This document discusses the basic properties and phenomena of magnetism. It describes how magnets have magnetic fields and two poles (north and south) that attract or repel each other. Magnetic materials like iron and steel can be magnetized by magnets, while non-magnetic materials are unaffected. The magnetic fields of magnets can be visualized using iron filings or a plotting compass. The Earth also has a magnetic field like a bar magnet. Electromagnets produce magnetic fields when electric currents flow through their coils, unlike permanent magnets.
1. 1. Magnetism Name Of Student..
2. 2. Sub-Heading 1.) Magnet Definition. 2.) How Magnet Works. 3.) Coulomb Law Of Magnetic Force. 4.) Magnetism. 5.) Explanation Of Magnetism. 6.) Magnetic Field. 7.) What Happens If We Broke Magnet. 8.) Magnetic Domains. 9.) Magnetizing Material. 10.) Types Of Magnetism.
3. 3. Definition: Magnets:- A magnet is any material that produces a magnetic force (Push or Pull) on a magnetic material ( such as iron etc ). E.G:-
4. 4. How Magnet Works:- • Every Magnet Has Two Poles:- 1.) North Pole. 2.) South Pole. The opposite poles attract each other while same poles repel each other. E.G:-
5. 5. Coulomb Law Of Magnetic Force:- Sir Charles Augustine de Coulomb, was first to recognized the quantitatively force exerted by the magnets and he stated that:- “The magnitude of the electrostatic force of attraction between two point charges is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them. The force is along the straight line joining them.” 𝐹𝑒 = 𝑘𝑞1 𝑞2 𝑟2
6. 6. Magnetism:- • Definition:- Magnetism is one aspect of the combined electromagnetic force. It refers to physical phenomena arising from the force caused by magnets, objects that produce fields that attract or repel other objects.
7. 7. Explanation:- A magnetic field exerts a force on particles in the field due to the Lorentz Force. As Lorentz Force is defined as:- “The force which is exerted by a magnetic field on a moving electric charge.” The motion of electrically charged particles gives rise to magnetism. The force acting on an electrically charged particle in a magnetic field depends on the magnitude of the charge, the velocity of the particle, and the strength of the magnetic field.
8. 8. Magnetic Fields:- Diagram:- • The Lines around the magnet shows area of force exerted in a region around magnet. • The forces originates from the North Pole and moves towards South Pole.
9. 9. What Happens If We Broke Magnet:- • If we broke a magnet into pieces then each piece will still have its own North Pole and South Pole and each field have its own magnetic field.
10. 10. Magnetic Domains:- • The magnetic fields in the magnets is produced by the spinning of their electrons. • These spinning of electron create tiny magnetic regions which are known as Magnetic Domains. • In Other atoms these magnetic regions (Domains) cancels each other while in magnets Domains are all lined up in a same directions. • When ever all electrons spin in a same direction magnetic field is created between them.
Magnetism is considered as one component of electromagnetic forces which refers to physical phenomena arising from the force caused by magnets, objects that create fields that attract or repel other objects.
IT INCLUDES ALL BASIC CONCEPTS DEFINITIONS,PICTURES,EXAMPLES.
BETTER TO UNDERSTAND.
BEST CONTENT WITH BEST ANIMATIONS AND TRANSITIONS.
ALSO INCLUDES EARTH MAGNETIC FIELD
DEFINITION OF EARTH MAGNETIC FIELD.
IT INCLUDES BEST EXAMPLES AND REAL LIFE EXAMPLES,WHICH CAN HELP TO UNDERSTAND THE WHOLE CONCEPT.
1. 1. Magnetism Name Of Student..
2. 2. Sub-Heading 1.) Magnet Definition. 2.) How Magnet Works. 3.) Coulomb Law Of Magnetic Force. 4.) Magnetism. 5.) Explanation Of Magnetism. 6.) Magnetic Field. 7.) What Happens If We Broke Magnet. 8.) Magnetic Domains. 9.) Magnetizing Material. 10.) Types Of Magnetism.
3. 3. Definition: Magnets:- A magnet is any material that produces a magnetic force (Push or Pull) on a magnetic material ( such as iron etc ). E.G:-
4. 4. How Magnet Works:- • Every Magnet Has Two Poles:- 1.) North Pole. 2.) South Pole. The opposite poles attract each other while same poles repel each other. E.G:-
5. 5. Coulomb Law Of Magnetic Force:- Sir Charles Augustine de Coulomb, was first to recognized the quantitatively force exerted by the magnets and he stated that:- “The magnitude of the electrostatic force of attraction between two point charges is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them. The force is along the straight line joining them.” 𝐹𝑒 = 𝑘𝑞1 𝑞2 𝑟2
6. 6. Magnetism:- • Definition:- Magnetism is one aspect of the combined electromagnetic force. It refers to physical phenomena arising from the force caused by magnets, objects that produce fields that attract or repel other objects.
