SlideShare a Scribd company logo
1 of 29
Download to read offline
KS3 Physics

8J Magnets and
Electromagnets
1 of 29
20

© Boardworks Ltd 2004
2005
Contents

8J Magnets and Electromagnets
Magnetic materials
Magnetic fields
Electromagnets
Summary activities
1 of 29
20
2

© Boardworks Ltd 2004
2005
Magnetic materials
Which of the metals below are magnetic metals?

iro
n

(F
e)

co
ba
lt

ne
ag
m
1 of 29
20
3

co
pp
er
i um
s

(

g)
M

gold
(A

(C
o)

(Cu

)

u)

ni
ck
z

c (Zn)
in

silver (Ag)

lum
a

el

(N
i)

(Al)
nium
i

© Boardworks Ltd 2004
2005
Magnetic materials
A magnetic material is attracted to a magnet.
Only iron (Fe), nickel (Ni) and cobalt (Co) are magnetic.

S
N N
i

Co

Fe

Au

Mg

1 of 29
20
4

Cu

Ag

Al

Zn
© Boardworks Ltd 2004
2005
Contents

8J Magnets and Electromagnets
Magnetic materials
Magnetic fields
Electromagnets
Summary activities
1 of 29
20
5

© Boardworks Ltd 2004
2005
Forces between magnets – experiment

1 of 29
20
6

© Boardworks Ltd 2004
2005
What is a magnetic field?
The region around a magnet where it has a magnetic effect
is called its magnetic field.
When a magnetic material is placed in a magnetic field it will
experience a force.

S

N

The iron filings feel the effect of the magnetic field and
show the direction of the forces in this region.
1 of 29
20
7

© Boardworks Ltd 2004
2005
Shape of a magnetic field
What is the shape and direction of the lines of force in the
magnetic field around a bar magnet?

strongest
field
at poles

N

S

strongest
field
at poles

weakest field further
away from poles
Where is the magnetic field strongest?
1 of 29
20
8

© Boardworks Ltd 2004
2005
Viewing magnetic fields: N poles together
Bring the north poles of two bar magnets together.

S

N

N

S

What happens to the magnets?
Next, bring the two north poles as close to each other as
possible and place a piece of paper on top of the magnets.
Carefully scatter iron filings onto the paper.
Draw the pattern created by the iron filings.

1 of 29
20
9

© Boardworks Ltd 2004
2005
Magnetic field pattern: N poles together
What do you notice about the pattern of the lines of
force in the region between the two north poles?

S

1 of 20
10 of 29

N

N

S

© Boardworks Ltd 2004
2005
Viewing magnetic fields: N and S poles together
Bring the north and south poles of two bar magnets together.

S

N

S

N

What happens to the magnets?
Next, put the north and south poles close to each other,
without letting them touch, and place a piece of paper on top.
Carefully scatter iron filings onto the paper.
Draw the pattern created by the iron filings.

1 of 20
11 of 29

© Boardworks Ltd 2004
2005
Magnetic field pattern: N and S poles together
What do you notice about the pattern of the lines of
force in the region between the north and south poles?

S

N

S

N

How does this pattern compare with the pattern between
the two north poles?
1 of 20
12 of 29

© Boardworks Ltd 2004
2005
Magnetic fields – summary
1. When two like poles (e.g. two north poles or two south
poles) are put together, they repel each other.

2. When two unlike poles (e.g. a north and a south pole)
are put together, they attract each other.

3. Scattering iron filings around a bar magnets makes it
possible to see the lines of force of the magnetic field.

1 of 20
13 of 29

© Boardworks Ltd 2004
2005
Making a magnet
A magnet can be made by magnetizing a material which is
attracted to a magnet, e.g. a paper clip.
There are three methods that can be used to make a magnet:
Stroke a magnet along the paperclip from one end to the
other and then starting from the same place, repeat the
movement. The more times this is done, the more
magnetic the clip becomes.
Hold a nail in a magnetic field and hit it with a hammer.
Put a magnetic material in a strong magnetic field.

1 of 20
14 of 29

© Boardworks Ltd 2004
2005
Contents

8J Magnets and Electromagnets
Magnetic materials
Magnetic fields
Electromagnets
Summary activities
1 of 20
15 of 29

© Boardworks Ltd 2004
2005
Making an electromagnet
When electricity is passed through a coil of wire, the coil has
a magnetic field around it. This is called an electromagnet.
If the coil of wire is wrapped around a piece of iron, such as
an iron nail, the magnetic field gets stronger.

1 of 20
16 of 29

© Boardworks Ltd 2004
2005
Investigating an electromagnet
An iron core at the centre of a coil of wire, increases the
strength of an electromagnet.

Two experiments can be carried out to investigate the other
factors that can affect the strength of an electromagnet:

1. Investigate how the number of coils affects the
number of paper clips attracted to an electromagnet
– keep the current the same in this experiment.

2. Investigate how the size of the current affects the
number of paper clips attracted to an electromagnet
– keep the number of coils the same in this experiment.
1 of 20
17 of 29

© Boardworks Ltd 2004
2005
Investigating an electromagnet – results 1
Number of coils

Number of paper
clips attracted

0

0

20

8

40

18

60

31

80

46

Remember – keep the current the same
throughout this experiment!
1 of 20
18 of 29

© Boardworks Ltd 2004
2005
Investigating an electromagnet – results 2

Current (A)

Number of paper
clips attracted

0

0

1

12

2

23

3

38

4

49

5

60

Remember – keep the number of coils the same
throughout this experiment!
1 of 20
19 of 29

© Boardworks Ltd 2004
2005
Investigating an electromagnet – graph 1
Graph to show how the number of coils affects
the strength of an electromagnet
number of clips attracted

50
40
30
20
10
0
0

1 of 20
20 of 29

20

40
60
number of coils

80

100

© Boardworks Ltd 2004
2005
Investigating an electromagnet – graph 2

number of clips attracted

70

Graph to show how the current affects the
strength of an electromagnet

60
50
40
30
20
10
0
0

1 of 20
21 of 29

1

2

3

current (A)

4

5

© Boardworks Ltd 2004
2005
Using electromagnets – scrap yards
A large electromagnet is used in a scrap yard to pick up
and move heavy pieces of scrap metal.
What metals would the
electromagnet attract?
What advantages does
an electromagnet have
over a permanent
magnet?

1 of 20
22 of 29

© Boardworks Ltd 2004
2005
Using electromagnets – door bells
The circuit for a door bells includes an electromagnet.

