0625-IGCSE PHYSICS EXTENDED THEORY PAPER...

0625-IGCSE PHYSICS

EXTENDED THEORY PAPER NO: 4

1. GENERAL PHYSICS Pg. No: 1-89

2. THERMAL PHYSICS Pg. No: 90-133

3. WAVES, LIGHT AND SOUND Pg. No: 134-154

4. RADIOACTIVITY Pg. No: 249-260

4. ELECTRICITY Pg No:155-248

GENERAL PHYSICS

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© UCLES 2008 0625/01/O/N/08

1 Two digital stopwatches X and Y, which record in minutes and seconds, are used to time a race.

The readings of the two stopwatches, at the start and at the end of the race, are shown.

start

00:00

end

start end

00:40stopwatch X

01:30 02:20stopwatch Y

Which statement about the time of the race is correct?

A Both stopwatches record the same time interval.

B Stopwatch X recorded 10 s longer than stopwatch Y.

C Stopwatch Y recorded 10 s longer than stopwatch X.

D Stopwatch Y recorded 50 s longer than stopwatch X.

2 A tennis player hits a ball over the net.

P

Q

R

In which position is the ball accelerating?

A P and Q only

B P and R only

C Q and R only

D P, Q and R

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© UCLES 2008 0625/01/O/N/08 [Turn over

3 A car travels at various speeds during a short journey.

The table shows the distances travelled and the time taken during each of four stages P, Q, R and S.

stage P Q R S

distance travelled / km 1.8 3.6 2.7 2.7

time taken / minutes 2 2 4 3

During which two stages is the car travelling at the same speed?

A P and Q B P and S C Q and R D R and S 4 What is the meaning of the weight of an object?

A the density of the material from which it is made

B the force exerted on it by gravity

C the mass of the matter it contains

D the pressure it exerts on the floor 5 The weight of an object is to be found using the beam balance shown in the diagram.

?

object

The object is put in the left-hand pan and various standard weights are put in the right-hand pan, with the following results.

weights in the right hand pan effect

0.1 N, 0.1 N, 0.05 N, 0.02 N balance tips down slightly on the left-hand side

0.2 N, 0.1 N, 0.01 N balance tips down slightly on the right-hand side

What is the best estimate of the weight of the object?

A 0.27 N B 0.29 N C 0.31 N D 0.58 N

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© UCLES 2008 0625/01/O/N/08

6 A student needs to find the density of a cubic block of wood.

Which two pieces of apparatus should she use?

A balance and metre rule

B balance and thermometer

C measuring cylinder and metre rule

D measuring cylinder and thermometer

7 Two identical measuring cylinders containing different liquids are placed on a simple balance.

They balance as shown.

liquid X

volume = 200 cm3liquid Y

volume = 100 cm3

How does the density of X compare with the density of Y?

A density of X = 2

1 × density of Y

B density of X = density of Y

C density of X = 2 × density of Y

D density of X = 4 × density of Y

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8 The diagrams show a uniform rod with its midpoint on a pivot.

Two equal forces F are applied to the rod, as shown.

Which diagram shows the rod in equilibrium?

A

F

F

pivot

B

FF

pivot

C

F Fpivot

D

F

F

pivot

9 A train is travelling along a horizontal track at constant speed. Two of the forces acting on the train are shown in the diagram.

force from engine

60 000 Nfriction

20 000 N

forwards

A force of air resistance is also acting on the train to give it a resultant force of zero.

What is this air resistance force?

A 40 000 N backwards

B 80 000 N backwards

C 40 000 N forwards

D 80 000 N forwards

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© UCLES 2008 0625/01/O/N/08

10 The diagram shows water stored behind a dam.

water

dam

turbine

generator

water

The water flows to a turbine and turns a generator.

Which sequence for the conversion of energy is correct?

A gravitational energy → kinetic energy → electrical energy

B kinetic energy → gravitational energy → electrical energy

C gravitational energy → electrical energy → kinetic energy

D kinetic energy → electrical energy → gravitational energy 11 A rubber ball is dropped from a height of 2 m on to a table.

Whilst in contact with the table, some of its energy is converted into internal energy.

What is the highest possible point the ball could reach after bouncing?

ball released

from this height

4 m

2 m

height

0

A

B

C

D

table

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12 The diagram shows a simple mercury barometer used to measure atmospheric pressure.

P

Qmercury

Which statement is correct?

A The pressure at P is atmospheric pressure.

