Cambridge IGCSE Physics (9-1) 0972 — 2020 May/June Paper 2 · Variant 2

Question 1

1 Five athletes P, Q, R, S and T compete in a race. The table shows the finishing times for the athletes. athlete P Q R S T finishing time / s 22.50 24.40 25.20 26.50 23.20 Which statement is correct? A Athlete P won the race and was 0.70 s ahead of the athlete in second place. B Athlete P won the race and was 1.90 s ahead of the athlete in second place. C Athlete S won the race and was 1.30 s ahead of the athlete in second place. D Athlete S won the race and was 2.10 s ahead of the athlete in second place.

Accepted Answer

A

Question 2

2 A student investigates the motion of a ball rolling down a slope. The diagram shows the speed v of the ball at different times t. t = 0 s v = 0 cm / s t = 0.2 s v = 2.8 cm / s t = 0.4 s ball v = 5.1 cm / s t = 0.6 s v = 7.0 cm / s Which statement describes the motion of the ball? A The acceleration is not constant. B The acceleration is negative. C The speed is decreasing. D The velocity is constant.

Accepted Answer

A

Question 3

3 Which statement about acceleration is correct? A It is related to the changing speed of an object. B It is the distance an object travels in one second. C It is the force acting on an object divided by the distance it travels in one second. D It is the force acting on an object when it is near to the Earth.

Accepted Answer

A

Question 4

4 Which statement correctly describes the effects of placing a heavy load in a car? A It is easier to accelerate the car and easier to bring the car to rest. B It is easier to accelerate the car but more difficult to bring the car to rest. C It is more difficult to accelerate the car and more difficult to bring the car to rest. D It is more difficult to accelerate the car but easier to bring the car to rest.

Accepted Answer

C

Question 5

5 A space probe is taken from the Earth to Mars. The force of gravity on the surface of Mars is less than the force of gravity on the surface of the Earth. How do the weight and the mass of a space probe on the surface of Mars compare to their values when the probe is on the surface of the Earth? weight on Mars mass on Mars A decreased decreased B decreased unchanged C unchanged decreased D unchanged unchanged

Accepted Answer

B

Question 6

6 Water has a density of 1000 kg / m3. A rectangular swimming pool has an average depth of 1.6 m. The length of the pool is 25 m. The width of the pool is 10 m. What is the mass of the water in the swimming pool? A 2.5 kg B 400 kg C 400 000 kg D 800 000 kg

Accepted Answer

C

Question 7

7 A satellite orbits the Earth at constant speed in a circular orbit. Which statement is correct? A The resultant force on the satellite is zero. B The resultant force on the satellite is towards the Earth. C The resultant force on the satellite is away from the Earth. D The resultant force on the satellite is in the direction of motion.

Accepted Answer

B

Question 8

8 Two forces P and Q act on an object. Which diagram shows the resultant of these two forces? A B C D resultant resultant P P P P resultant resultant Q Q Q Q

Accepted Answer

C

Question 9

9 An object is moving at +3.0 m / s. A force acts on the object. After a time, the object is moving at – 4.0 m / s. The mass of the object is 5.0 kg. What is the change in momentum of the body? A –35 kg m / s B –5.0 kg m / s C +5.0 kg m / s D +35 kg m / s

Accepted Answer

A

Question 10

10 Which energy resource is not renewable? A geothermal B nuclear fission C solar D wind

Accepted Answer

B

Question 11

11 A car of mass 500 kg is moving at 10 m / s. The engine does work on the car and the speed increases to 16 m / s. How much work is done by the engine to increase the speed of the car? A 3000 J B 9000 J C 39 000 J D 78 000 J

Accepted Answer

C

Question 12

12 The diagram shows a solid block resting on a bench. The dimensions of the block are shown. 40 cm 20 cm Q R bench 80 cm P On which labelled surface should the block rest to produce the smallest pressure on the bench? A P B Q C R D P, Q and R produce the same pressure

Accepted Answer

A

Question 13

13 An object is 60 cm below the surface of a liquid. The pressure due to the liquid at this depth is 9000 Pa. What is the density of the liquid? A 15 kg / m3 B 540 kg / m3 C 1500 kg / m3 D 54 000 kg / m3

Accepted Answer

C

Question 14

14 Which row describes the forces between the molecules and the motion of the molecules in a solid? forces between motion molecules of molecules A strong move freely B strong vibrate only C weak move freely D weak vibrate only

Accepted Answer

B

Question 15

15 Wet clothes are hanging outside to dry. Which condition decreases the rate of evaporation of the water from the clothes? A folded clothes B higher temperature C wetter clothes D windy day

Accepted Answer

A

Question 16

16 The diagram shows a liquid-in-glass thermometer. glass bulb stem capillary tube –10 0 10 20 30 40 50 60 70 80 90 100 liquid The design of this thermometer includes the following features. 1 a liquid which expands linearly when it is heated 2 a glass bulb which has a thick glass wall 3 a capillary tube with a very small diameter Which features increase the sensitivity of the thermometer? A 1 only B 1 and 2 C 2 and 3 D 3 only