1 of 20
23 of 29

© Boardworks Ltd 2004
2005
Using electromagnets – relay
Lifts, cars and other large electrical machines use high
currents.
A relay, which includes an electromagnet, is used to allow
a small current in one circuit to control a large current in
another circuit.

1 of 20
24 of 29

© Boardworks Ltd 2004
2005
Electromagnets – summary
1. When electricity is passed through a coil of wire, the coil
behaves like a magnet and has a magnetic field around it
– this is an electromagnet.

2. There are three ways to make an electromagnet stronger:
 wrap the coil of wire around an iron core;
 increase the number of coils;
 increase the size of the current.

3. An electromagnet can be easily turned on and off.
This is why electromagnets can be used in
scrapyards and as switches in electrical devices.

1 of 20
25 of 29

© Boardworks Ltd 2004
2005
Contents

8J Magnets and Electromagnets
Magnetic materials
Magnetic fields
Electromagnets
Summary activities
1 of 20
26 of 29

© Boardworks Ltd 2004
2005
Glossary
attraction – The force that pulls things together,

e.g. opposite poles of two magnets.
electromagnet – A magnet made by passing electricity
through a coil of wire, which often has a core inside.
magnet – An object that has a magnetic field and can
attract magnetic materials.
magnetic field – The area around a magnet where its
magnetic force can be felt.
magnetic materials – Materials that are attracted to a
magnet, e.g. iron, cobalt and nickel.
magnetism – The non-contact force of a magnetic field.
poles – The parts of a magnet where its magnetic field is
strongest.
repulsion – The force that pushes things away from each
other, e.g. similar poles of two magnets.
1 of 20
27 of 29

© Boardworks Ltd 2004
2005
Anagrams

1 of 20
28 of 29

© Boardworks Ltd 2004
2005
Multiple-choice quiz

1 of 20
29 of 29

© Boardworks Ltd 2004
2005

More Related Content

What's hot

9.10.3 pressure
9.10.3 pressure9.10.3 pressure
9.10.3 pressureReem Bakr
 
8 d ecological relationships (boardworks)
8 d ecological relationships (boardworks)8 d ecological relationships (boardworks)
8 d ecological relationships (boardworks)Preeti Ghosh
 
7 k forces and their effects (boardworks)
7 k forces and their effects (boardworks)7 k forces and their effects (boardworks)
7 k forces and their effects (boardworks)cartlidge
 
7 l the solar system & beyond (boardworks)
7 l the solar system & beyond (boardworks)7 l the solar system & beyond (boardworks)
7 l the solar system & beyond (boardworks)cartlidge
 
Ch.16.magnets and electromagnets
Ch.16.magnets and electromagnetsCh.16.magnets and electromagnets
Ch.16.magnets and electromagnetsReem Bakr
 
7 i energy resources (boardworks)
7 i energy resources (boardworks)7 i energy resources (boardworks)
7 i energy resources (boardworks)cartlidge
 
Acids and Alkalis
Acids and Alkalis Acids and Alkalis
Acids and Alkalis Baraa Khaled
 
Turning Effect of Forces
Turning Effect of ForcesTurning Effect of Forces
Turning Effect of Forcesmeenng
 
9 k speeding up (boardworks)
9 k speeding up (boardworks)9 k speeding up (boardworks)
9 k speeding up (boardworks)cartlidge
 
Density Ppt
Density PptDensity Ppt
Density Pptshas595
 
IGCSE Pysics Momentum
IGCSE Pysics MomentumIGCSE Pysics Momentum
IGCSE Pysics MomentumJen Soriano
 
Week 7 10 turning effects
Week 7 10 turning effectsWeek 7 10 turning effects
Week 7 10 turning effectsReem Bakr
 
Chemical Reaction - Science (Grade - 9)
Chemical Reaction - Science (Grade - 9)Chemical Reaction - Science (Grade - 9)
Chemical Reaction - Science (Grade - 9)YEP Nepal
 
8 a food & digestion (boardworks)
8 a food & digestion (boardworks)8 a food & digestion (boardworks)
8 a food & digestion (boardworks)Preeti Ghosh
 
Igcse 16-astronomy
Igcse 16-astronomyIgcse 16-astronomy
Igcse 16-astronomyBhavana Binu
 
IGCSE PHYSICS CORE: ATOMIC PHYSICS
IGCSE PHYSICS CORE: ATOMIC PHYSICSIGCSE PHYSICS CORE: ATOMIC PHYSICS
IGCSE PHYSICS CORE: ATOMIC PHYSICSRozzie Jhana CamQue
 
Chemical reaction between metals and water/acid
Chemical reaction between metals and water/acidChemical reaction between metals and water/acid
Chemical reaction between metals and water/acidJacques Zeefenbergen
 

What's hot (20)

9.10.3 pressure
9.10.3 pressure9.10.3 pressure
9.10.3 pressure
 
8 d ecological relationships (boardworks)
8 d ecological relationships (boardworks)8 d ecological relationships (boardworks)
8 d ecological relationships (boardworks)
 
7 k forces and their effects (boardworks)
7 k forces and their effects (boardworks)7 k forces and their effects (boardworks)
7 k forces and their effects (boardworks)
 
7 l the solar system & beyond (boardworks)
7 l the solar system & beyond (boardworks)7 l the solar system & beyond (boardworks)
7 l the solar system & beyond (boardworks)
 
Ch.16.magnets and electromagnets
Ch.16.magnets and electromagnetsCh.16.magnets and electromagnets
Ch.16.magnets and electromagnets
 
7 i energy resources (boardworks)
7 i energy resources (boardworks)7 i energy resources (boardworks)
7 i energy resources (boardworks)
 
Acids and Alkalis
Acids and Alkalis Acids and Alkalis
Acids and Alkalis
 
Turning Effect of Forces
Turning Effect of ForcesTurning Effect of Forces
Turning Effect of Forces
 
9 k speeding up (boardworks)
9 k speeding up (boardworks)9 k speeding up (boardworks)
9 k speeding up (boardworks)
 
Density Ppt
Density PptDensity Ppt
Density Ppt
 
IGCSE Pysics Momentum
IGCSE Pysics MomentumIGCSE Pysics Momentum
IGCSE Pysics Momentum
 
Week 7 10 turning effects
Week 7 10 turning effectsWeek 7 10 turning effects
Week 7 10 turning effects
 
26. covalent bonding
26. covalent bonding26. covalent bonding
26. covalent bonding
 
