Cambridge A Level Physics 9702 — 2016 Oct/Nov Paper 1 · Variant 1

Question 1

1 What is the order of magnitude of the Young modulus for a metal such as copper? A 10–11 Pa B 10–4 Pa C 104 Pa D 1011 Pa

Accepted Answer

D

Question 2

2 The force F between two point charges q1 and q2, a distance r apart, is given by the equation kq q F = 1 2 r 2 where k is a constant. What are the SI base units of k ? A kg m3 s–4 A2 B kg m3 s–4 A–2 C kg m3 A2 D kg m3 A–2

Accepted Answer

B

Question 3

3 An aeroplane can fly at a velocity X when moving through still air. When flying in wind the aeroplane’s velocity relative to the ground is Y. Which vector diagram shows the magnitude and direction of the wind velocity W ? A B C D Y Y W Y W W X X Y X X W

Accepted Answer

A

Question 4

4 A voltmeter gives readings that are larger than the true values and has a systematic error that varies with voltage. Which graph shows the calibration curve for the voltmeter? A B true 4 true 4 value / V value / V 3 3 2 2 1 1 0 0 0 1 2 3 4 0 1 2 3 4 meter reading / V meter reading / V C D true 4 true 4 value / V value / V 3 3 2 2 1 1 0 0 0 1 2 3 4 0 1 2 3 4 meter reading / V meter reading / V

Accepted Answer

A

Question 5

5 A student uses a cathode-ray oscilloscope (c.r.o.) to measure the period of a signal. She sets the time-base of the c.r.o. to 5 ms cm–1 and observes the trace illustrated below. The trace has a length of 10.0 cm. 10.0 cm What is the period of the signal? A 7.1 × 10–6 s B 1.4 × 10–5 s C 7.1 × 10–3 s D 1.4 × 10–2 s

Accepted Answer

D

Question 6

6 A cyclist pedals along a raised horizontal track. At the end of the track, he travels horizontally into the air and onto a track that is vertically 2.0 m lower. v higher horizontal track 2.0 m lower horizontal track 6.0 m The cyclist travels a horizontal distance of 6.0 m in the air. Air resistance is negligible. What is the horizontal velocity v of the cyclist at the end of the higher track? A 6.3 m s–1 B 9.4 m s–1 C 9.9 m s–1 D 15 m s–1

Accepted Answer

B

Question 7

7 An astronaut on the Moon, where there is no air resistance, throws a ball. The ball’s initial velocity has a vertical component of 8.00 m s–1 and a horizontal component of 4.00 m s–1, as shown. initial velocity path of ball 8.00 m s–1 4.00 m s–1 The acceleration of free fall on the Moon is 1.62 m s–2. What will be the speed of the ball 9.00 s after being thrown? A 6.6 m s–1 B 7.7 m s–1 C 10.6 m s–1 D 14.6 m s–1

Accepted Answer

B

Question 8

8 A car is travelling at constant velocity. At time t = 0, the driver of the car sees an obstacle in the road and then brakes to a halt. The graph shows the variation with t of the velocity of the car. velocity / m s–1 20 0 0 0.8 5.0 t / s How far does the car travel in the 5.0 s after the driver sees the obstacle? A 16 m B 42 m C 58 m D 84 m

Accepted Answer

C

Question 9

9 A car is stationary at traffic lights. When the traffic lights change to green, the driver presses down sharply on the accelerator. The resultant horizontal force acting on the car varies with time as shown. force 0 0 time Which graph shows the variation with time of the speed of the car? A B speed speed 0 0 0 time 0 time C D speed speed 0 0 0 time 0 time

Accepted Answer

A

Question 10

10 A beach-ball falls vertically from a high hotel window. Air resistance is not negligible. Which graph shows the variation with time t of the acceleration a of the ball? A B a a 0 0 0 t 0 t C D a a 0 0 0 t 0 t

Accepted Answer

C

Question 11

11 A car has mass m. A person needs to push the car with force F in order to give the car acceleration a. The person needs to push the car with force 2F in order to give the car acceleration 3a. Which expression gives the constant resistive force opposing the motion of the car? A ma B 2ma C 3ma D 4ma

Accepted Answer

A

Question 12

12 A box is shown resting on the ground. Newton’s third law implies that four forces of equal magnitude are involved. These forces are labelled P, Q, R and S. Forces P and Q act on the box. Forces R and S act on the Earth. For clarity, the forces are shown slightly separated. P box ground Q R S Which statement about the forces is correct? A P is the equal and opposite force to Q and both are forces of contact. B Q is the equal and opposite force to P and both are gravitational forces. C R is the equal and opposite force to S and both are forces of contact. D S is the equal and opposite force to Q and both are gravitational forces.

