown. The car’s brakes are released and the car rolls down the slope with its engine switched off. At point Y the car has moved through a vertical height of 30 m and has a speed of 11 m s–1. mass = 500 kg speed = 0 m s–1 X 30 m speed = 11 m s–1 Y What is the energy dissipated by frictional forces when the car moves from X to Y? A 3.0 × 104 J B 1.2 × 105 J C 1.5 × 105 J D 1.8 × 105 J

Mark scheme: B

More questions on Energy conservation

17 In which situation is no work done? A The air in a bicycle tyre is released because of a puncture. B A ball is dropped and falls to the ground. C A box moves at constant speed across a smooth horizontal surface. D A crane lifts a steel girder at constant speed.

Mark scheme: C

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18 An electric railway locomotive has a maximum mechanical output power of 4.0 MW. Electrical power is delivered at 25 kV from overhead wires. The overall efficiency of the locomotive in converting electrical power to mechanical power is 80 %. What is the current from the overhead wires when the locomotive is operating at its maximum power? A 130 A B 160 A C 200 A D 250 A

Mark scheme: C

More questions on Potential difference and power

19 The table summarises some descriptions of evaporation. Which row of the table is correct? involves a reduction in the involves a change in state occurs at a fixed average kinetic energy from liquid to vapour temperature of the remaining atoms A true true true B true false true C true false false D false true false

Mark scheme: B

More questions on Specific heat capacity and specific latent heat

20 The diagram shows the cross-section of an Olympic-size swimming pool filled with water. It is not drawn to scale. The density of the water is 1000 kg m–3. water 50 m 2.35 m 2.00 m Y X bottom 6.00 m of pool What is the difference in pressure between X and Y? A 0.35 kPa B 3.4 kPa C 21.3 kPa D 58.9 kPa

Mark scheme: B

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21 A force acts on a wire to produce extension e. The same force then acts on a second wire of the same material, but of half the diameter and three times the length of the first wire. Both wires obey Hooke’s law. What is the extension of the second wire? A 3e B 4e C 6e D 12e

Mark scheme: D

More questions on Stress and strain

22 Which statement about elastic and plastic deformation is correct? A Elastic deformation and plastic deformation are proportional to the applied force. B Elastic deformation and plastic deformation cause no change in volume. C Elastic deformation causes heating of the material but plastic deformation does not. D Elastic deformation is reversible but plastic deformation is not.

Mark scheme: D

More questions on Elastic and plastic behaviour

23 What is meant by the ultimate tensile stress of a ductile metal? A It is the maximum stress at which the material deforms elastically. B It is the maximum stress at which the material obeys Hooke’s law. C It is the maximum stress that the material can support without breaking. D It is the Young modulus multiplied by the maximum possible strain of a material.

Mark scheme: C

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24 A 0.80 m length of steel wire and a 1.4 m length of brass wire are joined together. The combined wires are suspended from a fixed support and a force of 40 N is applied, as shown. steel brass 40 N The Young modulus of steel is 2.0 × 1011 Pa. The Young modulus of brass is 1.0 × 1011 Pa. Each wire has a cross-sectional area of 2.4 × 10–6 m2. The wires extend without reaching their elastic limits. What is the total extension? Ignore the weights of the wires. A 1.7 × 10–4 m B 3.0 × 10–4 m C 3.9 × 10–4 m D 9.0 × 10–4 m

Mark scheme: B

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25 Which of the following wave motions may be used to demonstrate the phenomenon of polarisation? A a sound wave from a thunderclap B a surface wave in a water ripple tank C a stationary wave in an organ pipe D a stationary wave on a stretched wire

Mark scheme: D

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26 The diagram shows the screen of a cathode-ray oscilloscope (c.r.o.) displaying a wave. The time-base of the c.r.o. is set at 10 ms / div. What is the frequency of the wave? A 0.24 Hz B 4.2 Hz C 12 Hz D 24 Hz

Mark scheme: D

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27 P is a source emitting infra-red radiation and Q is a source emitting ultra-violet radiation. The figures in the table are suggested values for the wavelengths emitted by P and Q. Which row is correct? wavelength wavelength emitted by P / m emitted by Q / m A 5 × 10–5 5 × 10–8 B 5 × 10–5 5 × 10–10 C 5 × 10–7 5 × 10–8 D 5 × 10–7 5 × 10–10

