Physics 0625/11 May/June 2019: question paper and mark scheme

Question

A digital stop-clock measures time in minutes and seconds. The stop-clock reads 00:50 when it is started (i.e. 00 minutes 50 seconds). It reads 02:10 when it is stopped. What is the shortest possible time that has elapsed between starting and stopping the stop-clock? A 1 minute 20 seconds B 2 minutes 00 seconds C 2 minutes 10 seconds D 3 minutes 00 seconds

Question

A long-distance runner wishes to calculate her average speed for a race. Which calculation should she use? A average speed = total distance total time B average speed = total distance × total time C average speed = total time total distance D average speed = total distance + total time

Question

A heavy metal ball falls vertically downwards through air past four equally spaced levels J, K, L and M. metal ball level J level K level L level M The times taken to fall from one level to the next are measured. Where is the speed of the ball greatest and which time is shortest? speed is time is greatest between shortest between A J and K J and K B J and K L and M C L and M J and K D L and M L and M

Question

An arrow travels horizontally in a straight line at constant speed. In which direction does the weight act? C direction of motion B D A ground

Question

Two rectangular blocks consist of different materials. Four different methods are suggested to compare the two masses. 1 Compare the accelerations with which they fall freely. 2 Compare the values of their lengths × breadths × heights. 3 Hang each in turn from the same spring. Compare the extensions. 4 Place one in the right-hand pan of a beam balance and the other in the left-hand pan. Which methods give a comparison of the two masses? A 1, 2 and 3 B 1 and 2 only C 3 and 4 only D 4 only

Question

The diagrams show four solid blocks with their dimensions and masses. Which block has the greatest density? A area = 10 cm2 B area = 20 cm2 2.0 cm 2.0 cm mass = 14 g mass = 48 g C area = 10 cm2 D area = 20 cm2 2.0 cm 2.0 cm mass = 54 g mass = 68 g

Question

A mass of 20 kg is held stationary by a rope passing over a frictionless pulley. pulley T 20 kg What is the tension T in the rope? A 10 kg B 20 kg C 100 N D 200 N

Question

A spring is suspended from a stand. Loads are added and the extensions are measured. spring stand loads rule Which graph shows the result of plotting extension against load? A B extension extension 0 0 0 load 0 load C D extension extension 0 0 0 load 0 load

Question

A wooden bar is pivoted at its centre so that it can rotate freely. Two equal forces F are applied to the bar. In which diagram is the turning effect greatest? A B pivot pivot F F F F C D F pivot pivot F F F

Question

A machine is very efficient. What does this mean? A It produces a large amount of power. B It uses very little energy. C It wastes very little energy. D It works very quickly.

Question

An object is lifted vertically by a motor. In which example is the power produced the greatest? A lifting it a shorter distance in a longer time B lifting it the same distance in a longer time C lifting it a shorter distance in the same time D lifting it the same distance in a shorter time

Question

Four identical submarines P, Q, R and S are lowered from one depth to another in water of a constant density. The initial and final depths of each submarine are shown in the diagram. water surface submarine submarine P R 10 m submarine S 30 m submarine Q 50 m 70 m Which row is correct for the difference in pressure from the initial to final depth of each submarine? least change greatest change in pressure in pressure A submarines P and Q submarines R and S B submarines P and Q submarine R only C submarine P only submarines R and S D submarine P only submarine R only

Question

The diagram shows a stone suspended on a string under the surface of a liquid. The stone experiences a pressure caused by the liquid. string stone liquid What would increase the pressure on the stone? A decreasing the surface area of the stone B increasing the mass of the stone C lowering the stone deeper into the liquid D using a liquid with a lower density

Question

Why can a gas be compressed easily into a smaller volume? A The molecules are far apart. B The molecules do not attract each other. C The molecules move randomly. D The volume of each molecule can be reduced.

Question

When a liquid evaporates, some molecules escape. The temperature of the remaining liquid changes. What is the effect on the temperature and from where do the molecules escape? temperature of liquid molecules escape from A decreases everywhere within the liquid B decreases the surface only C increases everywhere within the liquid D increases the surface only

Question

What happens when a metal block is heated? A Its breadth, height and length all increase. B Its width increases only. C Its height increases only. D Its length increases only.

Question

A night storage heater contains a large block of material that is heated electrically during the night. During the day the block cools down, releasing thermal energy into the room. Which thermal capacity and which night-time temperature increase will cause the most energy to be stored by the block? thermal capacity night-time of block temperature increase A large large B large small C small large D small small

Question

The diagram shows the changes of state P, Q, R and S that occur in solids, liquids and gases when they gain or lose thermal energy. gain thermal energy P Q solid liquid gas S R lose thermal energy What is the name of change R? A condensation B solidification C boiling D melting

Question

In which does thermal conduction not occur? A a gas B a liquid C a solid D a vacuum

Question

The metal surface of a kettle is hot. What happens to the cool air outside the kettle when it comes into contact with the hot kettle? A The density of the air decreases and the air falls. B The density of the air decreases and the air rises. C The density of the air increases and the air falls. D The density of the air increases and the air rises.

