Cambridge A Level Physics 9702 — 2015 May/June Paper 1 · Variant 3

Question 1

1 Which statement includes a correct unit? A energy = 7.8 N s B force = 3.8 N s C momentum = 6.2 N s D torque = 4.7 N s

Accepted Answer

C

Question 2

2 What is the joule (J) in SI base units? A kg m s–1 B kg m2 s–1 C kg m s–2 D kg m2 s–2

Accepted Answer

D

Question 3

3 The speed of an aeroplane in still air is 200 km h–1. The wind blows from the west at a speed of 85.0 km h–1. In which direction must the pilot steer the aeroplane in order to fly due north? A 23.0° east of north B 23.0° west of north C 25.2° east of north D 25.2° west of north

Accepted Answer

D

Question 4

4 A student is given a reel of wire of diameter less than 0.2 mm and is asked to find the density of the metal. Which pair of instruments would be most suitable for finding the volume of the wire? A balance and micrometer B metre rule and micrometer C metre rule and vernier calipers D micrometer and vernier calipers

Accepted Answer

B

Question 5

5 Four different students use a ruler to measure the length of a 15.0 cm pencil. Their measurements are recorded on four different charts. Which chart shows measurements that are precise but not accurate? A B C D 15.4 15.4 15.4 15.4 15.2 15.2 15.2 15.2 15.0 15.0 15.0 15.0 length / cm 14.8 length / cm 14.8 length / cm 14.8 length / cm 14.8 14.6 14.6 14.6 14.6 14.4 14.4 14.4 14.4 14.2 14.2 14.2 14.2 14.0 14.0 14.0 14.0 13.8 13.8 13.8 13.8

Accepted Answer

B

Question 6

6 In a simple electrical circuit, the current in a resistor is measured as (2.50 ± 0.05) mA. The resistor is marked as having a value of 4.7 Ω ± 2 %. If these values were used to calculate the power dissipated in the resistor, what would be the percentage uncertainty in the value obtained? A 2 % B 4 % C 6 % D 8 %

Accepted Answer

C

Question 7

7 A raindrop falls vertically from rest in air. The variation with time of the speed of the raindrop is shown in the graph. speed Y Z X 00 time Which statement about the raindrop is correct? A At point X, the raindrop has an acceleration of 9.81 m s–2. B At point Z, the force on the raindrop due to air resistance has reached its maximum value and so the acceleration of the raindrop has also reached its maximum value. C At point Z, the force due to air resistance is equal and opposite to the weight of the raindrop and so the speed of the raindrop is zero. D The resultant force on the raindrop at point Y is less than the resultant force on the raindrop at point X.

Accepted Answer

D

Question 8

8 The velocity of an electric car changes as shown. 150 velocity / km h–1 100 50 0 0 1 2 3 4 time / s What is the acceleration of the car? A 210 m s–2 B 58 m s–2 C 26 m s–2 D 7.3 m s–2

Accepted Answer

D

Question 9

9 A body falling in a uniform gravitational field encounters air resistance. The air resistance increases until terminal velocity is reached. Which factor does not affect its terminal velocity? A the density of the air B the height from which the body falls C the mass of the body D the shape of the body

Accepted Answer

B

Question 10

10 Which of the following is a statement of the principle of conservation of momentum? A Momentum is the product of mass and velocity. B In an elastic collision, momentum is constant. C The momentum of an isolated system is constant. D The force acting on a body is proportional to its rate of change of momentum.

Accepted Answer

C

Question 11

11 A moving object strikes a stationary object. The collision is inelastic. The objects move off together. Which row shows the possible values of total momentum and total kinetic energy for the system before and after the collision? total momentum total momentum total kinetic total kinetic before collision after collision energy before energy after / kg m s–1 / kg m s–1 collision / J collision / J A 6 2 90 30 B 6 6 30 90 C 6 6 90 30 D 6 6 90 90

Accepted Answer

C

Question 12

12 Two balls X and Y are moving towards each other with speeds of 5 m s–1 and 15 m s–1 respectively. 5 m s–1 15 m s–1 X Y They make a perfectly elastic head-on collision and ball Y moves to the right with a speed of 7 m s–1. What is the speed and direction of ball X after the collision? A 3 m s–1 to the left B 13 m s–1 to the left C 3 m s–1 to the right D 13 m s–1 to the right