Mark scheme: A

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28 The diagram shows a tuning fork above a tube of air of length 25 cm. 25 cm A stationary wave is set up in the tube with the same frequency as the tuning fork. The lower end of the tube is sealed. This is the minimum length of tube with the lower end sealed that creates a stationary wave. Which other lengths of tubes, sealed at their lower end, will also create a stationary wave? A 37.5 cm and 50 cm B 50 cm and 75 cm C 75 cm and 100 cm D 75 cm and 125 cm

Mark scheme: D

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29 White light consists of many wavelengths. The wavelength of red light R is approximately twice the wavelength of violet light V. When white light is incident normally on a diffraction grating, several spectra can be formed. Which diagram shows the possible distributions of light in the first order and the second order spectra? A B V 2nd order spectrum R 1st order 2nd order V spectrum V spectrum R R V 1st order R spectrum white white white C D R 2nd order spectrum V 1st order 2nd order R spectrum R spectrum V V R 1st order V spectrum white white white

Mark scheme: C

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30 To produce a stationary wave, two waves must travel in opposite directions through the same space. Which statement about the properties of the two waves must also be true? A The waves must have equal frequency, but a different speed and wavelength. B The waves must have equal speed, but a different wavelength and frequency. C The waves must have equal speed, frequency and wavelength. D The waves must have equal wavelength, but a different speed and frequency.

Mark scheme: C

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31 A potential difference is applied between two metal plates that are not parallel. Which diagram shows the electric field between the plates? A B + – + – C D + – + –

Mark scheme: A

More questions on Electric fields and field lines

32 A particle situated between two parallel metal plates carries a charge of 8 × 10–19 C. The potential difference (p.d.) between the plates is 2000 V. A force of 3.2 × 10–13 N due to the electric field acts on the particle. What is the distance between the plates? A 5 mm B 8 mm C 5 cm D 8 cm

Mark scheme: A

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33 Which unit is equivalent to a coulomb (C)? A A s B Ω s C V s D W s

Mark scheme: A

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34 The graph shows the I-V characteristic of an electrical component. I 0 0 0 V What is the component? A a filament lamp B a metallic conductor at constant temperature C a semiconductor diode D a thermistor

Mark scheme: C

More questions on Resistance and resistivity

35 A power supply of electromotive force (e.m.f.) 12 V and internal resistance 2 Ω is connected in series with a load resistor. The resistance of the load resistor is varied from 0.5 Ω to 4 Ω. Which graph shows how the power P dissipated in the load resistor varies with the resistance of the load resistor? A B P P 0 0 0 1 2 3 4 0 1 2 3 4 resistance of load / Ω resistance of load / Ω C D P P 0 0 0 1 2 3 4 0 1 2 3 4 resistance of load / Ω resistance of load / Ω

Mark scheme: A

More questions on Practical circuits

36 The diagram shows an arrangement of resistors. 10 Ω X 10 Ω 10 Ω Y 10 Ω What is the total electrical resistance between X and Y? A less than 1 Ω B between 1 Ω and 10 Ω C between 10 Ω and 30 Ω D 40 Ω

Mark scheme: B

More questions on Practical circuits

37 The electromotive force of a power supply is 120 V. It delivers a current of 1.2 A to a resistor of resistance 80 Ω and a current of 0.40 A to another resistor, as shown. e.m.f. of supply 120 V 1.2 A 80 Ω 0.40 A What is the internal resistance of the power supply? A 15 Ω B 20 Ω C 60 Ω D 75 Ω

Mark scheme: A

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38 The diagram shows a four-terminal box connected to a battery and two ammeters. 1 3 A A 2 4 The currents in the two meters are identical. Which circuit, within the box, will give this result? A B C D 1 3 1 3 1 3 1 3 2 4 2 4 2 4 2 4

Mark scheme: D

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39 A material contains a radioactive isotope that disintegrates solely by the emission of α-particles at a rate of 100 s–1. Which statement about this material is correct? A The number of atoms in the material diminishes at a rate of 100 s–1. B The number of neutrons in the material diminishes at a rate of 100 s–1. C The number of nucleons in the material diminishes at a rate of 400 s–1. D The number of protons in the material diminishes at a rate of 100 s–1.

Mark scheme: C

More questions on Radioactive decay

40 A radioactive nucleus emits an α-particle or a β-particle, creating a product nucleus. Which decay process could create the product nucleus stated? radioactive nucleus decay product nucleus A 226 Ra α 224 Rn 88 86 B 238 U α 242 Pu 92 94 C 228 Ra β 228 Fr 88 87 D 231 Th β 231 Pa 90 91

Mark scheme: D

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