Cambridge IGCSE Physics 0625 — 2018 Oct/Nov Paper 2 · Variant 2
0625/22/O/N/18 · 40 questions · 40 marks · ≈45 min
The question paper and its mark scheme, free to read here and free to download. This is Cambridge’s own paper, exactly as it was sat.
Question paper16 pages
Mark scheme3 pages
Answers below. Sit the paper first if you are practising.
Questions as text
Q1 · The diagram shows part of a micrometer screw gauge
1 The diagram shows part of a micrometer screw gauge. 45 0 1 2 40 mm 35 30 What is the smallest reading that can be achieved using this micrometer screw gauge? A 0.0001 mm B 0.01 mm C 0.1 mm D 1 mm
Mark scheme: B
More questions on Physical quantities and measurement techniques
Q2 · The speed-time graph shows the motion of a car
2 The speed-time graph shows the motion of a car. At which time is its acceleration greatest? speed 0 0 A B C D time
Mark scheme: B
Q3 · An athlete runs at a speed of 8 m / s for 10 s, and then at a speed of 6 m / s for 12 s
3 An athlete runs at a speed of 8 m / s for 10 s, and then at a speed of 6 m / s for 12 s. Which calculation gives the average speed of the athlete in m / s? 8 + 6 A 2 (8 × 10) + (6 × 12) B 22 (8 ÷ 10) + (6 ÷ 12) C 22 (10 ÷ 8) + (12 ÷ 6) D 22
Mark scheme: B
Q4 · A helium balloon is tied to a top-pan balance
4 A helium balloon is tied to a top-pan balance. A metal block of mass 100 g is placed on the balance. The reading on the balance is 91 g. helium balloon metal block 91 g Which statement can be deduced from this experiment? A The balloon exerts a downward force of 0.09 N on the top-pan balance. B The helium has a mass of –9 g. C The helium has a mass of +9 g. D The resultant downward force on the top-pan balance is 0.91 N.
Mark scheme: D
Q5 · The diagram shows four blocks of different metals
5 The diagram shows four blocks of different metals. Each block has a mass of 12 g. Which metal has the largest density? A B 1 cm 1 cm 2 cm 1 cm 2 cm 2 cm C D 1 cm 1 cm 2 cm 1 cm 3 cm 3 cm
Mark scheme: A
Q6 · The graph shows how the length of a spring changes when the stretching force is increased
6 The graph shows how the length of a spring changes when the stretching force is increased. 30 length of 25 spring / cm 20 15 10 5 0 0 1 2 3 4 5 6 force / N In the Hooke’s law region, what is the spring constant for this spring? A 0.20 N / cm B 0.22 N / cm C 0.28 N / cm D 0.33 N / cm
Mark scheme: D
Q7 · Point X is the centre of mass of a lamina in the shape of a triangle with sides of equal…
7 Point X is the centre of mass of a lamina in the shape of a triangle with sides of equal length. The top of the triangle is cut off along the dotted line shown. X What happens to the centre of mass, X? A moves towards the bottom of the page B moves to the left C moves to the right D moves towards the top of the page
Mark scheme: A
Q8 · An object of mass 3.0 kg, travelling at a speed of 6.0 m / s, collides with an object of…
8 An object of mass 3.0 kg, travelling at a speed of 6.0 m / s, collides with an object of mass 2.0 kg, travelling in the opposite direction at a speed of 2.0 m / s. 6.0 m / s 2.0 m / s 3.0 kg 2.0 kg The objects stick together during the collision. What is the speed and direction of the combined mass after the collision? A 4.4 m / s to the left B 4.4 m / s to the right C 2.8 m / s to the left D 2.8 m / s to the right
Mark scheme: D
Q9 · Which device is designed to convert chemical energy into kinetic energy?