Chemical Reaction - Science (Grade - 9)
Chemical Reaction - Science (Grade - 9)Chemical Reaction - Science (Grade - 9)
Chemical Reaction - Science (Grade - 9)
 
8 a food & digestion (boardworks)
8 a food & digestion (boardworks)8 a food & digestion (boardworks)
8 a food & digestion (boardworks)
 
Igcse 16-astronomy
Igcse 16-astronomyIgcse 16-astronomy
Igcse 16-astronomy
 
Waves - IGCSE physics
Waves - IGCSE physics Waves - IGCSE physics
Waves - IGCSE physics
 
IGCSE PHYSICS CORE: ATOMIC PHYSICS
IGCSE PHYSICS CORE: ATOMIC PHYSICSIGCSE PHYSICS CORE: ATOMIC PHYSICS
IGCSE PHYSICS CORE: ATOMIC PHYSICS
 
Chemical reaction between metals and water/acid
Chemical reaction between metals and water/acidChemical reaction between metals and water/acid
Chemical reaction between metals and water/acid
 
Upthrust
UpthrustUpthrust
Upthrust
 

Viewers also liked

Electromagnets Quiz
Electromagnets QuizElectromagnets Quiz
Electromagnets Quizdhmcmillan
 
Action Research Plan
Action Research PlanAction Research Plan
Action Research Planmmford1
 
Magnetism e learning Sci Phy
Magnetism e learning Sci PhyMagnetism e learning Sci Phy
Magnetism e learning Sci Phys7822143g
 
Magnets And Electromagnets Concept Map
Magnets And Electromagnets Concept MapMagnets And Electromagnets Concept Map
Magnets And Electromagnets Concept Mapdhmcmillan
 
Magnetism - For kids
Magnetism - For kidsMagnetism - For kids
Magnetism - For kidsshiamentors
 
Physics 0625 - Paper 2 version 3 - Mark scheme - May Jun 2014
Physics 0625 - Paper 2 version 3 - Mark scheme - May Jun 2014Physics 0625 - Paper 2 version 3 - Mark scheme - May Jun 2014
Physics 0625 - Paper 2 version 3 - Mark scheme - May Jun 2014JakKy Kitmanacharounpong
 
Physics 0625 - Paper 2 version 1 - Question Paper - May Jun 2014
Physics 0625 - Paper 2 version 1 - Question Paper - May Jun 2014Physics 0625 - Paper 2 version 1 - Question Paper - May Jun 2014
Physics 0625 - Paper 2 version 1 - Question Paper - May Jun 2014JakKy Kitmanacharounpong
 
Circuits
CircuitsCircuits
CircuitsOhMiss
 
Policy Report Responsible Research and Innovation for Science Teaching
Policy Report Responsible Research and Innovation for Science TeachingPolicy Report Responsible Research and Innovation for Science Teaching
Policy Report Responsible Research and Innovation for Science TeachingAlexandra Okada
 
Physics 0625 - Paper 1 version 3 - Question Paper - May Jun 2014
Physics 0625 - Paper 1 version 3 - Question Paper - May Jun 2014Physics 0625 - Paper 1 version 3 - Question Paper - May Jun 2014
Physics 0625 - Paper 1 version 3 - Question Paper - May Jun 2014JakKy Kitmanacharounpong
 
Magnetism and Electricity - ppt useful for grade 6,7 and 8
Magnetism and Electricity - ppt useful for grade 6,7 and 8Magnetism and Electricity - ppt useful for grade 6,7 and 8
Magnetism and Electricity - ppt useful for grade 6,7 and 8tanushseshadri
 

Viewers also liked (20)

Electromagnet
ElectromagnetElectromagnet
Electromagnet
 
Electromagnets Quiz
Electromagnets QuizElectromagnets Quiz
Electromagnets Quiz
 
Magnets
MagnetsMagnets
Magnets
 
Magnets
MagnetsMagnets
Magnets
 
Magnets L6
Magnets L6Magnets L6
Magnets L6
 
Action Research Plan
Action Research PlanAction Research Plan
Action Research Plan
 
6
66
6
 
Magnetism e learning Sci Phy
Magnetism e learning Sci PhyMagnetism e learning Sci Phy
Magnetism e learning Sci Phy
 
Magnets And Electromagnets Concept Map
Magnets And Electromagnets Concept MapMagnets And Electromagnets Concept Map
Magnets And Electromagnets Concept Map
 
Excretory products
Excretory productsExcretory products
Excretory products
 
Magnetism - For kids
Magnetism - For kidsMagnetism - For kids
Magnetism - For kids
 
Electric circuits
Electric circuitsElectric circuits
Electric circuits
 
Physics 0625 - Paper 2 version 3 - Mark scheme - May Jun 2014
Physics 0625 - Paper 2 version 3 - Mark scheme - May Jun 2014Physics 0625 - Paper 2 version 3 - Mark scheme - May Jun 2014
Physics 0625 - Paper 2 version 3 - Mark scheme - May Jun 2014
 
Physics 0625 - Paper 2 version 1 - Question Paper - May Jun 2014
Physics 0625 - Paper 2 version 1 - Question Paper - May Jun 2014Physics 0625 - Paper 2 version 1 - Question Paper - May Jun 2014
Physics 0625 - Paper 2 version 1 - Question Paper - May Jun 2014
 
Circuits
CircuitsCircuits
Circuits
 
Policy Report Responsible Research and Innovation for Science Teaching
Policy Report Responsible Research and Innovation for Science TeachingPolicy Report Responsible Research and Innovation for Science Teaching
Policy Report Responsible Research and Innovation for Science Teaching
 
Physics 0625 - Paper 1 version 3 - Question Paper - May Jun 2014
Physics 0625 - Paper 1 version 3 - Question Paper - May Jun 2014Physics 0625 - Paper 1 version 3 - Question Paper - May Jun 2014
Physics 0625 - Paper 1 version 3 - Question Paper - May Jun 2014
 
Magnetism
MagnetismMagnetism
Magnetism
 
Magnetism and Electricity - ppt useful for grade 6,7 and 8
Magnetism and Electricity - ppt useful for grade 6,7 and 8Magnetism and Electricity - ppt useful for grade 6,7 and 8
Magnetism and Electricity - ppt useful for grade 6,7 and 8
 
Science 10 Learner's Material Unit 2
Science 10 Learner's Material Unit 2Science 10 Learner's Material Unit 2
Science 10 Learner's Material Unit 2
 

Similar to 8 j magnets & electromagnets (boardworks)