B The pressure at P is nearly zero.

C The pressure at Q is lower than the pressure at P.

D The pressure at Q is nearly zero.

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© UCLES 2008 0625/01/O/N/08

13 A brick with rectangular sides rests on a table.

brick

table

The brick is now turned so that it rests on the table on its smallest face.

How has this change affected the force and the pressure exerted by the brick on the table?

force pressure

A unchanged unchanged

B increased unchanged

C unchanged increased

D increased increased

14 Viewed through a microscope, very small particles can be seen moving with Brownian motion.

Which line in the table is correct?

type of motion of particles

particles are suspended in

A vibration a liquid or a gas

B vibration a solid, a liquid or a gas

C random a liquid or a gas

D random a solid, a liquid or a gas

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15 The pressure of a fixed mass of gas in a cylinder is measured. The volume of the gas in the cylinder is then slowly decreased.

Which graph could show the change of pressure of the gas during this process?

pressure

time

A

00

pressure

time

B

pressure

time

C

pressure

time

D

00

00

00

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© UCLES 2015 0625/12/F/M/15

1 A student uses a measuring cylinder to measure the volume of some water. The diagram shows part of the measuring cylinder. The top and bottom of the meniscus are labelled.

50

45

40

top of

meniscus

bottom

of meniscus

cm3

What is the volume of the water?

A 47.0 cm3 B 47.5 cm3 C 49.0 cm3 D 49.5 cm3

2 The graph represents the motion of a train travelling between two stations.

00

100 200 300 400 500

20

10

600 700 800 900

speed

m / s

time / s

Which statement about the train is correct?

A Its acceleration takes a longer time than its deceleration.

B It travels at constant speed for less than half of its journey time.

C It travels 2000 m in the first 100 s.

D It travels 10 000 m at constant speed.

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SAMPLE MATERIAL

ONLY!!!!FURTHERPREVIEW

NOT AVAILABLE

FOR THIS TOPIC

THERMAL PHYSICS

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18 A cup with a lid contains a hot drink.

lid

hot drink

When the lid is removed, the rate of heat loss from the drink increases.

What causes this?

A convection only

B evaporation only

C both convection and evaporation

D neither convection nor evaporation

19 A cupboard is placed in front of a heater. Air can move through a gap under the cupboard.

wall

floor

heatercupboard

air moves through gap

Which line in the table describes the temperature and the direction of the air that moves through the gap?

air temperature air direction

A cool away from the heater

B cool towards the heater

C warm away from the heater

D warm towards the heater

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© UCLES 2009 0625/12/O/N/09

12 A water manometer is used to measure the pressure of a gas supply to a house. It gives a reading of h cm of water.

gassupply

h cm

Why is it better to use water rather than mercury in this manometer?

A h would be too large if mercury were used.

B h would be too small if mercury were used.

C The tube would need to be narrower if mercury were used.

D The tube would need to be wider if mercury were used.

13 To mark a temperature scale on a thermometer, standard temperatures known as fixed points are needed.

Which of these is a fixed point?

A room temperature

B the temperature inside a freezer

C the temperature of pure melting ice

D the temperature of pure warm water

14 The table gives the melting points and boiling points of glycerine and benzene.

melting point boiling point

glycerine 18 °C 290 °C

benzene 5.4 °C 80 °C

At which temperature will both glycerine and benzene be liquid?

A 0 °C B 50 °C C 100 °C D 150 °C

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arted

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SAMPLE MATERIAL


NOT AVAILABLE

FOR THIS TOPIC

PROPERTIESOF

WAVELIGHT

ANDSOUND

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© UCLES 2008 0625/01/O/N/08

20 Waves in a tank pass from shallow to deep water.

The wavefront diagram is shown.

shallow

water

deep

water

wavefront

Which quantity increases as the waves enter the deep water?

A amplitude

B frequency

C wave energy

D wavelength

21 The diagrams represent water waves in a tank.

Which diagram represents waves that change speed?

D

deeper

water

shallower

water

A

barrierB

barrierC

barrier

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22 Which diagram shows the dispersion of white light?

A B

white

light

white

light

C D

white

light

white

light

glass

glass

glass

glass

23 In the diagram, the distance OP is the focal length of the lens.

Through which point will the ray shown pass, after refraction by the lens?

O P B

C

A

D

focal lengthfocal length

lens

24 Which word correctly completes the sentence below?

An echo is a sound wave which is ………… by a large obstacle.