Accepted Answer

D

Question 17

17 The diagrams show four blocks of steel. The blocks are all drawn to the same scale. The same quantity of thermal energy is given to each block. Which block shows the greatest rise in temperature? A B C D

Accepted Answer

A

Question 18

18 A room is heated by a radiator. The diagrams X and Y show two possible circulations of hot air, which heat the room. diagram X ceiling diagram Y ceiling radiator radiator floor floor Which diagram and reason explain the heating of the room by convection? diagram reason A X air density decreases when air is heated B X air density increases when air is heated C Y air density decreases when air is heated D Y air density increases when air is heated

Accepted Answer

A

Question 19

19 Two copper containers P and Q are filled with hot water. The diagrams are both drawn to the same scale. P Q Container P emits more infrared radiation from its surfaces than container Q. What is a possible reason for this? A The surfaces of P are painted white and the surfaces of Q are painted black. B The surfaces of P are shiny and the surfaces of Q are dull. C The surfaces of P have a smaller area than the surfaces of Q. D The water in P is hotter than the water in Q.

Accepted Answer

D

Question 20

20 The diagram shows a wave. 8 cm 3 cm 6 cm 4 cm What are the amplitude and the wavelength of this wave? amplitude / cm wavelength / cm A 3 4 B 3 8 C 6 4 D 6 8

Accepted Answer

B

Question 21

21 The frequency of the microwaves used in a microwave oven is 2400 MHz. What is the wavelength of these microwaves? A 0.125 m B 8.00 m C 125 m D 7200 m

Accepted Answer

A

Question 22

22 An object O is placed in front of a plane mirror as shown. O plane mirror 1 2 Which row is correct? position of nature of the image the image A 1 real B 1 virtual C 2 real D 2 virtual

Accepted Answer

B

Question 23

23 Which statement is correct? A The speed of light in glass is equal to the speed of light in a vacuum multiplied by the refractive index of glass. B The incident angle of a light ray at an air-glass surface is the angle between the ray and the glass surface. C The sine of the critical angle at an air-glass surface is equal to 1 . refractive index of glass D The angle of refraction for light passing through an air-glass surface is proportional to the angle of incidence at that surface.

Accepted Answer

C

Question 24

24 An intruder alarm sensor detects that a person is warmer than his surroundings. Which type of electromagnetic wave does the sensor detect? A infrared B radio C ultraviolet D visible light

Accepted Answer

A

Question 25

25 A dolphin sends out a sound wave. An echo returns 0.010 s later from a fish which is 7.5 m from the dolphin. What is the speed of the sound wave in water? A 0.075 m / s B 0.15 m / s C 750 m / s D 1500 m / s

Accepted Answer

D

Question 26

26 Four nails A, B, C and D are tested to find which makes the strongest permanent magnet. One of the nails is placed against a bar magnet and the number of paper clips which the nail can support is recorded. nail N S bar magnet paper clips The bar magnet is then removed and the number of paper clips remaining attached to the nail is recorded. Each nail is tested individually. Which nail becomes the strongest permanent magnet? number of paper clips attached to the nail bar magnet present bar magnet removed A 2 0 B 2 1 C 4 3 D 5 2

Accepted Answer

C

Question 27

27 A student wants to demagnetise a steel bar. He uses the apparatus shown. He switches on the circuit for a few seconds and then switches off. He finds that the steel bar is still magnetised. steel bar coil a.c. supply What should he do to improve his method? A change the supply from an alternating to a direct voltage B use a lower alternating voltage C remove the steel bar from the coil whilst the circuit is switched on D use a coil that has fewer turns on it

Accepted Answer

C

Question 28

28 A cloth is used to rub an uncharged plastic rod. Both the rod and the cloth become charged. Why does the plastic rod become negatively charged and the cloth become positively charged? A The rod gains electrons and the cloth gains positive charges. B The rod gains electrons and the cloth loses electrons. C The rod loses electrons and the cloth gains electrons. D The rod loses electrons and the cloth loses positive charges.

Accepted Answer

B

Question 29

29 A student uses the circuit shown to determine the resistance of two identical resistors. A V The voltmeter reading is 2.2 V and the ammeter reading is 0.25 A. What is the resistance of each resistor? A 0.275 Ω B 0.55 Ω C 4.4 Ω D 8.8 Ω

Accepted Answer

C

Question 30

30 A cell passes a current of 2.0 A in a circuit for 30 s. In this time the cell transfers 120 J of energy. What is the electromotive force (e.m.f.) of the cell? A 0.50 V B 1.5 V C 2.0 V D 8.0 V

Accepted Answer

C

Question 31

31 The circuit shown contains five lamps J, K, L, M and N. All the lamps are glowing. lamp L lamp K lamp J lamp N lamp M One lamp is removed and two other lamps go out. Which lamp is removed? A lamp J B lamp K C lamp L D lamp M

