Cambridge IGCSE Physics

Cambridge University Press

978-1-107-61488-8 ¨C Cambridge IGCSE? Physics

David Sang

Frontmatter

More information

David Sang

Cambridge IGCSE

Physics

Workbook

Second edition

? in this web service Cambridge University Press



Cambridge University Press

978-1-107-61488-8 ¨C Cambridge IGCSE? Physics

David Sang

Frontmatter

More information

University Printing House, Cambridge cb2 8bs, United Kingdom

Cambridge University Press is part of the University of Cambridge.

It furthers the University¡¯s mission by disseminating knowledge in the pursuit of

education, learning and research at the highest international levels of excellence.



? Cambridge University Press 2014

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no reproduction of any part may take place without the written

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First published 2010

Second edition 2014

Printed in the United Kingdom by Latimer Trend

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notice to teachers

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? IGCSE is the registered trademark of Cambridge International Examinations.

The questions and example answers in this book were written by the authors.

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Cambridge University Press

978-1-107-61488-8 ¨C Cambridge IGCSE? Physics

David Sang

Frontmatter

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Contents

Introduction

v

Block 1 General physics

1

1

Making measurements

1

1.1

1.2

1.3

1.4

1.5

1

2

4

5

7

2

Describing motion

2.1

2.2

2.3

2.4

S 2.5

2.6

3

5

6

Measuring speed

Speed calculations

More speed calculations

Distance¨Ctime graphs

Acceleration

Speed¨Ctime graphs

Forces and motion

3.1

3.2

3.3

S 3.4

3.5

S 3.6

3.7

3.8

4

The SI system of units

Accurate measurements

Paper measurements

Density data

Testing your body clock

Identifying forces

The effects of forces

Combining forces

Force, mass and acceleration

Mass and weight

Falling

Vector quantities

Momentum calculations

9

11

12

14

17

18

20

20

22

23

24

26

27

28

30

Turning effects of forces

33

4.1

4.2

4.3

4.4

33

34

36

37

Turning effect of a force

Calculating moments

Stability and centre of mass

Make a mobile

Forces and matter

38

5.1 Stretching a spring

5.2 Stretching rubber

5.3 Pressure

38

41

42

Energy transformations and energy transfers

45

6.1 Recognising forms of energy

S 6.2 Energy efficiency

6.3 Energy calculations

7

9

Energy resources

7.1 Renewables and non-renewables

7.2 Wind energy

S 7.3 Energy from the Sun

45

47

49

52

52

54

56

8 Work and power

S

8.1

8.2

8.3

8.4

57

Forces doing work, transferring energy

Calculating work done

Measuring work done

Power

57

59

61

62

Block 2 Thermal physics

63

9 The kinetic model of matter

9.1

9.2

9.3

9.4

S 9.5

63

Changes of state

The kinetic model of matter

Brownian motion

Understanding gases

Boyle¡¯s law

63

65

66

67

68

10 Thermal properties of matter

10.1

10.2

10.3

10.4

S 10.5

70

Calibrating a thermometer

Energy and temperature

Demonstrating thermal expansion

Thermal expansion

Heat calculations

70

72

73

74

76

11 Thermal (heat) energy transfers

11.1

11.2

11.3

11.4

11.5

79

Conductors of heat

Convection currents

Radiation

Losing heat

Warming up, cooling down

79

81

82

84

85

Block 3 Physics of waves

87

12 Sound

87

12.1 Sound on the move

12.2 Sound as a wave

87

90

13 Light

13.1

13.2

S 13.3

13.4

13.5

92

On reflection

Refraction of light

The changing speed of light

A perfect mirror

Image in a lens

93

94

95

96

97

14 Properties of waves

99

14.1 Describing waves

S 14.2 The speed of waves

14.3 Wave phenomena

99

101

102

15 Spectra

104

15.1 Electromagnetic waves

15.2 Using electromagnetic radiation

104

105

Contents

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Cambridge University Press

978-1-107-61488-8 ¨C Cambridge IGCSE? Physics

David Sang

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Block 4 Electricity and

magnetism

16 Magnetism

16.1 Attraction and repulsion

16.2 Make a magnet

16.3 Magnetic fields

17 Static electricity

S

17.1 Attraction and repulsion

17.2 Moving charges

17.3 Static at home

18 Electrical quantities

18.1

18.2

18.3

S 18.4

18.5

S

Current in a circuit

Current and charge

Electrical resistance

Current¨Cvoltage characteristics

Electrical energy and power

19 Electric circuits

19.1

19.2

19.3

S 19.4

19.5

19.6

19.7

S

iv

Circuit components and their symbols

Diodes

Resistor combinations

More resistor combinations

Light sensor

Logic gates

Electrical safety

20 Electromagnetic forces

107

107

107

109

110

S

20.1 Using electromagnetism

20.2 Electron deflection

138

21.1 Electricity generation

21.2 Transformers

138

139

Block 5 Atomic physics

111

113

114

22 The nuclear atom

S

115

124

134

136

21 Electromagnetic induction

111

116

117

118

120

122

134

22.1 Discovering the structure of the atom

22.2 The structure of the atom

22.3 Isotopes

23 Radioactivity

23.1

23.2

23.3

S 23.4

S

The nature of radiation

Radioactive decay equations

Radioactive decay

Using radioactive substances

142

142

142

144

145

147

148

149

150

153

124

126

126

128

130

131

133

Contents

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Cambridge University Press

978-1-107-61488-8 ¨C Cambridge IGCSE? Physics

David Sang

Frontmatter

More information

Introduction

This book has been written to help you increase your understanding of the topics covered in your

IGCSE Physics course. The exercises will give you opportunities for the following:

¡ñ

¡ñ

¡ñ

¡ñ

practice in writing about the ideas that you are studying

practice in solving numerical and other problems

practice in thinking critically about experimental techniques and data

practice in drawing and interpreting diagrams, including graphs.

Most of the exercises are somewhat different from examination questions. This is because they are

designed to help you develop your knowledge, skills and understanding. (Examination questions are

designed differently, to test what you know, understand and can do.)

Spaces have been left for you to write your answers. Some of the diagrams are incomplete, and your

task will be to complete them.

Safety

A few practical exercises have been included. These could be carried out at home using simple materials

that you are likely to have available to you. (There are many more practical activities on the CD-ROM

that accompanies your textbook.)

While carrying out such experiments, it is your responsibility to think about your own safety, and

the safety of others. If you work sensibly and assess any risks before starting, you should come to no

harm. If you are in doubt, discuss what you are going to do with your teacher before you start.

Introduction

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