A absorbed

B dispersed

C reflected

D refracted

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© UCLES 2008 0625/01/O/N/08

25 In an experiment to measure the speed of sound, a student uses a stopwatch to find how long a sound takes to travel from X to Y. She does this six times.

sound travels from X to Y

X Y

The table shows her results.

time / s

first 0.5

second 0.7

third 0.6

fourth 0.4

fifth 0.9

sixth 0.5

What value for the time should be used to calculate the speed of sound?

A 0.4 s B 0.5 s C 0.6 s D 0.9 s

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© UCLES 2009 0625/12/O/N/09

19 Which range of frequencies typically can be heard by a 10 year-old child?

A 20 Hz – 2000 Hz

B 20 Hz – 20 000 Hz

C 200 Hz – 2000 Hz

D 200 Hz – 20 000 Hz

20 Astronaut 1 uses a hammer to mend a satellite in space. Astronaut 2 is nearby. There is no air in space.

astronaut 1 astronaut 2hammer

Compared with the sound heard if they were working on Earth, what does astronaut 2 hear?

A a louder sound

B a quieter sound

C a sound of the same loudness

D no sound at all

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www.smar

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NOT AVAILABLE

FOR THIS TOPIC

ELECTRICITY AND

MAGNETISM

156

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© UCLES 2008 0625/01/M/J/08

27 Which line in the table shows whether iron and steel are ferrous or non-ferrous materials?

iron steel

A ferrous ferrous

B ferrous non-ferrous

C non-ferrous ferrous

D non-ferrous non-ferrous

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© UCLES 2008 0625/01/M/J/08 [Turn over

28 A solenoid carrying a current is used to demagnetise a bar magnet.

power

supply

solenoid

bar magnet

Which conditions achieve demagnetisation?

current through solenoid

movement of bar magnet

A a.c. around the solenoid quickly

B a.c. through the solenoid slowly

C d.c. around the solenoid quickly

D d.c. through the solenoid slowly

29 A polythene rod repels an inflated balloon hanging from a nylon thread.

What charges must the rod and the balloon carry?

A The rod and the balloon carry opposite charges.

B The rod and the balloon carry like charges.

C The rod is charged but the balloon is not.

D The balloon is charged but the rod is not.

30 Which circuit symbol represents a component used to store energy?

A B C D

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© UCLES 2008 0625/01/M/J/08

31 In the circuit shown, the switches S1 and S2 may be open (off) or closed (on).

V

12 V+

–S1

S2

switches shown

open (off)

Which line in the table shows the voltmeter reading for the switch positions given?

S1 S2 voltmeter reading / V

A open open 12

B closed closed 12

C open closed 0

D closed open 12

32 The device X in this circuit is designed to cut off the electricity supply automatically if too much current flows.

X

What is device X?

A a fuse

B a switch

C a resistor

D an ammeter

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33 The diagrams show two ways in which three lamps may be connected.

circuit 1 circuit 2

X

Y

ZX Y Z

Which statement is correct?

A If lamp Y breaks in circuit 1, both the other lamps will go out.

B If lamp Y breaks in circuit 2, both the other lamps will go out.

C If lamp Y breaks in circuit 1, lamp Z will go out, but lamp X will remain on.

D If lamp Y breaks in circuit 2, lamp Z will go out, but lamp X will remain on.

34 The wire XY shown in the diagram is connected to a sensitive voltmeter with a centre zero. XY is then moved quickly once through the magnetic field.

N

SV

X

Y

movement

What is observed on the voltmeter?

A The needle moves briefly in one direction and then returns to the centre.

B The needle moves quickly in one direction and stays deflected.

C The needle vibrates rapidly from side to side whilst XY is moving.

D The needle stays still.

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© UCLES 2008 0625/01/M/J/08

35 The diagram shows a transformer connected to a 240 V a.c. supply.

primary coil

60 turnssecondary coil

30 turns

240 V

a.c.

soft-iron core

What is the potential difference across the secondary coil of the transformer?

A 30 V B 120 V C 240 V D 480 V

36 In order to produce a beam of cathode rays, a heated filament is placed near to an anode in an evacuated glass vessel.

evacuated glass vessel

anode

heated filament

What is the type of charge on the anode and why is this charge chosen?

charge reason

A negative to attract electrons

B negative to repel electrons

C positive to attract electrons

D positive to repel electrons

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37 Diagram 1 shows a potential divider circuit containing two 100 Ω resistors.