Accepted Answer

A

Question 32

32 What is the effective resistance of the following combination of resistors? 6.0 Ω 4.0 Ω 8.0 Ω A 1.8 Ω B 7.4 Ω C 11 Ω D 18 Ω

Accepted Answer

B

Question 33

33 Which symbol represents a NAND gate? A B C D

Accepted Answer

B

Question 34

34 The diagram shows a circuit used to switch on a heater when the temperature drops below a certain value. X Y Which row shows the components that should be connected at X and at Y? X Y A B C D

Accepted Answer

B

Question 35

35 The diagram shows the magnetic field due to a current in a solenoid. Where is the magnetic field the strongest? A D B C

Accepted Answer

C

Question 36

36 A beam of electrons is passed through the magnetic field of a magnet. How must the magnet be positioned to deflect the beam in the direction shown? A B e– e– N S direction S of beam direction N of beam C D e– e– S N direction N of beam direction S of beam

Accepted Answer

B

Question 37

37 Uranium-235 can undergo nuclear fission in many ways. Which equation correctly shows a possible fission reaction for uranium-235? 1n 235U 141Ba 92Kr 31n A + → + + 0 92 56 36 0 1n 235U 91Sr 144Xe 21n B + → + + 0 92 38 54 0 1n 235U 95Rb 136Cs 31n C + → + + 0 92 37 55 0 1n 235U 87Br 146La 41n D + → + + 0 92 35 57 0

Accepted Answer

A

Question 38

38 A radioactive material has a half-life of 20 days. A sample of the material contains 8.0 × 1010 atoms. How many atomic nuclei have decayed after 60 days? A 1.0 × 1010 B 4.0 × 1010 C 6.0 × 1010 D 7.0 × 1010

Accepted Answer

D

Question 39

39 A thin sheet of paper is placed between a radioactive source and a radiation detector. The count rate falls to a very low reading. paper detector counter source From this result, which type of radiation is the source emitting? A α-particles B β-particles C γ-rays D X-rays

Accepted Answer

A

Question 40

40 α-particles, β-particles and γ-rays are emitted by radioactive nuclei when they decay. Which emissions can be deflected by an electric field? A α-particles and β-particles only B β-particles and γ-rays only C γ-rays and α-particles only D α-particles, β-particles and γ-rays

Accepted Answer

A

Question paper16 pages

Mark scheme3 pages

Questions as text

Q1 · Five athletes P, Q, R, S and T compete in a race

Q2 · A student investigates the motion of a ball rolling down a slope

Q3 · Which statement about acceleration is correct?

Q4 · Which statement correctly describes the effects of placing a heavy load in a car?

Q5 · A space probe is taken from the Earth to Mars

Q6 · Water has a density of 1000 kg / m3

Q7 · A satellite orbits the Earth at constant speed in a circular orbit

Q8 · Two forces P and Q act on an object

Q9 · An object is moving at +3.0 m / s

Q10 · Which energy resource is not renewable?

Q11 · A car of mass 500 kg is moving at 10 m / s

Q12 · The diagram shows a solid block resting on a bench

Q13 · An object is 60 cm below the surface of a liquid

Q14 · Which row describes the forces between the molecules and the motion of the molecules in a…

Q15 · Wet clothes are hanging outside to dry

Q16 · The diagram shows a liquid-in-glass thermometer

Q17 · The diagrams show four blocks of steel

Q18 · A room is heated by a radiator

Q19 · Two copper containers P and Q are filled with hot water

Q20 · The diagram shows a wave

Q21 · The frequency of the microwaves used in a microwave oven is 2400 MHz

Q22 · An object O is placed in front of a plane mirror as shown

Q23 · Which statement is correct?

Q24 · An intruder alarm sensor detects that a person is warmer than his surroundings

Q25 · A dolphin sends out a sound wave

Q26 · Four nails A, B, C and D are tested to find which makes the strongest permanent magnet

Q27 · A student wants to demagnetise a steel bar

Q28 · A cloth is used to rub an uncharged plastic rod

Q29 · A student uses the circuit shown to determine the resistance of two identical resistors

Q30 · A cell passes a current of 2.0 A in a circuit for 30 s

Q31 · The circuit shown contains five lamps J, K, L, M and N

Q32 · What is the effective resistance of the following combination of resistors?

Q33 · Which symbol represents a NAND gate?

Q34 · The diagram shows a circuit used to switch on a heater when the temperature drops below a…

Q35 · The diagram shows the magnetic field due to a current in a solenoid

Q36 · A beam of electrons is passed through the magnetic field of a magnet

Q37 · Uranium-235 can undergo nuclear fission in many ways

Q38 · A radioactive material has a half-life of 20 days

Q39 · A thin sheet of paper is placed between a radioactive source and a radiation detector

Q40 · Α-particles, β-particles and γ-rays are emitted by radioactive nuclei when they decay

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