9 Which device is designed to convert chemical energy into kinetic energy? A an a.c. generator B a battery-powered torch C a car engine D a wind-up mechanical clock
Mark scheme: C
Q10 · The diagram shows a pendulum
10 The diagram shows a pendulum. P R 10 cm Q The pendulum swings from P to Q to R and back to P. P is 10 cm higher than Q. At which speed does the pendulum bob pass through Q? A 0.44 m / s B 1.0 m / s C 1.4 m / s D 2.0 m / s
Mark scheme: C
Q11 · A crane on a building site lifts bricks of total mass 200 kg, initially at rest on the…
11 A crane on a building site lifts bricks of total mass 200 kg, initially at rest on the ground, with uniform acceleration. When the bricks are 5.0 m from the ground, they have a speed of 5.0 m / s. How much work is done during this process? A 2.5 kJ B 10.0 kJ C 12.5 kJ D 35 kJ
Mark scheme: C
Q12 · A manometer is used to measure the pressure of a gas supply
12 A manometer is used to measure the pressure of a gas supply. manometer connection to gas supply h liquid Which change gives a greater value of height h ? A using a less dense liquid B using a more dense liquid C using a narrower tube D using a wider tube
Mark scheme: A
Q13 · A washbasin has an exit pipe covered with a plug of area 12 cm2
13 A washbasin has an exit pipe covered with a plug of area 12 cm2. A chain is attached to the centre of the plug to assist in pulling the plug away from the exit hole. The washbasin contains water to a depth of 0.080 m. The density of the water is 1000 kg / m3. chain plug What is the force acting on the plug due to the water? A 0.96 N B 800 N C 9600 N D 80 000 N
Mark scheme: A
Q14 · Apparatus being used to observe smoke particles
14 Diagram 1 shows apparatus being used to observe smoke particles. Diagram 2 shows how a smoke particle moves randomly. diagram 1 diagram 2 eye random movement microscope air molecules light and smoke particles Why do the smoke particles move randomly? A They are hit by air molecules. B They are less dense than air. C They are moved by convection currents. D They gain energy from the light.
Mark scheme: A
Q15 · A closed container of gas is heated
15 A closed container of gas is heated. The pressure of the gas increases. Which statement explains this increase in pressure? A The changes in the momentum of the gas molecules striking the walls of the container increase. B The forces of attraction between the gas molecules and the walls of the container increase. C The gas molecules collide with each other more frequently. D The gas molecules lose more energy when they strike the walls of the container.
Mark scheme: A
Q16 · The metal lid on a glass jar is difficult to unscrew
16 The metal lid on a glass jar is difficult to unscrew. The jar is placed in a warm oven until the jar and the lid reach the same temperature. The lid is now easily unscrewed. Which property accounts for this? A thermal capacity of the jar B thermal capacity of the lid C thermal conduction D thermal expansion
Mark scheme: D
Q17 · A block of iron of mass M is heated and gains 10 kJ of internal energy
17 A block of iron of mass M is heated and gains 10 kJ of internal energy. The temperature of the block rises by θ °C. A second block of iron of mass 2M is heated and gains 5.0 kJ of internal energy. What is the temperature rise of the second block in °C? θ θ A B C 2θ D 4θ 4 2
Mark scheme: A
Q18 · Which factors affect the sensitivity of a thermometer?
18 Which factors affect the sensitivity of a thermometer? 1 the diameter of the bore of the tube 2 the length of the capillary tube 3 the thickness of the bulb wall A 1 only B 1 and 2 only C 1 and 3 only D 1, 2 and 3
Mark scheme: A
Q19 · Which statement about convection is not correct?
19 Which statement about convection is not correct? A It enables water in a pan on a cooker to get evenly heated. B It happens in liquids and gases. C It means that heat rises. D It occurs because the density of a fluid decreases when it is heated.
Mark scheme: C
Q20 · A lamp has a metal filament that glows when heated by an electric current
20 A lamp has a metal filament that glows when heated by an electric current. The middle of the filament is at a very high temperature. The ends of the filament, which are connected to the base of the lamp, are cooler. Which statement is correct? A Some thermal energy is conducted to the base of the lamp. B The filament radiates energy equally at all points along its length. C The lamp transfers all of the electrical energy it receives into light energy. D When the voltage across the filament is halved, the power output is halved.