Magnetism
MagnetismMagnetism
MagnetismKumar
 
Essay About Magnetic Field And Instructor Explanation
Essay About Magnetic Field And Instructor ExplanationEssay About Magnetic Field And Instructor Explanation
Essay About Magnetic Field And Instructor ExplanationJan Champagne
 
E-M Effects and Atomic Physics Y11 Physics Rotation 1 2023-24.pptx
E-M Effects and Atomic Physics Y11 Physics Rotation 1 2023-24.pptxE-M Effects and Atomic Physics Y11 Physics Rotation 1 2023-24.pptx
E-M Effects and Atomic Physics Y11 Physics Rotation 1 2023-24.pptxKristieCorpus
 
MAGNETISM and ELECTROMAGNETISM 2012.pptx
MAGNETISM and ELECTROMAGNETISM 2012.pptxMAGNETISM and ELECTROMAGNETISM 2012.pptx
MAGNETISM and ELECTROMAGNETISM 2012.pptxmarkgrant78
 
Magnetic fields and electromagnetic induction
Magnetic fields and electromagnetic inductionMagnetic fields and electromagnetic induction
Magnetic fields and electromagnetic inductionmrmeredith
 
Basic electric theory - Introduction to Magnetism.pptx
Basic electric theory - Introduction to Magnetism.pptxBasic electric theory - Introduction to Magnetism.pptx
Basic electric theory - Introduction to Magnetism.pptxhappycocoman
 
Electromagnetism Studies The Relationship Between...
Electromagnetism Studies The Relationship Between...Electromagnetism Studies The Relationship Between...
Electromagnetism Studies The Relationship Between...Angela Overton
 
Magnetism and Electromagnetism
Magnetism and ElectromagnetismMagnetism and Electromagnetism
Magnetism and ElectromagnetismShafie Sofian
 
magnetism-170505155017.pdf.pptx.........
magnetism-170505155017.pdf.pptx.........magnetism-170505155017.pdf.pptx.........
magnetism-170505155017.pdf.pptx.........CrispinoTDace
 
Magnetism and electromagnetism
Magnetism and electromagnetismMagnetism and electromagnetism
Magnetism and electromagnetismKudafaree School
 
Self Study Magnetic Particle Inspection
Self Study Magnetic Particle InspectionSelf Study Magnetic Particle Inspection
Self Study Magnetic Particle InspectionAbhishek Agyarapu
 
Magnetic particle inspection
Magnetic particle inspectionMagnetic particle inspection
Magnetic particle inspectionDENNY OTTARACKAL
 
Gcse physics P4 Magnetism and Magnetic Fields 2 copy copy.pptx
Gcse physics P4 Magnetism and Magnetic Fields 2 copy copy.pptxGcse physics P4 Magnetism and Magnetic Fields 2 copy copy.pptx
Gcse physics P4 Magnetism and Magnetic Fields 2 copy copy.pptxbashirosmanfirstacad
 

Similar to 8 j magnets & electromagnets (boardworks) (20)

Magnetism
MagnetismMagnetism
Magnetism
 
Essay About Magnetic Field And Instructor Explanation
Essay About Magnetic Field And Instructor ExplanationEssay About Magnetic Field And Instructor Explanation
Essay About Magnetic Field And Instructor Explanation
 
Unit 35 Magnetism And Magnetic Fields
Unit 35 Magnetism And Magnetic FieldsUnit 35 Magnetism And Magnetic Fields
Unit 35 Magnetism And Magnetic Fields
 
E-M Effects and Atomic Physics Y11 Physics Rotation 1 2023-24.pptx
E-M Effects and Atomic Physics Y11 Physics Rotation 1 2023-24.pptxE-M Effects and Atomic Physics Y11 Physics Rotation 1 2023-24.pptx
E-M Effects and Atomic Physics Y11 Physics Rotation 1 2023-24.pptx
 
MAGNETISM and ELECTROMAGNETISM 2012.pptx
MAGNETISM and ELECTROMAGNETISM 2012.pptxMAGNETISM and ELECTROMAGNETISM 2012.pptx
MAGNETISM and ELECTROMAGNETISM 2012.pptx
 
Module No. 26
Module No. 26Module No. 26
Module No. 26
 
Magnetic particle testing
Magnetic particle testingMagnetic particle testing
Magnetic particle testing
 
Magnetic fields and electromagnetic induction
Magnetic fields and electromagnetic inductionMagnetic fields and electromagnetic induction
Magnetic fields and electromagnetic induction
 
Basic electric theory - Introduction to Magnetism.pptx
Basic electric theory - Introduction to Magnetism.pptxBasic electric theory - Introduction to Magnetism.pptx
Basic electric theory - Introduction to Magnetism.pptx
 
Magnets and magnetism
Magnets and magnetismMagnets and magnetism
Magnets and magnetism
 
magnetism_qr.pptx
magnetism_qr.pptxmagnetism_qr.pptx
magnetism_qr.pptx
 
magnetism_qr.pptx
magnetism_qr.pptxmagnetism_qr.pptx
magnetism_qr.pptx
 
Electromagnetism Studies The Relationship Between...
Electromagnetism Studies The Relationship Between...Electromagnetism Studies The Relationship Between...
Electromagnetism Studies The Relationship Between...
 
Magnetism and Electromagnetism
Magnetism and ElectromagnetismMagnetism and Electromagnetism
Magnetism and Electromagnetism
 
magnetism-170505155017.pdf.pptx.........
magnetism-170505155017.pdf.pptx.........magnetism-170505155017.pdf.pptx.........
magnetism-170505155017.pdf.pptx.........
 