Question

Ultrasound is used in a hospital to scan a patient. Ultrasound refracts at the boundary between muscle and bone because it travels at a greater speed in bone. Which change takes place when the ultrasound travels from muscle into bone? A The frequency of the wave decreases. B The frequency of the wave increases. C The wavelength of the wave decreases. D The wavelength of the wave increases.

Question

The diagram shows a cork with a weight attached so that the cork floats upright in water. cork water surface X Y weight Transverse waves travel across the water from X to Y. In which direction do the waves make the cork move? A → ← right and left B ↑↓ up and down C → only to the right D ← only to the left

Question

An object is placed 30 cm in front of a plane mirror. Which statement describes the image of the object? A The image is the same size and 30 cm from the object. B The image is the same size and 60 cm from the object. C The image is smaller and 30 cm from the object. D The image is smaller and 60 cm from the object.

Question

The diagram shows light incident at a glass-air boundary. The angle of incidence i of the ray is greater than the critical angle. Which line shows the path of the light after it meets the boundary? C D air glass i B incident ray of light A

Question

The diagram shows radiation from a lamp passing through a prism. screen prism P red light radiation from lamp Which type of radiation is found at P? A γ-rays B infrared C ultraviolet D X-rays

Question

A pulse of sound is produced at the bottom of a boat. The sound travels through the water and is reflected from a shoal of fish. The sound reaches the boat again after 1.2 s. The speed of sound in the water is 1500 m / s. boat shoal of fish How far below the bottom of the boat is the shoal of fish? A 450 m B 900 m C 1800 m D 3600 m

Question

Which range is approximately correct for the audio frequencies that can be detected by a healthy human ear? A 2 Hz to 2000 Hz B 2 Hz to 20 000 Hz C 20 Hz to 2000 Hz D 20 Hz to 20 000 Hz

Question

Why is soft iron used for the core of an electromagnet? A Soft iron easily becomes a permanent magnet. B Soft iron is a good electrical conductor. C Soft iron is a poor thermal conductor. D Soft iron loses its magnetism when the current in the coil is switched off.

Question

An iron ball on a horizontal wooden table rolls near the north pole of a bar magnet which is lying on the table. Which diagram shows the most likely path of the ball, as seen from above the table? A B magnet S magnet S N N ball ball C D magnet S magnet S N N ball ball stops here

Question

Diagram 1 shows two thin, uncharged strips of plastic. Diagram 2 shows the same strips after they have been rubbed with a dry cloth. strips strips of plastic of plastic diagram 1 diagram 2 Which row describes the charge on the strips after rubbing, and the force between the strips after rubbing? charge on strips force between strips A opposite attraction B opposite repulsion C the same attraction D the same repulsion

Question

A voltmeter and an ammeter are used to measure the resistance of a resistor. Which diagram shows the voltmeter and the ammeter correctly connected? A B C D A V A V A V A V

Question

A student sets up four circuits. In which circuit is there a heater in series with a fuse? A B C D

Question

The diagram shows a circuit containing a d.c. power supply, a motor and a variable resistor. Three ammeters X, Y and Z show the current in different parts of the circuit. + – X A A Z A M Y The reading on X is 4.0 A. Which statement is correct? A The readings on Y and Z are both less than 4.0 A. B The readings on Y and Z are both equal to 4.0 A. C The readings on Y and Z are both greater than 4.0 A. D The reading on Z is zero.

Question

A lamp is to be connected in a circuit so that the potential difference (p.d.) across it can be varied from 0 to 6 V. Which circuit would be most suitable? A B 6V 6V C D 6V 6V

Question

An electric heater is plugged into the mains supply using a fused plug. The current in the heater is 10 A. The cable attached to the heater is rated at 15 A. The fuses available are rated at 1 A, 3 A, 5 A and 13 A. Which fuse should be used? A 1A B 3A C 5A D 13 A

Question

A bar magnet is held near a coil of wire. The coil is connected to a sensitive voltmeter. coil of wire bar magnet N V The N-pole of the magnet is moved quickly towards the coil. The voltmeter shows a reading of +10 mV. The N-pole of the magnet is then moved slowly away from the same end of the coil. The reading on the voltmeter is observed. Which voltmeter reading is possible? A –15 mV B –5 mV C 0 mV D +5 mV

Question

Four small compasses are placed around a solenoid. solenoid A current is now switched on in the solenoid. Which diagram shows possible new directions of the compass needles? A B C D

Question

Four nuclides are represented below. 6 7 6 7 3E 3G 4L 5M Which pair of nuclides are isotopes of the same element? A E and G B E and L C G and L D G and M

Question

A student measures the level of radiation emitted from a radioactive substance. He places a detector very close to the substance. He puts different absorbers between the radioactive substance and the detector. radioactive substance counter detector absorber The student’s results are shown. These results are corrected for background radiation. counter reading absorber counts per minute none 95 thin paper 52 few mm of aluminium 52 several cm of lead 12 Which types of radiation are being emitted by the substance? A α-particles and β-particles only B α-particles and γ-rays only C β-particles and γ-rays only D α-particles, β-particles and γ-rays

Question

The nuclei of the atoms in a substance are changing randomly and emitting radiation. What is happening to the substance? A It is undergoing electromagnetic induction. B It is undergoing magnetisation. C It is undergoing solidification. D It is undergoing radioactive decay.