Mark scheme: A
Q21 · Plane water waves travel from a shallow region into a deeper region
21 Plane water waves travel from a shallow region into a deeper region. They travel more quickly in the deeper water. shallow water boundary wave direction deep water Which diagram shows the wave pattern in the deeper water? A B C D
Mark scheme: C
Q22 · A thin converging lens has a focal length of 6.0 cm
22 A thin converging lens has a focal length of 6.0 cm. An observer looks through the lens at an object which is placed 4.0 cm from the lens. 4.0 cm eye object Which description of the image that is observed is correct? A diminished and inverted B diminished and virtual C enlarged and inverted D enlarged and virtual
Mark scheme: D
Q23 · A transmitter produces radio waves of wavelength 1500 m
23 A transmitter produces radio waves of wavelength 1500 m. It takes the waves 0.025 s to travel from the transmitter to a radio receiver. What is the distance between the radio transmitter and the receiver? A 5.0 × 103 m B 2.0 × 105 m C 7.5 × 106 m D 1.1 × 1010 m
Mark scheme: C
Q24 · Different parts of the electromagnetic spectrum are used for different purposes
24 Different parts of the electromagnetic spectrum are used for different purposes. Below are four statements about parts of the spectrum. statement 1: Infra-red waves are used in television remote controllers. statement 2: Radio waves are used to transmit television pictures from satellites to Earth. statement 3: Ultraviolet waves are used for intruder alarms. statement 4: X-rays are used for security checks. Which statements are correct? A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4
Mark scheme: B
Q25 · A sheet of ice floats on water
25 A sheet of ice floats on water. A source of sound S is positioned at the edge of the ice sheet. Four microphones are placed equal distances from S. Which microphone detects the sound from S first? A air B D S ice water C
Mark scheme: B
Q26 · The diagram shows a bar magnet at rest on a smooth horizontal surface
26 The diagram shows a bar magnet at rest on a smooth horizontal surface. A length of soft-iron wire is held parallel to the magnet. N soft-iron wire magnet S The wire is released. What happens? A The wire moves away from the magnet. B The wire moves towards the magnet. C The wire’s centre stays in its present position and the wire rotates through 90° in a clockwise direction. D The wire’s centre stays in its present position and the wire rotates through 90° in an anticlockwise direction.
Mark scheme: B
Q27 · The diagram shows point X between two charged plates
27 The diagram shows point X between two charged plates. + – + – + – + X – + – + – Which diagram shows the electric field pattern near point X? A B C D
Mark scheme: A
Q28 · A bar magnet is placed inside a current-carrying coil
28 A bar magnet is placed inside a current-carrying coil. The diagram shows four different experiments. 1 2 magnet slowly magnet slowly removed removed + – 3 4 current in coil current in coil slowly reduced slowly reduced + – In which experiments is the magnet demagnetised? A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4
Mark scheme: B
Q29 · Copper wire is available in fixed lengths but in various diameters d
29 Copper wire is available in fixed lengths but in various diameters d. Each diameter has a different resistance R. Which relationship between R and d is correct? A R is directly proportional to d. B R is directly proportional to d 2. C R is inversely proportional to d. D R is inversely proportional to d 2.
Mark scheme: D
Q30 · A student investigates the resistance of a lamp
30 A student investigates the resistance of a lamp. Which row states how the meters must be connected? ammeter voltmeter A in parallel with the lamp in parallel with the lamp B in parallel with the lamp in series with the lamp C in series with the lamp in parallel with the lamp D in series with the lamp in series with the lamp
Mark scheme: C
Q31 · The circuit shown is used to change the voltage Vout as the temperature of device X…
31 The circuit shown is used to change the voltage Vout as the temperature of device X changes. +6.0 V device Vout X 0 V Which row is correct? name of this name of type of circuit device X A potential divider fuse B potential divider thermistor C variable resistor fuse D variable resistor thermistor
Mark scheme: B
Q32 · The circuit diagram shows a d.c
32 The circuit diagram shows a d.c. power supply connected to two resistors R1 and R2 and four diodes. R1 R2 + – Which statement is correct? A There is a current in R1 and a current in R2. B There is a current in R1 but no current in R2. C There is no current in R1 but a current in R2. D There is no current in R1 and no current in R2.