Accepted Answer

D

Question 13

13 Two spheres travel along the same line with velocities u1 and u2. They collide and after collision their velocities are v1 and v2. before collision u1 before collision u2 after collision v1 after collision v2 Which collision is not elastic? u1 / m s–1 u2 / m s–1 v1 / m s–1 v2 / m s–1 A 2 –5 –5 –2 B 3 –3 0 6 C 3 –2 1 6 D 5 2 3 6

Accepted Answer

A

Question 14

14 A submarine has circular windows of diameter 0.30 m. The windows can experience a maximum external pressure of 660 kPa before they crack. What is the minimum external force needed to crack the windows? A 47 000 N B 190 000 N C 310 000 N D 620 000 N

Accepted Answer

A

Question 15

15 Four beams of the same length each have three forces acting on them. Which beam has both zero resultant force and zero resultant torque acting? A B 30 N 50 N 36 N 70 N 50 cm 30 cm 50 cm 30 cm 90 N 106 N C D 28 N 35 N 42 N 70 N 50 cm 30 cm 50 cm 30 cm 63 N 112 N

Accepted Answer

D

Question 16

16 An air-conditioning unit is supported by a rigid beam PQ, as shown. air-conditioning unit P wall beam Q Which diagram shows the directions of the horizontal and vertical forces acting on the ends of the beam? A B C D

Accepted Answer

B

Question 17

17 A hydroelectric power station uses the gravitational potential energy of water to generate electrical energy. In one particular power station, the mass of water flowing per unit time is 1.5 × 105 kg s–1. The water falls through a height of 120 m. The electrical power generated is 100 MW. What is the efficiency of the power station? A 5.6% B 43% C 57% D 68%

Accepted Answer

C

Question 18

18 An engine transforms thermal energy into mechanical work. The engine takes in thermal energy Qin from a heat source and gives out thermal energy Qout to a heat sink, producing useful work W. heat source Qin engine W Qout heat sink What is the efficiency of this engine? A W B W C W D W Q + Q Q − Q Q Q in out in out in out

Accepted Answer

C

Question 19

19 A truck of mass 500 kg moves from rest at the top of a section of track 400 m long and 30 m high, as shown. The frictional force acting on the truck is 250 N throughout its journey. 400 m 30 m What is the final speed of the truck? A 14 m s–1 B 24 m s–1 C 31 m s–1 D 190 m s–1

Accepted Answer

A

Question 20

20 Which condition must apply for the work done by an expanding gas to be p∆V, where p is the pressure of the gas and ∆V is its change in volume? A No thermal energy must be supplied to the gas. B The expansion must be at a constant rate. C The pressure must be constant. D The temperature of the gas must be constant.

Accepted Answer

C

Question 21

21 A metal wire is stretched to breaking point and the force-extension graph is plotted. Which graph is correctly labelled with the elastic region, the plastic region and the area representing the work done to stretch the wire until it breaks? A B plastic elastic elastic region plastic region force / N region force / N region work done work done 0 0 0 extension / m 0 extension / m C D plastic plastic elastic region elastic region force / N region force / N region work done work done 0 0 0 extension / m 0 extension / m

Accepted Answer

D

Question 22

22 A copper wire hangs vertically from a fixed point. A load is attached to the lower end of the wire producing an extension x. The wire obeys Hooke’s law. Which single change gives an extension 2x? A Halve the cross-sectional area of the wire. B Halve the diameter of the wire. C Halve the length of the wire. D Halve the load on the wire.