Magnetism
MagnetismMagnetism
Magnetism
 
Magnetism and electromagnetism
Magnetism and electromagnetismMagnetism and electromagnetism
Magnetism and electromagnetism
 
Self Study Magnetic Particle Inspection
Self Study Magnetic Particle InspectionSelf Study Magnetic Particle Inspection
Self Study Magnetic Particle Inspection
 
Magnetic particle inspection
Magnetic particle inspectionMagnetic particle inspection
Magnetic particle inspection
 
Gcse physics P4 Magnetism and Magnetic Fields 2 copy copy.pptx
Gcse physics P4 Magnetism and Magnetic Fields 2 copy copy.pptxGcse physics P4 Magnetism and Magnetic Fields 2 copy copy.pptx
Gcse physics P4 Magnetism and Magnetic Fields 2 copy copy.pptx
 

More from cartlidge

1 Cell Biology KnowIT.pdf
1 Cell Biology KnowIT.pdf1 Cell Biology KnowIT.pdf
1 Cell Biology KnowIT.pdfcartlidge
 
1 Cell Biology.pptx
1 Cell Biology.pptx1 Cell Biology.pptx
1 Cell Biology.pptxcartlidge
 
6 Inh Variation and Evolution.pptx
6 Inh Variation and Evolution.pptx6 Inh Variation and Evolution.pptx
6 Inh Variation and Evolution.pptxcartlidge
 
5 Homeostasis resp KnowIT nervous-system.pptx
5 Homeostasis resp KnowIT nervous-system.pptx5 Homeostasis resp KnowIT nervous-system.pptx
5 Homeostasis resp KnowIT nervous-system.pptxcartlidge
 
2 Organisation KnowIT.pdf
2 Organisation KnowIT.pdf2 Organisation KnowIT.pdf
2 Organisation KnowIT.pdfcartlidge
 
3 Infection and Resp KnowIT.pdf
3 Infection and Resp KnowIT.pdf3 Infection and Resp KnowIT.pdf
3 Infection and Resp KnowIT.pdfcartlidge
 
4 Bioenergetics KnowIT.pdf
4 Bioenergetics KnowIT.pdf4 Bioenergetics KnowIT.pdf
4 Bioenergetics KnowIT.pdfcartlidge
 
6 inh variation evol knowit.pptx
6 inh variation evol knowit.pptx6 inh variation evol knowit.pptx
6 inh variation evol knowit.pptxcartlidge
 
7 ecology knowit.pptx
7 ecology knowit.pptx7 ecology knowit.pptx
7 ecology knowit.pptxcartlidge
 
6.6 Hormones Homeo and Repro (Chris Paine)
6.6 Hormones Homeo and Repro (Chris Paine)6.6 Hormones Homeo and Repro (Chris Paine)
6.6 Hormones Homeo and Repro (Chris Paine)cartlidge
 
6.5 neurons and synapses (chris paine)
6.5 neurons and synapses (chris paine)6.5 neurons and synapses (chris paine)
6.5 neurons and synapses (chris paine)cartlidge
 
6.4 Gas Exchange (Chris Paine)
6.4 Gas Exchange (Chris Paine)6.4 Gas Exchange (Chris Paine)
6.4 Gas Exchange (Chris Paine)cartlidge
 
6.3 defence (chris paine)
6.3 defence (chris paine)6.3 defence (chris paine)
6.3 defence (chris paine)cartlidge
 
6.2 Blood System (Chris Paine)
6.2 Blood System (Chris Paine)6.2 Blood System (Chris Paine)
6.2 Blood System (Chris Paine)cartlidge
 
6.1 Digestion and Absorption (Chris Paine)
6.1 Digestion and Absorption (Chris Paine)6.1 Digestion and Absorption (Chris Paine)
6.1 Digestion and Absorption (Chris Paine)cartlidge
 
C ecology & conservation syllabus statements
C ecology & conservation syllabus statementsC ecology & conservation syllabus statements
C ecology & conservation syllabus statementscartlidge
 
Academic honesty in ib
Academic honesty in ibAcademic honesty in ib
Academic honesty in ibcartlidge
 
Cas an introduction
Cas an introductionCas an introduction
Cas an introductioncartlidge
 
11.2 muscle contraction
11.2  muscle contraction11.2  muscle contraction
11.2 muscle contractioncartlidge
 
11.2 muscle contraction
11.2  muscle contraction11.2  muscle contraction
11.2 muscle contractioncartlidge
 

More from cartlidge (20)

1 Cell Biology KnowIT.pdf
1 Cell Biology KnowIT.pdf1 Cell Biology KnowIT.pdf
1 Cell Biology KnowIT.pdf
 
1 Cell Biology.pptx
1 Cell Biology.pptx1 Cell Biology.pptx
1 Cell Biology.pptx
 
6 Inh Variation and Evolution.pptx
6 Inh Variation and Evolution.pptx6 Inh Variation and Evolution.pptx
6 Inh Variation and Evolution.pptx
 
5 Homeostasis resp KnowIT nervous-system.pptx
5 Homeostasis resp KnowIT nervous-system.pptx5 Homeostasis resp KnowIT nervous-system.pptx
5 Homeostasis resp KnowIT nervous-system.pptx
 
2 Organisation KnowIT.pdf
2 Organisation KnowIT.pdf2 Organisation KnowIT.pdf
2 Organisation KnowIT.pdf
 
3 Infection and Resp KnowIT.pdf
3 Infection and Resp KnowIT.pdf3 Infection and Resp KnowIT.pdf
3 Infection and Resp KnowIT.pdf
 
4 Bioenergetics KnowIT.pdf
4 Bioenergetics KnowIT.pdf4 Bioenergetics KnowIT.pdf
4 Bioenergetics KnowIT.pdf
 
6 inh variation evol knowit.pptx
6 inh variation evol knowit.pptx6 inh variation evol knowit.pptx
6 inh variation evol knowit.pptx
 
7 ecology knowit.pptx
7 ecology knowit.pptx7 ecology knowit.pptx
7 ecology knowit.pptx
 
6.6 Hormones Homeo and Repro (Chris Paine)
6.6 Hormones Homeo and Repro (Chris Paine)6.6 Hormones Homeo and Repro (Chris Paine)
6.6 Hormones Homeo and Repro (Chris Paine)
 
6.5 neurons and synapses (chris paine)
6.5 neurons and synapses (chris paine)6.5 neurons and synapses (chris paine)
6.5 neurons and synapses (chris paine)
 
6.4 Gas Exchange (Chris Paine)
6.4 Gas Exchange (Chris Paine)6.4 Gas Exchange (Chris Paine)
6.4 Gas Exchange (Chris Paine)
 
6.3 defence (chris paine)
6.3 defence (chris paine)6.3 defence (chris paine)
6.3 defence (chris paine)
 
6.2 Blood System (Chris Paine)
6.2 Blood System (Chris Paine)6.2 Blood System (Chris Paine)
6.2 Blood System (Chris Paine)
 
6.1 Digestion and Absorption (Chris Paine)
6.1 Digestion and Absorption (Chris Paine)6.1 Digestion and Absorption (Chris Paine)
6.1 Digestion and Absorption (Chris Paine)
 
C ecology & conservation syllabus statements
C ecology & conservation syllabus statementsC ecology & conservation syllabus statements
C ecology & conservation syllabus statements
 