One of the resistors is changed to 90 Ω, as shown in diagram 2.

100 Ω

100 Ω V

diagram 1

90 Ω

100 Ω V

diagram 2

How does the reading on the voltmeter change when this is done?

A It becomes zero.

B It decreases a little.

C It increases a little.

D It stays the same.

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25 An electromagnet is used to separate magnetic metals from non-magnetic metals.

Why is steel unsuitable as the core of the electromagnet?

A It forms a permanent magnet.

B It has a high density.

C It has a high thermal capacity.

D It is a good conductor of electricity.

26 The north pole of a bar magnet is placed next to end P of an iron bar PQ, as shown. As a result, magnetic poles are induced in the iron bar.

N S

magnet

Q P

iron bar

What are the magnetic poles induced at P and at Q?

magnetic pole at P magnetic pole at Q

A north north

B north south

C south north

D south south

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SAMPLE MATERIAL


NOT AVAILABLE

FOR THIS TOPIC

RAIOACTIVITY

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38 The diagram shows an experiment to monitor the radiation from a radioactive gas. The counter readings are corrected for background radiation.

counter

000.0

radioactive gas

The table shows how the counter reading varies with time.

time / seconds 0 20 40 60 80 100 120 140 160 180

counter reading / counts per minute

140 105 82 61 44 36 27 20 15 10

What is the half-life of the gas?

A between 20 and 40 seconds

B between 40 and 60 seconds

C between 60 and 140 seconds

D between 140 and 180 seconds

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Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity.

University of Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.

© UCLES 2008 0625/01/O/N/08

39 Which material is commonly used as a lining for a box for storing radioactive samples?

A aluminium

B copper

C lead

D uranium

40 A uranium U238

92 nucleus emits an α-particle.

What are the new nucleon and proton numbers?

nucleon number proton number

A 238 88

B 236 90

C 234 92

D 234 90

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© UCLES 2009 0625/12/O/N/09

38 How many neutrons and how many protons are contained in a nucleus of U238

92?

neutrons protons

A 92 146

B 146 92

C 146 238

D 238 92

39 Which statement explains the meaning of the half-life of a radioactive substance?

A half the time taken for half the substance to decay

B half the time taken for the substance to decay completely

C the time taken for half the substance to decay

D the time taken for the substance to decay completely 40 The diagram shows the paths of three different types of radiation, X, Y and Z.

X

Y

Z

2 mm of

plastic

10 mm

of aluminium

lead

Which row in the table 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

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© UCLES 2010 0625/12/O/N/10

38 In the atomic model, an atom consists of a central mass, orbited by much smaller particles.

central

mass

orbiting

particles

What is the name of the central mass and of the orbiting particles?

central mass orbiting particles

A neutron α-particles

B neutron electrons

C nucleus α-particles

D nucleus electrons

39 S is a radioactive source emitting α-particles, β-particles and γ-rays. A detector is placed 5 cm away from S. A thin sheet of paper is placed as shown in the diagram.

S

5 cm

thin sheet of paper

detector

Which radiations can be detected?

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

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© UCLES 2010 0625/12/O/N/10

40 A radioactive element has a half-life of 70 s.

The number of emissions per second, N, of a sample of the element is measured at a certain time.

What was the number of emissions per second 70 s earlier?

A 0 B N / 2 C N D 2N

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36 A scientist needs to use a source of γ-rays as safely as possible.

Which action will not reduce the amount of radiation that reaches the scientist?

A keeping the distance between the source and the scientist as large as possible

B keeping the temperature of the source as low as possible

C keeping the time for which the scientist uses the source as small as possible

D placing a lead screen between the scientist and the source

37 A nuclide of substance X has the symbol X26

12.

How many electrons are there in a neutral atom of substance X?

A 12 B 14 C 26 D 38

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© UCLES 2011 0625/12/O/N/11

38 The graph shows the activity of a radioactive source over a period of time.

2000

1500

1000

500

0 0 1 2 3

time / hour

activity

/ counts per

second

What is the half-life of the source?

A2

1 hour B 1 hour C 12

1 hours D 3 hours

39 Cathode rays are emitted in a vacuum tube. They consist of particles that are found in atoms.

What is the name of the particles and how are the cathode rays produced?

name of particles how the cathode rays

are produced

A electrons electromagnetic induction

B electrons thermionic emission

C protons electromagnetic induction

D protons thermionic emission

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0625-IGCSE PHYSICS EXTENDED THEORY PAPER...

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