Accepted Answer

B

Question 13

13 A wooden block is freely supported on brackets at a height of 4.0 m above the ground, as shown. wooden block of mass 95 g impact bracket velocity 200 m s–1 4.0 m bullet of mass 5.0 g A bullet of mass 5.0 g is shot vertically upwards into the wooden block of mass 95 g. It embeds itself in the block. The impact causes the block to rise above its supporting brackets. The bullet hits the block with a velocity of 200 m s–1. How far above the ground will the block be at the maximum height of its path? A 5.1 m B 5.6 m C 9.1 m D 9.6 m

Accepted Answer

C

Question 14

14 Four cuboids with identical length, breadth and height are immersed in water. The cuboids are held at the same depth and in identical orientations by vertical rods, as shown. W X Y Z 4 ρ 2 ρ ρ 0.5 ρ Water has density ρ. Cuboid W is made of material of density 4ρ. Cuboid X is made of material of density 2ρ. Cuboid Y is made of material of density ρ. Cuboid Z is made of material of density 0.5ρ. Which statement is correct? A The upthrust of the water on each of the cuboids is the same. B The upthrust of the water on W is twice the upthrust of the water on X. C The upthrust of the water on X is twice the upthrust of the water on W. D The upthrust of the water on Y is zero.

Accepted Answer

A

Question 15

15 An air bubble in a tank of water is rising with constant velocity. The forces acting on the bubble are X, Y and Z as shown. X velocity air bubble Y Z What describes the three forces? A Z is the viscous drag on the bubble, Y is the weight of the bubble, X is the upthrust on the bubble and X = Y + Z. B Z is the viscous drag on the bubble, Y is the weight of the bubble, X is the upthrust on the bubble and X > Y + Z. C Z is the weight of the bubble, Y is the viscous drag on the bubble, X is the upthrust on the bubble and X = Y + Z. D Z is the weight of the bubble, Y is the viscous drag on the bubble, X is the upthrust on the bubble and X > Y + Z.

Accepted Answer

A

Question 16

16 The diagrams represent systems of coplanar forces acting at a point. The lengths of the force vectors represent the magnitudes of the forces. Which system of forces is in equilibrium? A B C D

Accepted Answer

A

Question 17

17 The gas in an engine does work on a piston of cross-sectional area 80 cm2. The pressure on the piston has a constant value of 4.6 × 105 Pa. 25 cm force of gas pushing piston final position initial position of piston of piston How much work is done by the gas on the piston when it moves through a distance of 25 cm? A 9.2 × 102 J B 9.2 × 104 J C 9.2 × 106 J D 9.2 × 108 J

Accepted Answer

A

Question 18

18 A loaded aeroplane has a total mass of 1.2 × 105 kg while climbing after take-off. It climbs at an angle of 23° to the horizontal with a speed of 50 m s–1. What is the rate at which it is gaining potential energy at this time? A 2.3 × 106 J s–1 B 2.5 × 106 J s–1 C 2.3 × 107 J s–1 D 2.5 × 107 J s–1

Accepted Answer

C

Question 19

19 When a horizontal force F is applied to a frictionless trolley over a distance s, the kinetic energy of the trolley changes from 4.0 J to 8.0 J. If a force of 2F is applied to the trolley over a distance of 2s, what will the original kinetic energy of 4.0 J become? A 16 J B 20 J C 32 J D 64 J

Accepted Answer

B

Question 20

20 When ice melts, it contracts. Which row is correct for ice turning into water? distance between density molecules A decreases decreases B decreases increases C increases decreases D increases increases

Accepted Answer

B

Question 21

21 A W-shaped tube contains two amounts of mercury, each open to the atmosphere. Air at pressure P is trapped in between them. The diagram shows two vertical distances x and y. atmospheric atmospheric pressure pressure air at NOT TO pressure P SCALE x y 50 mm mercury Atmospheric pressure is equal to the pressure that would be exerted by a column of mercury of height 760 mm. The pressure P is expressed in this way. Which values of x, y and P are possible? P / mm of x / mm y / mm mercury A 20 20 780 B 20 30 780 C 30 20 810 D 30 30 790

Accepted Answer

B

Question 22

22 A steel bar of circular cross-section is under tension T, as shown. The diameter of the wide portion is double the diameter of the narrow portion. T T stress in the wide portion What is the value of ? stress in the narrow portion A 0.25 B 0.50 C 2.0 D 4.0