Academic honesty in ib
Academic honesty in ibAcademic honesty in ib
Academic honesty in ib
 
Cas an introduction
Cas an introductionCas an introduction
Cas an introduction
 
11.2 muscle contraction
11.2  muscle contraction11.2  muscle contraction
11.2 muscle contraction
 
11.2 muscle contraction
11.2  muscle contraction11.2  muscle contraction
11.2 muscle contraction
 

Recently uploaded

COMPUTER 10: Lesson 7 - File Storage and Online Collaboration
COMPUTER 10: Lesson 7 - File Storage and Online CollaborationCOMPUTER 10: Lesson 7 - File Storage and Online Collaboration
COMPUTER 10: Lesson 7 - File Storage and Online Collaborationbruanjhuli
 
PicPay - GenAI Finance Assistant - ChatGPT for Customer Service
PicPay - GenAI Finance Assistant - ChatGPT for Customer ServicePicPay - GenAI Finance Assistant - ChatGPT for Customer Service
PicPay - GenAI Finance Assistant - ChatGPT for Customer ServiceRenan Moreira de Oliveira
 
Cloud Revolution: Exploring the New Wave of Serverless Spatial Data
Cloud Revolution: Exploring the New Wave of Serverless Spatial DataCloud Revolution: Exploring the New Wave of Serverless Spatial Data
Cloud Revolution: Exploring the New Wave of Serverless Spatial DataSafe Software
 
UiPath Studio Web workshop series - Day 6
UiPath Studio Web workshop series - Day 6UiPath Studio Web workshop series - Day 6
UiPath Studio Web workshop series - Day 6DianaGray10
 
Using IESVE for Loads, Sizing and Heat Pump Modeling to Achieve Decarbonization
Using IESVE for Loads, Sizing and Heat Pump Modeling to Achieve DecarbonizationUsing IESVE for Loads, Sizing and Heat Pump Modeling to Achieve Decarbonization
Using IESVE for Loads, Sizing and Heat Pump Modeling to Achieve DecarbonizationIES VE
 
OpenShift Commons Paris - Choose Your Own Observability Adventure
OpenShift Commons Paris - Choose Your Own Observability AdventureOpenShift Commons Paris - Choose Your Own Observability Adventure
OpenShift Commons Paris - Choose Your Own Observability AdventureEric D. Schabell
 
NIST Cybersecurity Framework (CSF) 2.0 Workshop
NIST Cybersecurity Framework (CSF) 2.0 WorkshopNIST Cybersecurity Framework (CSF) 2.0 Workshop
NIST Cybersecurity Framework (CSF) 2.0 WorkshopBachir Benyammi
 
Cybersecurity Workshop #1.pptx
Cybersecurity Workshop #1.pptxCybersecurity Workshop #1.pptx
Cybersecurity Workshop #1.pptxGDSC PJATK
 
UiPath Studio Web workshop series - Day 8
UiPath Studio Web workshop series - Day 8UiPath Studio Web workshop series - Day 8
UiPath Studio Web workshop series - Day 8DianaGray10
 
Comparing Sidecar-less Service Mesh from Cilium and Istio
Comparing Sidecar-less Service Mesh from Cilium and IstioComparing Sidecar-less Service Mesh from Cilium and Istio
Comparing Sidecar-less Service Mesh from Cilium and IstioChristian Posta
 
Basic Building Blocks of Internet of Things.
Basic Building Blocks of Internet of Things.Basic Building Blocks of Internet of Things.
Basic Building Blocks of Internet of Things.YounusS2
 
Linked Data in Production: Moving Beyond Ontologies
Linked Data in Production: Moving Beyond OntologiesLinked Data in Production: Moving Beyond Ontologies
Linked Data in Production: Moving Beyond OntologiesDavid Newbury
 
Spring24-Release Overview - Wellingtion User Group-1.pdf
Spring24-Release Overview - Wellingtion User Group-1.pdfSpring24-Release Overview - Wellingtion User Group-1.pdf
Spring24-Release Overview - Wellingtion User Group-1.pdfAnna Loughnan Colquhoun
 
UiPath Studio Web workshop series - Day 7
UiPath Studio Web workshop series - Day 7UiPath Studio Web workshop series - Day 7
UiPath Studio Web workshop series - Day 7DianaGray10
 
UWB Technology for Enhanced Indoor and Outdoor Positioning in Physiological M...
UWB Technology for Enhanced Indoor and Outdoor Positioning in Physiological M...UWB Technology for Enhanced Indoor and Outdoor Positioning in Physiological M...
UWB Technology for Enhanced Indoor and Outdoor Positioning in Physiological M...UbiTrack UK
 
Babel Compiler - Transforming JavaScript for All Browsers.pptx
Babel Compiler - Transforming JavaScript for All Browsers.pptxBabel Compiler - Transforming JavaScript for All Browsers.pptx
Babel Compiler - Transforming JavaScript for All Browsers.pptxYounusS2
 
Computer 10: Lesson 10 - Online Crimes and Hazards
Computer 10: Lesson 10 - Online Crimes and HazardsComputer 10: Lesson 10 - Online Crimes and Hazards
Computer 10: Lesson 10 - Online Crimes and HazardsSeth Reyes
 
Videogame localization & technology_ how to enhance the power of translation.pdf
Videogame localization & technology_ how to enhance the power of translation.pdfVideogame localization & technology_ how to enhance the power of translation.pdf
Videogame localization & technology_ how to enhance the power of translation.pdfinfogdgmi
 
Salesforce Miami User Group Event - 1st Quarter 2024
Salesforce Miami User Group Event - 1st Quarter 2024Salesforce Miami User Group Event - 1st Quarter 2024
Salesforce Miami User Group Event - 1st Quarter 2024SkyPlanner
 
COMPUTER 10 Lesson 8 - Building a Website
COMPUTER 10 Lesson 8 - Building a WebsiteCOMPUTER 10 Lesson 8 - Building a Website
COMPUTER 10 Lesson 8 - Building a Websitedgelyza
 

Recently uploaded (20)

COMPUTER 10: Lesson 7 - File Storage and Online Collaboration
COMPUTER 10: Lesson 7 - File Storage and Online CollaborationCOMPUTER 10: Lesson 7 - File Storage and Online Collaboration
COMPUTER 10: Lesson 7 - File Storage and Online Collaboration
 
PicPay - GenAI Finance Assistant - ChatGPT for Customer Service
PicPay - GenAI Finance Assistant - ChatGPT for Customer ServicePicPay - GenAI Finance Assistant - ChatGPT for Customer Service
PicPay - GenAI Finance Assistant - ChatGPT for Customer Service
 
