Physics 0625/12 February/March 2020: question paper and mark scheme

Question

The diagram shows a rectangular metal sheet close to two rulers. 30 metal sheet 20 10 cm 0 0 cm 10 20 30 40 50 What is the area of the metal sheet? A 700 cm2 B 875 cm2 C 900 cm2 D 1125 cm2

Question

The graph shows how the speed of a car changes with time over part of a journey. speed 2 1 3 4 0 0 time Which section of the graph shows acceleration and which section of the graph shows deceleration? acceleration deceleration A 1 2 B 1 3 C 2 4 D 3 1

Question

A steel ball is dropped from the top floor of a building. Air resistance can be ignored. Which statement describes the motion of the ball? A The ball falls with constant acceleration. B The ball falls with constant speed. C The ball falls with decreasing speed. D The ball falls with increasing acceleration.

Question

Diagram 1 shows a piece of flexible material that contains many pockets of air. Diagram 2 shows the same piece of flexible material after it has been compressed so that its volume decreases. diagram 1 diagram 2 (before compression) (after compression) What happens to the mass and to the weight of the flexible material when it is compressed? mass weight A increases increases B increases no change C no change increases D no change no change

Question

On the Moon, the gravitational field strength g is 1.6 N / kg. An object has a mass of 2.0 kg. What is the weight of the object on the Moon? A 0N B 1.3 N C 3.2 N D 20.0 N

Question

A measuring cylinder contains 40 cm3 of water. A solid metal ball is dropped into the water and the water level rises to 56 cm3. The mass of the ball is 80 g. What is the density of the metal from which the ball is made? A 0.20 g / cm3 B 1.4 g / cm3 C 2.0 g / cm3 D 5.0 g / cm3

Question

A car travels along a horizontal road at constant speed. Three horizontal forces act on the car. The diagram shows two of these forces. direction of motion forwards air resistance force from engine 300 N 1500 N What is the size and the direction of the third horizontal force acting on the car? A 1200 N backwards B 1200 N forwards C 1800 N backwards D 1800 N forwards

Question

A force F is applied to a spanner, as shown. spanner nut F Which action increases the moment of F about the centre of the nut? A apply the force F to the end of the spanner handle B apply the force F parallel to the spanner handle C spray oil on the nut D use a shorter spanner

Question

A ball is released from rest and rolls down a track from the position shown. What is the furthest position that it is possible for the ball to reach? ball C starts B here D A

Question

Which row describes an advantage and a disadvantage of wind turbines? advantage disadvantage A no fuel needed harmful gases released B variable supply fuel needed C no harmful gases released variable supply D constant supply noisy

Question

A box of mass m and weight W is carried up some stairs of total height x and total width y. x box y On which quantities does the work done against gravity on the box depend? A m and y B W and x C W and y D x and y

Question

Diagram 1 shows a tube sealed at one end and partly immersed in mercury. The tube has a diameter d. The top of the mercury in the tube is a height h above the mercury reservoir. diagram 1 vacuum mercury h reservoir Diagram 2 shows a similar arrangement with a tube that has a diameter 2d. diagram 2 vacuum mercury x reservoir What is the relationship between h and x? A x = 2h B x=h C x= h 2 D x= h 4

Question

A skier is standing still on a flat area of snow. skis The weight of the skier is 550 N. The total area of his skis in contact with the ground is 0.015 m2. What is the pressure exerted on the ground by the skier? A 0.83 N / m2 B 8.3 N / m2 C 3700 N / m2 D 37 000 N / m2

Question

The molecules of a substance in a particular state of matter move freely with random motion. The average speed of the molecules is increasing. What is being described? A a gas being heated B a liquid evaporating C a solid being heated D a solid melting

Question

A student measures the mass of warm water in an open container over two minutes. The container is kept at a constant temperature. The results are in the table. time / minutes mass / g 0.0 33.9 0.5 30.6 1.0 27.6 1.5 24.9 2.0 22.5 Why does the mass of the water change? A The water evaporates. B The water freezes. C The water condenses. D The water boils.

Question

Which points are the fixed points of the liquid-in-glass thermometer shown? –10 0 10 20 30 40 50 60 70 80 90 100 110 °C A the beginning and end points of the column of liquid B the points marked –10 °C and 110 °C C the points marked 0 °C and 100 °C D the top and bottom points of the thermometer bulb

Question

Four different metal blocks are given the same quantity of thermal energy. Which block has the greatest thermal capacity? A B C D temperature temperature temperature temperature rise = 1 °C rise = 2 °C rise = 3 °C rise = 4 °C

Question

A solid is heated from room temperature. The graph shows how its temperature changes with time as it is heated constantly. At which time has it just become completely liquid? temperature room temperature 0 0 A B C D time

Question

Rods of the same shape and size are inserted through corks into a tank of hot water. Each rod is covered with a layer of solid wax that has a low melting point. After a period of time, some wax melts. hot water tank good thermal conductor cork bad thermal moderate thermal conductor conductor On which rod will the wax melt first? A all at the same time B good thermal conductor C bad thermal conductor D moderate thermal conductor

Question

A boy jumps into an indoor swimming pool. He notices that the water appears to get colder as he goes deeper underwater. This is due to convection. Which statement is correct? A Cold water is more dense than warm water so it sinks to the bottom of the pool. B Warm water is more dense than cold water so it rises to the surface of the pool. C The molecules in cold water have more kinetic energy than the molecules in warm water so they move to the bottom of the pool faster. D The molecules in warm water are closer together than the molecules in cold water so they rise to the surface of the pool.