Accepted Answer

A

Question 23

23 The graph shows the non-linear force-extension curve for a wire made from a new composite material. F / N 100 P 0 0 1.0 2.0 x / mm What could be the value of the strain energy stored in the wire when it is stretched elastically to point P? A 0.09 J B 0.10 J C 0.11 J D 0.20 J

Accepted Answer

C

Question 24

24 The diagram shows the stress-strain graph for bone. stress 2 / 106 N m–2 1 0 0 0.5 1.0 1.5 strain / % What is the Young modulus of bone? A 1 × 106 N m–2 B 2 × 106 N m–2 C 1 × 108 N m–2 D 2 × 108 N m–2

Accepted Answer

D

Question 25

25 A cathode-ray oscilloscope (c.r.o.) is used to display the trace from a sound wave. The time-base is set at 5 µs mm–1. 1 cm 1 cm What is the frequency of the sound wave? A 6.7 Hz B 67 Hz C 6.7 kHz D 67 kHz

Accepted Answer

C

Question 26

26 A wave pulse moves along a stretched rope in the direction shown. P Which diagram correctly shows the variation with time t of the displacement s of the particle P in the rope? A B s s t t C D s s t t

Accepted Answer

D

Question 27

27 The table contains statements about stationary and progressive waves. Which row is correct? stationary wave progressive wave A all particles vibrate all particles vibrate with the same amplitude with the same amplitude B energy is transferred energy is transferred along the wave along the wave C particles in adjacent particles vibrate in phase loops vibrate in antiphase with their immediate neighbours D particles one wavelength particles one wavelength apart vibrate in phase apart vibrate in phase

Accepted Answer

D

Question 28

28 Which electromagnetic wave would cause the most significant diffraction effect for an atomic lattice of spacing around 10–10 m? A infra-red B microwave C ultraviolet D X-ray

Accepted Answer

D

Question 29

29 Wave generators at points X and Y produce water waves of the same wavelength. At point Z, the waves from X have the same amplitude as the waves from Y. Distances XZ and YZ are as shown. X Y 24 cm 34 cm Z When the wave generators operate in phase, the amplitude of oscillation at Z is zero. What could be the wavelength of the waves? A 2 cm B 3 cm C 4 cm D 6 cm

Accepted Answer

C

Question 30

30 A molecule behaves as an electric dipole consisting of two equal point charges, of opposite sign, separated by a fixed distance. The molecule moves with constant horizontal velocity as it enters a vertical uniform electric field, as shown. +– molecule electric field The positive and negative charges of the molecule enter the field at the same time. Which row describes the velocity of the molecule in the field? horizontal component vertical component of velocity of velocity A constant increases B constant zero C increases increases D increases zero

Accepted Answer

B

Question 31

31 Which diagram best represents the electric field between two point charges of equal magnitude and opposite sign? A B C D + + + + – – – –

Accepted Answer

D

Question 32

32 A pedal bicycle is fitted with an electric motor. The rider switches on the motor for a time of 3.0 minutes. A constant current of 3.5 A in the electric motor is provided from a battery with a terminal voltage of 24 V. What is the energy supplied by the battery? A 84 J B 250 J C 630 J D 15 000 J

Accepted Answer

D

Question 33

33 The diagram shows a simple circuit. S R Which statement is correct? A When switch S is closed, the electromotive force (e.m.f.) of the battery falls because work is done against the internal resistance of the battery. B When switch S is closed, the e.m.f. of the battery falls because work is done against the resistance of R. C When switch S is closed, the potential difference across the battery falls because work is done against the internal resistance of the battery. D When switch S is closed, the potential difference across the battery falls because work is done against the resistance of R.

Accepted Answer

C

Question 34

34 A simple circuit is formed by connecting a resistor of resistance R between the terminals of a battery of electromotive force (e.m.f.) 9.0 V and constant internal resistance r. 9.0 V r R A charge of 6.0 C flows through the resistor in a time of 2.0 minutes causing it to dissipate 48 J of thermal energy. What is the internal resistance r of the battery? A 0.17 Ω B 0.33 Ω C 20 Ω D 160 Ω

Accepted Answer

C

Question 35

35 A source of e.m.f. 9.0 mV has an internal resistance of 6.0 Ω. It is connected across a galvanometer of resistance 30 Ω. What is the current in the galvanometer? A 250 µA B 300 µA C 1.5 mA D 2.5 mA