Cloud Revolution: Exploring the New Wave of Serverless Spatial Data
Cloud Revolution: Exploring the New Wave of Serverless Spatial DataCloud Revolution: Exploring the New Wave of Serverless Spatial Data
Cloud Revolution: Exploring the New Wave of Serverless Spatial Data
 
UiPath Studio Web workshop series - Day 6
UiPath Studio Web workshop series - Day 6UiPath Studio Web workshop series - Day 6
UiPath Studio Web workshop series - Day 6
 
Using IESVE for Loads, Sizing and Heat Pump Modeling to Achieve Decarbonization
Using IESVE for Loads, Sizing and Heat Pump Modeling to Achieve DecarbonizationUsing IESVE for Loads, Sizing and Heat Pump Modeling to Achieve Decarbonization
Using IESVE for Loads, Sizing and Heat Pump Modeling to Achieve Decarbonization
 
OpenShift Commons Paris - Choose Your Own Observability Adventure
OpenShift Commons Paris - Choose Your Own Observability AdventureOpenShift Commons Paris - Choose Your Own Observability Adventure
OpenShift Commons Paris - Choose Your Own Observability Adventure
 
NIST Cybersecurity Framework (CSF) 2.0 Workshop
NIST Cybersecurity Framework (CSF) 2.0 WorkshopNIST Cybersecurity Framework (CSF) 2.0 Workshop
NIST Cybersecurity Framework (CSF) 2.0 Workshop
 
Cybersecurity Workshop #1.pptx
Cybersecurity Workshop #1.pptxCybersecurity Workshop #1.pptx
Cybersecurity Workshop #1.pptx
 
UiPath Studio Web workshop series - Day 8
UiPath Studio Web workshop series - Day 8UiPath Studio Web workshop series - Day 8
UiPath Studio Web workshop series - Day 8
 
Comparing Sidecar-less Service Mesh from Cilium and Istio
Comparing Sidecar-less Service Mesh from Cilium and IstioComparing Sidecar-less Service Mesh from Cilium and Istio
Comparing Sidecar-less Service Mesh from Cilium and Istio
 
Basic Building Blocks of Internet of Things.
Basic Building Blocks of Internet of Things.Basic Building Blocks of Internet of Things.
Basic Building Blocks of Internet of Things.
 
Linked Data in Production: Moving Beyond Ontologies
Linked Data in Production: Moving Beyond OntologiesLinked Data in Production: Moving Beyond Ontologies
Linked Data in Production: Moving Beyond Ontologies
 
Spring24-Release Overview - Wellingtion User Group-1.pdf
Spring24-Release Overview - Wellingtion User Group-1.pdfSpring24-Release Overview - Wellingtion User Group-1.pdf
Spring24-Release Overview - Wellingtion User Group-1.pdf
 
UiPath Studio Web workshop series - Day 7
UiPath Studio Web workshop series - Day 7UiPath Studio Web workshop series - Day 7
UiPath Studio Web workshop series - Day 7
 
UWB Technology for Enhanced Indoor and Outdoor Positioning in Physiological M...
UWB Technology for Enhanced Indoor and Outdoor Positioning in Physiological M...UWB Technology for Enhanced Indoor and Outdoor Positioning in Physiological M...
UWB Technology for Enhanced Indoor and Outdoor Positioning in Physiological M...
 
Babel Compiler - Transforming JavaScript for All Browsers.pptx
Babel Compiler - Transforming JavaScript for All Browsers.pptxBabel Compiler - Transforming JavaScript for All Browsers.pptx
Babel Compiler - Transforming JavaScript for All Browsers.pptx
 
Computer 10: Lesson 10 - Online Crimes and Hazards
Computer 10: Lesson 10 - Online Crimes and HazardsComputer 10: Lesson 10 - Online Crimes and Hazards
Computer 10: Lesson 10 - Online Crimes and Hazards
 
Videogame localization & technology_ how to enhance the power of translation.pdf
Videogame localization & technology_ how to enhance the power of translation.pdfVideogame localization & technology_ how to enhance the power of translation.pdf
Videogame localization & technology_ how to enhance the power of translation.pdf
 
Salesforce Miami User Group Event - 1st Quarter 2024
Salesforce Miami User Group Event - 1st Quarter 2024Salesforce Miami User Group Event - 1st Quarter 2024
Salesforce Miami User Group Event - 1st Quarter 2024
 
COMPUTER 10 Lesson 8 - Building a Website
COMPUTER 10 Lesson 8 - Building a WebsiteCOMPUTER 10 Lesson 8 - Building a Website
COMPUTER 10 Lesson 8 - Building a Website
 

8 j magnets & electromagnets (boardworks)