Mark scheme: A
Q33 · A logic gate has inputs 0,0 and an output 1
33 A logic gate has inputs 0,0 and an output 1. Which two types of logic gate behave in this way? A OR, AND B OR, NAND C NOR, AND D NOR, NAND
Mark scheme: D
Q34 · Either a fuse or a circuit-breaker can be used to protect electrical cables from large…
34 Either a fuse or a circuit-breaker can be used to protect electrical cables from large currents that could cause overheating. X cable live electrical Y appliance supply neutral cable When a fuse is used, where should it be connected, and when a circuit-breaker is used, where should it be connected? position position of of fuse circuit-breaker A X X B X Y C Y X D Y Y
Mark scheme: A
Q35 · Electrical power is transmitted at 400 kV and transformed down to 240 V before being…
35 Electrical power is transmitted at 400 kV and transformed down to 240 V before being delivered to consumers. Which statement is correct? A A 400 kV cable requires less insulation than a 240 V cable. B Birds are subject to a high-voltage shock when resting on a high-voltage cable. C The current in the transmission wires is equal to the current delivered to the consumers. D With a 400 kV transmission system, a smaller proportion of the energy is used to heat the atmosphere than with a 240 V system.
Mark scheme: D
Q36 · The diagram shows a coil of wire between the poles of a magnet
36 The diagram shows a coil of wire between the poles of a magnet. 20 turns N S + – power supply The coil consists of 20 turns of insulated wire. The coil is connected to a variable resistor and a power supply. How can the turning effect on the coil be increased? A by moving the poles of the magnet closer to the coil B by reducing the number of turns on the coil while keeping the current constant C by increasing the resistance of the variable resistor D by reversing the terminals of the power supply
Mark scheme: A
Q37 · Which diagram represents the structure of a neutral atom?
37 Which diagram represents the structure of a neutral atom? A B C D key – – – – neutron + proton + + + + + + + + – electron – – –
Mark scheme: B
Q38 · A radioactive nucleus 220 Rn decays in two stages to produce 212 Pb
38 A radioactive nucleus 220 Rn decays in two stages to produce 212 Pb . 86 82 Which two particles are emitted in this process? A an α-particle and a β-particle B an α-particle and a proton C two α-particles D two β-particles
Mark scheme: C
Q39 · The diagram shows the paths of three different types of radiation X, Y and Z
39 The diagram shows the paths of three different types of radiation X, Y and Z. X Y Z 2 mm of 10 mm of 50 mm plastic aluminium of lead Which row correctly identifies X, Y and Z? X Y Z A α-particles β-particles γ-rays B β-particles α-particles γ-rays C β-particles γ-rays α-particles D γ-rays α-particles β-particles
Mark scheme: B
Q40 · The count rate measured when near a radioactive source drops from 542 counts per minute…
40 The count rate measured when near a radioactive source drops from 542 counts per minute to 94 counts per minute in 12 hours. The background count remains constant at 30 counts per minute. What is the half-life of the source? A 2 hours B 3 hours C 4 hours D 8 hours
Mark scheme: C
What was in this paper
The subtopics covered by these 40 questions, and how many questions each got. Open one in a new tab to see every Cambridge question on it.
4Energy, work and power3Forces3Radioactivity3Simple phenomena of magnetism3Thermal properties and temperature3Electromagnetic effects2Electromagnetic spectrum2Kinetic particle model of matter2Motion2Pressure2Transfer of thermal energy2Density1Electrical quantities1Electrical safety1General properties of waves1Light1Momentum1Physical quantities and measurement techniques1Sound1The nuclear model of the atom1What you needed in this session
Cambridge’s own grade thresholds for 2018 Oct/Nov, Paper 2 · Variant 2. A higher threshold means an easier paper — the bar moves with how the cohort did.