Accepted Answer

A

Question 36

36 A box with four terminals P, Q, R and S contains two identical resistors. P Q S R When a battery of electromotive force (e.m.f.) E and negligible internal resistance is connected E . across PS, a high-resistance voltmeter connected across QR reads 2 Which diagram shows the correct arrangement of the two resistors inside the box? A B P Q P Q S R S R C D P Q P Q S R S R

Accepted Answer

A

Question 37

37 The diagram shows part of a current-carrying circuit. The ammeter has negligible resistance. 1.0 Ω 2.0 Ω A 5.0 A 5.0 A 5.0 Ω What is the reading on the ammeter? A 0.7 A B 1.3 A C 1.5 A D 1.7 A

Accepted Answer

C

Question 38

38 Nucleus P decays in two stages to produce nucleus Q. Which decay sequence will result in the highest number of neutrons in nucleus Q? A an α-particle followed by a β-particle B an α-particle followed by a γ-ray C a β-particle followed by another β-particle D a β-particle followed by a γ-ray

Accepted Answer

D

Question 39

39 A neutral atom has a nucleus given by the symbol 133 Cs . 55 How many protons, neutrons and electrons are in this atom? protons neutrons electrons A 55 78 55 B 55 133 55 C 78 55 78 D 133 55 133

Accepted Answer

A

Question 40

40 The nuclear equation for a fission reaction is shown below. 235 U +  n 1 0   → 93 Rb + 141 Cs +  Y n 1 0 92 X 55 What are the values of X and Y? X Y A 37 0 B 37 1 C 37 2 D 38 2

Accepted Answer

C

Question paper20 pages

Mark scheme2 pages

Questions as text

Q1 · Which statement includes a correct unit?

Q2 · What is the joule (J) in SI base units?

Q3 · The speed of an aeroplane in still air is 200 km h–1

Q4 · A student is given a reel of wire of diameter less than 0.2 mm and is asked to find the…

Q5 · Four different students use a ruler to measure the length of a 15.0 cm pencil

Q6 · In a simple electrical circuit, the current in a resistor is measured as (2.50 ± 0.05) mA

Q7 · A raindrop falls vertically from rest in air

Q8 · The velocity of an electric car changes as shown

Q9 · A body falling in a uniform gravitational field encounters air resistance

Q10 · Which of the following is a statement of the principle of conservation of momentum?

Q11 · A moving object strikes a stationary object

Q12 · Two balls X and Y are moving towards each other with speeds of 5 m s–1 and 15 m s–1…

Q13 · A wooden block is freely supported on brackets at a height of 4.0 m above the ground, as…

Q14 · Four cuboids with identical length, breadth and height are immersed in water

Q15 · An air bubble in a tank of water is rising with constant velocity

Q16 · The diagrams represent systems of coplanar forces acting at a point

Q17 · The gas in an engine does work on a piston of cross-sectional area 80 cm2

Q18 · A loaded aeroplane has a total mass of 1.2 × 105 kg while climbing after take-off

Q19 · When a horizontal force F is applied to a frictionless trolley over a distance s, the…

Q20 · When ice melts, it contracts

Q21 · A W-shaped tube contains two amounts of mercury, each open to the atmosphere

Q22 · A steel bar of circular cross-section is under tension T, as shown

Q23 · The graph shows the non-linear force-extension curve for a wire made from a new composite…

Q24 · The diagram shows the stress-strain graph for bone

Q25 · A cathode-ray oscilloscope (c.r.o.) is used to display the trace from a sound wave

Q26 · A wave pulse moves along a stretched rope in the direction shown

Q27 · The table contains statements about stationary and progressive waves

Q28 · Which electromagnetic wave would cause the most significant diffraction effect for an…

Q29 · Wave generators at points X and Y produce water waves of the same wavelength

Q30 · A molecule behaves as an electric dipole consisting of two equal point charges, of…

Q31 · Which diagram best represents the electric field between two point charges of equal…

Q32 · A pedal bicycle is fitted with an electric motor

Q33 · The diagram shows a simple circuit

Q34 · A simple circuit is formed by connecting a resistor of resistance R between the terminals…

Q35 · A source of e.m.f

Q36 · A box with four terminals P, Q, R and S contains two identical resistors

Q37 · The diagram shows part of a current-carrying circuit

Q38 · Nucleus P decays in two stages to produce nucleus Q

Q39 · A neutral atom has a nucleus given by the symbol 133 Cs

Q40 · The nuclear equation for a fission reaction is shown below

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