Accepted Answer

A

Question 23

23 The table shows the wavelengths of five electromagnetic waves. Which row correctly identifies the principal radiation for each of these wavelengths? 10–14 m 10–10 m 10–6 m 10–2 m 102 m A gamma ray X-ray infra-red microwave radio wave B radio wave microwave infra-red X-ray gamma ray C radio wave microwave ultraviolet infra-red X-ray D X-ray infra-red ultraviolet microwave radio wave

Accepted Answer

A

Question 24

24 The diagram shows an experiment to produce a stationary wave in an air column. A tuning fork, placed above the column, vibrates and produces a sound wave. The length of the air column can be varied by altering the volume of the water in the tube. tuning fork air column water tap The tube is filled and then water is allowed to run out of it. The first two stationary waves occur when the air column lengths are 0.14 m and 0.42 m. What is the wavelength of the sound wave? A 0.14 m B 0.28 m C 0.42 m D 0.56 m

Accepted Answer

D

Question 25

25 The graph shows the variation with time of the displacement X of a gas molecule as a continuous sound wave passes through a gas. X 0 0 125 250 375 500 625 750 875 1000 time / µs The velocity of sound in the gas is 330 m s–1. All the graphs below have the same zero time as the graph above. What is the displacement-time graph for a molecule that is a distance of 0.165 m further away from the source of the sound? A B X X 0 0 0 125 250 375 500 625 750 875 1000 0 125 250 375 500 625 750 875 1000 time / µs time / µs C D X X 0 0 0 125 250 375 500 625 750 875 1000 0 125 250 375 500 625 750 875 1000 time / µs time / µs

Accepted Answer

D

Question 26

26 The warning signal on an ambulance has a frequency of 600 Hz. The speed of sound is 330 m s–1. The ambulance is travelling with a constant velocity of 25 m s–1 towards an observer. initial position final position of ambulance of ambulance observer Which overall change in observed frequency takes place between the times at which the ambulance is a long way behind the observer and when it is a long way in front of the observer? A 49 Hz B 84 Hz C 91 Hz D 98 Hz

Accepted Answer

C

Question 27

27 Diagrams X and Y show the passage of water waves around an obstacle and through a gap. The thick lines are barriers to the waves and each thin line represents a wavefront. X Y Which statement is correct? A Diagrams X and Y both illustrate diffraction. B Diagrams X and Y both illustrate interference. C Only diagram X illustrates interference. D Only diagram Y illustrates diffraction.

Accepted Answer

A

Question 28

28 The diagram shows a long rope fixed at one end. The other end is moved up and down, setting up a stationary wave. vibration fixed up and X Y end down What is the phase difference between the oscillations at X and at Y? A 0 B 45° C 90° D 135°

Accepted Answer

A

Question 29

29 A diffraction grating is used to measure the wavelength of monochromatic light. The spacing of the slits in the grating is 1.15 × 10–6 m. The angle between the first order diffraction maxima is 60.0°, as shown in the diagram. grating monochromatic 60.0° light What is the wavelength of the light? A 288 nm B 498 nm C 575 nm D 996 nm

Accepted Answer

C

Question 30

30 Which path shows a possible movement of an electron in the electric field shown? A B path of electron D C

Accepted Answer

A

Question 31

31 The diagram shows an electric field pattern caused by two positive and two negative point charges of equal magnitude placed at the four corners of a square. In which direction does the force act on an electron at point X? + – A B X D C – +

Accepted Answer

B

Question 32

32 Two large horizontal metal plates are separated by 4 mm. The lower plate is at a potential of –80 V. 4 mm –80 V Which potential should be applied to the upper plate to create an electric field of strength 60 000 V m–1 upwards in the space between the plates? A –320 V B –160 V C +160 V D +320 V

Accepted Answer

A

Question 33

33 An electric kettle is marked 3.10 kW. It is used with an electrical supply of 240 V. What is the electric current in the kettle and what is the kettle’s electrical resistance when working? current / A resistance / Ω A 0.0129 18 600 B 0.0770 3100 C 12.9 18.6 D 12.9 3100

Accepted Answer

C

Question 34

34 A thick copper wire is connected to a thin copper wire in series with a cell, as shown. thick wire thin wire What is significantly less in the thick wire than in the thin wire? A the charge passing a point per unit time B the drift speed of the electrons C the number density of the free electrons D the number of free electrons passing a point per unit time

Accepted Answer

B

Question 35

35 What is a typical value for the order of magnitude of the resistivity of copper? A 10–13 Ω m B 10–8 Ω m C 10–3 Ω m D 102 Ω m