Question

The diagrams show examples of wave motion. 1 2 ripple tank drum waves on water waves in air 3 4 waves on a rope waves in a spring Which waves are longitudinal? A 1 only B 2 and 3 only C 2, 3 and 4 D 2 and 4 only

Question

Waves on the surface of water travel from deep to shallow water. Which diagram shows the correct path of the waves in the shallow water? A B deep shallow deep shallow water water water water C D shallow shallow deep water deep water water water

Question

Which diagram shows how the light from a candle is reflected by a mirror, and shows the position of the image formed? A B image of image of candle candle candle candle eye eye mirror mirror C D candle candle image of candle eye image of eye candle mirror mirror

Question

The diagram shows an image being formed by a converging lens. object 2F F F 2F image Which description of the image formed is correct? A enlarged and inverted B enlarged and upright C diminished and inverted D diminished and upright

Question

The horn on a ship makes a sound. The captain on the ship hears an echo from a cliff 4.0 s later. The speed of sound is 340 m / s. How far away is the cliff from the ship? A 170 m B 340 m C 680 m D 1360 m

Question

Bats produce ultrasound waves to navigate. What is a possible frequency range for these waves? A 0–20 Hz B 20 Hz–2000 Hz C 2 kHz–20 kHz D 20 kHz–120 kHz

Question

The table shows the forces that exist between magnetic poles. Which row is correct? N pole and N pole N pole and S pole A attraction attraction B attraction repulsion C repulsion attraction D repulsion repulsion

Question

The diagrams show three different metal rods P, Q and R, inside coils of wire. Small iron nails are placed on a wooden bench under the rods. Diagram 1 shows the situation when there are electric currents in the wires. Diagram 2 shows the situation when the currents are switched off. diagram 1 P Q R current in coils wooden bench diagram 2 P Q R no current in coils wooden bench Which row correctly identifies the metal rods? P Q R A copper soft iron steel B soft iron copper steel C steel soft iron copper D copper steel soft iron

Question

A polythene rod becomes negatively charged when it is rubbed with a cloth. Which statement explains this? A The rod gains electrons. B The rod loses electrons. C The rod gains protons. D The rod loses protons.

Question

The diagram shows a reading on an ammeter. 4 6 2 8 10 0 A What is the reading? A 0.45 A B 0.50 A C 4.5 A D 5.0 A

Question

A student is to determine the resistance of resistor R. She uses a circuit including a voltmeter and an ammeter. Which circuit should be used? A B C D V A V V A R R R R A A V

Question

The diagram shows a battery connected to two resistors. Three ammeters M1, M2 and M3 are connected in the circuit. M1 A A M3 A M2 Ammeter M1 reads 1.0 A. What are the readings on M2 and on M3? reading on reading on M2 / A M3 / A A 0.0 0.0 B 0.5 0.5 C 0.5 1.0 D 1.0 1.0

Question

Lamps in a circuit are connected in parallel. What is the advantage of this? A If one lamp breaks, the others remain lit. B Less current is taken from the power supply. C The lamps use less power than if they were connected in series. D The potential difference across each lamp is less than that of the power supply.

Question

The diagram shows a relay being used to control a buzzer. relay What is the function of the circuit? A The buzzer switches off when the circuit becomes cold. B The buzzer switches off when the circuit becomes light. C The buzzer switches on when the circuit becomes cold. D The buzzer switches on when the circuit becomes light.

Question

There is a 5 A fuse in the circuit of an appliance. What is the purpose of the fuse and in which wire is it connected? wire in which purpose it is connected A breaks the circuit if the current is greater than 5 A earth B breaks the circuit if the current is greater than 5 A live C breaks the circuit if the current is less than 5 A earth D breaks the circuit if the current is less than 5 A live

Question

The diagram shows a transformer that has an output voltage of 12 V. primary coil with 1000 turns soft iron core 240 V a.c. 12 V a.c. input output secondary coil How many turns of wire are in the secondary coil? A 12 B 20 C 50 D 20 000

Question

A current-carrying conductor is placed between two magnetic poles. The current causes a force to act on the wire. force wire N S current direction Three other arrangements P, Q and R, of the wire and magnetic poles are set up as shown. P Q R N S S N S N current reversed magnetic poles current reversed and switched around magnetic poles switched around Which arrangements will cause a force in the opposite direction to that shown in the top diagram? A P, Q and R B P and Q only C P only D R only 14

Question

The symbol for a radioactive nuclide of carbon is 6 C. How many neutrons are in its nucleus? A 6 B 8 C 14 D 20

Question

A student measures the rate at which ionising radiation is emitted from a radioactive substance. He places a detector at different distances from the radioactive source. radioactive source counter detector distance d The table shows how the reading on the counter varies with distance d. The readings on the counter are corrected for background radiation. distance d / cm 0 2 4 6 counter reading / counts per minute 1250 115 0 0 Which type of ionising radiation is being emitted by the substance? A α-particles B β-particles C γ-rays D X-rays

Question

The graph shows the count rate from a radioactive source over a period of time. 2000 count rate counts / s 1500 1000 500 0 0 1 2 3 time / hours What is the half-life of the source? A 0.5 hour B 1.0 hour C 1.5 hours D 3.0 hours