  • 1. KS3 Physics 8J Magnets and Electromagnets 1 of 29 20 © Boardworks Ltd 2004 2005
  • 2. Contents 8J Magnets and Electromagnets Magnetic materials Magnetic fields Electromagnets Summary activities 1 of 29 20 2 © Boardworks Ltd 2004 2005
  • 3. Magnetic materials Which of the metals below are magnetic metals? iro n (F e) co ba lt ne ag m 1 of 29 20 3 co pp er i um s ( g) M gold (A (C o) (Cu ) u) ni ck z c (Zn) in silver (Ag) lum a el (N i) (Al) nium i © Boardworks Ltd 2004 2005
  • 4. Magnetic materials A magnetic material is attracted to a magnet. Only iron (Fe), nickel (Ni) and cobalt (Co) are magnetic. S N N i Co Fe Au Mg 1 of 29 20 4 Cu Ag Al Zn © Boardworks Ltd 2004 2005
  • 5. Contents 8J Magnets and Electromagnets Magnetic materials Magnetic fields Electromagnets Summary activities 1 of 29 20 5 © Boardworks Ltd 2004 2005
  • 6. Forces between magnets – experiment 1 of 29 20 6 © Boardworks Ltd 2004 2005
  • 7. What is a magnetic field? The region around a magnet where it has a magnetic effect is called its magnetic field. When a magnetic material is placed in a magnetic field it will experience a force. S N The iron filings feel the effect of the magnetic field and show the direction of the forces in this region. 1 of 29 20 7 © Boardworks Ltd 2004 2005
  • 8. Shape of a magnetic field What is the shape and direction of the lines of force in the magnetic field around a bar magnet? strongest field at poles N S strongest field at poles weakest field further away from poles Where is the magnetic field strongest? 1 of 29 20 8 © Boardworks Ltd 2004 2005
  • 9. Viewing magnetic fields: N poles together Bring the north poles of two bar magnets together. S N N S What happens to the magnets? Next, bring the two north poles as close to each other as possible and place a piece of paper on top of the magnets. Carefully scatter iron filings onto the paper. Draw the pattern created by the iron filings. 1 of 29 20 9 © Boardworks Ltd 2004 2005
  • 10. Magnetic field pattern: N poles together What do you notice about the pattern of the lines of force in the region between the two north poles? S 1 of 20 10 of 29 N N S © Boardworks Ltd 2004 2005
  • 11. Viewing magnetic fields: N and S poles together Bring the north and south poles of two bar magnets together. S N S N What happens to the magnets? Next, put the north and south poles close to each other, without letting them touch, and place a piece of paper on top. Carefully scatter iron filings onto the paper. Draw the pattern created by the iron filings. 1 of 20 11 of 29 © Boardworks Ltd 2004 2005
  • 12. Magnetic field pattern: N and S poles together What do you notice about the pattern of the lines of force in the region between the north and south poles? S N S N How does this pattern compare with the pattern between the two north poles? 1 of 20 12 of 29 © Boardworks Ltd 2004 2005
  • 13. Magnetic fields – summary 1. When two like poles (e.g. two north poles or two south poles) are put together, they repel each other. 2. When two unlike poles (e.g. a north and a south pole) are put together, they attract each other. 3. Scattering iron filings around a bar magnets makes it possible to see the lines of force of the magnetic field. 1 of 20 13 of 29 © Boardworks Ltd 2004 2005
  • 14. Making a magnet A magnet can be made by magnetizing a material which is attracted to a magnet, e.g. a paper clip. There are three methods that can be used to make a magnet: Stroke a magnet along the paperclip from one end to the other and then starting from the same place, repeat the movement. The more times this is done, the more magnetic the clip becomes. Hold a nail in a magnetic field and hit it with a hammer. Put a magnetic material in a strong magnetic field. 1 of 20 14 of 29 © Boardworks Ltd 2004 2005
  • 15. Contents 8J Magnets and Electromagnets Magnetic materials Magnetic fields Electromagnets Summary activities 1 of 20 15 of 29 © Boardworks Ltd 2004 2005
  • 16. Making an electromagnet When electricity is passed through a coil of wire, the coil has a magnetic field around it. This is called an electromagnet. If the coil of wire is wrapped around a piece of iron, such as an iron nail, the magnetic field gets stronger. 1 of 20 16 of 29 © Boardworks Ltd 2004 2005
  • 17. Investigating an electromagnet An iron core at the centre of a coil of wire, increases the strength of an electromagnet. Two experiments can be carried out to investigate the other factors that can affect the strength of an electromagnet: 1. Investigate how the number of coils affects the number of paper clips attracted to an electromagnet – keep the current the same in this experiment. 2. Investigate how the size of the current affects the number of paper clips attracted to an electromagnet – keep the number of coils the same in this experiment. 1 of 20 17 of 29 © Boardworks Ltd 2004 2005
  • 18. Investigating an electromagnet – results 1 Number of coils Number of paper clips attracted 0 0 20 8 40 18 60 31 80 46 Remember – keep the current the same throughout this experiment! 1 of 20 18 of 29 © Boardworks Ltd 2004 2005
  • 19. Investigating an electromagnet – results 2 Current (A) Number of paper clips attracted 0 0 1 12 2 23 3 38 4 49 5 60 Remember – keep the number of coils the same throughout this experiment! 1 of 20 19 of 29 © Boardworks Ltd 2004 2005
  • 20. Investigating an electromagnet – graph 1 Graph to show how the number of coils affects the strength of an electromagnet number of clips attracted 50 40 30 20 10 0 0 1 of 20 20 of 29 20 40 60 number of coils 80 100 © Boardworks Ltd 2004 2005
  • 21. Investigating an electromagnet – graph 2 number of clips attracted 70 Graph to show how the current affects the strength of an electromagnet 60 50 40 30 20 10 0 0 1 of 20 21 of 29 1 2 3 current (A) 4 5 © Boardworks Ltd 2004 2005
  • 22. Using electromagnets – scrap yards A large electromagnet is used in a scrap yard to pick up and move heavy pieces of scrap metal. What metals would the electromagnet attract? What advantages does an electromagnet have over a permanent magnet? 1 of 20 22 of 29 © Boardworks Ltd 2004 2005
  • 23. Using electromagnets – door bells The circuit for a door bells includes an electromagnet. 1 of 20 23 of 29 © Boardworks Ltd 2004 2005
  • 24. Using electromagnets – relay Lifts, cars and other large electrical machines use high currents. A relay, which includes an electromagnet, is used to allow a small current in one circuit to control a large current in another circuit. 1 of 20 24 of 29 © Boardworks Ltd 2004 2005
  • 25. Electromagnets – summary 1. When electricity is passed through a coil of wire, the coil behaves like a magnet and has a magnetic field around it – this is an electromagnet. 2. There are three ways to make an electromagnet stronger:  wrap the coil of wire around an iron core;  increase the number of coils;  increase the size of the current. 3. An electromagnet can be easily turned on and off. This is why electromagnets can be used in scrapyards and as switches in electrical devices. 1 of 20 25 of 29 © Boardworks Ltd 2004 2005
  • 26. Contents 8J Magnets and Electromagnets Magnetic materials Magnetic fields Electromagnets Summary activities 1 of 20 26 of 29 © Boardworks Ltd 2004 2005
  • 27. Glossary attraction – The force that pulls things together, e.g. opposite poles of two magnets. electromagnet – A magnet made by passing electricity through a coil of wire, which often has a core inside. magnet – An object that has a magnetic field and can attract magnetic materials. magnetic field – The area around a magnet where its magnetic force can be felt. magnetic materials – Materials that are attracted to a magnet, e.g. iron, cobalt and nickel. magnetism – The non-contact force of a magnetic field. poles – The parts of a magnet where its magnetic field is strongest. repulsion – The force that pushes things away from each other, e.g. similar poles of two magnets. 1 of 20 27 of 29 © Boardworks Ltd 2004 2005
  • 28. Anagrams 1 of 20 28 of 29 © Boardworks Ltd 2004 2005
  • 29. Multiple-choice quiz 1 of 20 29 of 29 © Boardworks Ltd 2004 2005