Accepted Answer

B

Question 36

36 In the circuit shown, the reading on the ammeter is zero. R1 R3 A R2 R4 The four resistors have different resistances R1, R2, R3 and R4. Which equation is correct? A R1 – R3 = R2 – R4 B R1 × R3 = R2 × R4 C R1 – R4 = R2 – R3 D R1 × R4 = R2 × R3

Accepted Answer

D

Question 37

37 The diagram shows currents I1, I2, I3, I4 and I5 in different branches of a circuit. I1 I2 I3 I4 I5 Which equation is correct? A I1 = I2 + I3 B I2 = I1 + I3 C I3 = I4 + I5 D I4 = I5 + I3

Accepted Answer

A

Question 38

38 What is a proton? A a hadron B a particle consisting of two down quarks and one up quark C a positive fundamental particle D a positive lepton

Accepted Answer

A

Question 39

39 What are the correct descriptions of a γ-ray and a β– particle? γ-ray β– particle A high-speed electron electromagnetic radiation B electromagnetic radiation helium-4 nucleus C electromagnetic radiation high-speed electron D high-speed electron helium-4 nucleus

Accepted Answer

C

Question 40

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? A P and S are identical in all respects. B P and S are isotopes of the same element. C S is a different element of lower atomic number. D S is a different element of reduced mass.

Accepted Answer

B

Question paper20 pages

Mark scheme2 pages

Questions as text

Q1 · What is the order of magnitude of the Young modulus for a metal such as copper?

Q2 · The force F between two point charges q1 and q2, a distance r apart, is given by the…

Q3 · An aeroplane can fly at a velocity X when moving through still air

Q4 · A voltmeter gives readings that are larger than the true values and has a systematic…

Q5 · A student uses a cathode-ray oscilloscope (c.r.o.) to measure the period of a signal

Q6 · A cyclist pedals along a raised horizontal track

Q7 · An astronaut on the Moon, where there is no air resistance, throws a ball

Q8 · A car is travelling at constant velocity

Q9 · A car is stationary at traffic lights

Q10 · A beach-ball falls vertically from a high hotel window

Q11 · A car has mass m

Q12 · A box is shown resting on the ground

Q13 · Two spheres travel along the same line with velocities u1 and u2

Q14 · A submarine has circular windows of diameter 0.30 m

Q15 · Four beams of the same length each have three forces acting on them

Q16 · An air-conditioning unit is supported by a rigid beam PQ, as shown

Q17 · A hydroelectric power station uses the gravitational potential energy of water to…

Q18 · An engine transforms thermal energy into mechanical work

Q19 · A truck of mass 500 kg moves from rest at the top of a section of track 400 m long and 30…

Q20 · Which condition must apply for the work done by an expanding gas to be p∆V, where p is…

Q21 · A metal wire is stretched to breaking point and the force-extension graph is plotted

Q22 · A copper wire hangs vertically from a fixed point

Q23 · The table shows the wavelengths of five electromagnetic waves

Q24 · The diagram shows an experiment to produce a stationary wave in an air column

Q25 · The graph shows the variation with time of the displacement X of a gas molecule as a…

Q26 · The warning signal on an ambulance has a frequency of 600 Hz

Q27 · Diagrams X and Y show the passage of water waves around an obstacle and through a gap

Q28 · The diagram shows a long rope fixed at one end

Q29 · A diffraction grating is used to measure the wavelength of monochromatic light

Q30 · Which path shows a possible movement of an electron in the electric field shown?

Q31 · The diagram shows an electric field pattern caused by two positive and two negative point…

Q32 · Two large horizontal metal plates are separated by 4 mm

Q33 · An electric kettle is marked 3.10 kW

Q34 · A thick copper wire is connected to a thin copper wire in series with a cell, as shown

Q35 · What is a typical value for the order of magnitude of the resistivity of copper?

Q36 · In the circuit shown, the reading on the ammeter is zero

Q37 · The diagram shows currents I1, I2, I3, I4 and I5 in different branches of a circuit

Q38 · What is a proton?

Q39 · What are the correct descriptions of a γ-ray and a β– particle?

Q40 · In a radioactive decay series, three successive decays each result in a particle being…

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