7. 7. Explanation:- A magnetic field exerts a force on particles in the field due to the Lorentz Force. As Lorentz Force is defined as:- “The force which is exerted by a magnetic field on a moving electric charge.” The motion of electrically charged particles gives rise to magnetism. The force acting on an electrically charged particle in a magnetic field depends on the magnitude of the charge, the velocity of the particle, and the strength of the magnetic field.
8. 8. Magnetic Fields:- Diagram:- • The Lines around the magnet shows area of force exerted in a region around magnet. • The forces originates from the North Pole and moves towards South Pole.
9. 9. What Happens If We Broke Magnet:- • If we broke a magnet into pieces then each piece will still have its own North Pole and South Pole and each field have its own magnetic field.
10. 10. Magnetic Domains:- • The magnetic fields in the magnets is produced by the spinning of their electrons. • These spinning of electron create tiny magnetic regions which are known as Magnetic Domains. • In Other atoms these magnetic regions (Domains) cancels each other while in magnets Domains are all lined up in a same directions. • When ever all electrons spin in a same direction magnetic field is created between them.
Magnetism is considered as one component of electromagnetic forces which refers to physical phenomena arising from the force caused by magnets, objects that create fields that attract or repel other objects.
IT INCLUDES ALL BASIC CONCEPTS DEFINITIONS,PICTURES,EXAMPLES.
BETTER TO UNDERSTAND.
BEST CONTENT WITH BEST ANIMATIONS AND TRANSITIONS.
ALSO INCLUDES EARTH MAGNETIC FIELD
DEFINITION OF EARTH MAGNETIC FIELD.
IT INCLUDES BEST EXAMPLES AND REAL LIFE EXAMPLES,WHICH CAN HELP TO UNDERSTAND THE WHOLE CONCEPT.
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2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
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3. LEARNING
OBJECTIVES
Core
•Describe the forces between magnets,
and between magnets and magnetic
materials
• Give an account of induced magnetism
• Distinguish between magnetic and non-
magnetic materials
• Describe methods of magnetisation, to
include stroking with a magnet, use of
d.c. in a coil and hammering in a
magnetic field
• Draw the pattern of magnetic field
lines around a bar magnet
• Describe an experiment to identify
the pattern of magnetic field lines,
including the direction
• Distinguish between the magnetic
properties of soft iron and steel
• Distinguish between the design and
use of permanent magnets and
electromagnets
Supplement
Explain that magnetic forces are due to
interactions between magnetic fields
• Describe methods of demagnetisation, to
include hammering, heating and use of a.c. in
a coil
6. Magnets
N S
Properties
Have magnetic
fields around
them.
Have two opposite poles (N & S)
– like poles repel, unlike poles
attract.
Exert little or
no force on a
non-magnetic
material.
Attracted?
.. possibly?
7. Magnets
N S
Properties
Have magnetic
fields around
them.
Have two opposite poles (N & S)
– like poles repel, unlike poles
attract.
Exert little or
no force on a
non-magnetic
material.Attract magnetic
materials by
inducing magnetism
in them.
N
Iron Steel
Attracted?
.. hopefully?
8. Magnets
N S
Properties
Have magnetic
fields around
them.
Have two opposite poles (N & S)
– like poles repel, unlike poles
attract.
Exert little or
no force on a
non-magnetic
material.Attract magnetic
materials by
inducing magnetism
in them.
N
Poles induced in both iron and steel.
S
N
S
N
Attracted?
.. mmmm?
9. Magnets
N S
Properties
Have magnetic
fields around
them.
Have two opposite poles (N & S)
– like poles repel, unlike poles
attract.
Exert little or
no force on a
non-magnetic
material.Attract magnetic
materials by
inducing magnetism
in them.
N
Iron loses
magnetism – it was
only a temporary
magnet
S
N
Steel retains magnetism
– it became a permanent
magnet
Attracted?
YES!!!
10. Magnets – make your own!
N S
S
N
How strong is it?
Not very.
Placing a piece of steel near a magnet
makes it permanently magnetised,
but its magnetism is usually weak.
11. Magnets – make your own!
N
How strong is it?
Getting stronger.
The magnet can be magnetized more
strongly by stroking it with one end
of a magnet
S
Wide sweep away
from the steel
Induced poles
12. Magnets – make your own!
How strong is it?
Strongest!
The best way of magnetizing is to
place the steel bar in a long coil of
wire and pass a large, direct (one
way) current through the coil. The
coil has a magnetic effect which
magnetizes the steel.
Coil
Steel
13. Magnets – how do they work?
N SJust what is
happening inside
the magnet to
make it
magnetic?
14. Magnets – how do they work?
N SJust what is
happening inside
the magnet to
make it
magnetic?
We need to look closely at what
is happening to the particles
(electrons) inside the magnet.
15. Magnets – how do they work?
N SJust what is
happening inside
the magnet to
make it
magnetic?
We need to look closely at what
is happening to the particles
(electrons) inside the magnet.
In an unmagnetized material,
the tiny electrons, or atomic
magnets point in random
directions.
16. Magnets – how do they work?
N SJust what is
happening inside
the magnet to
make it
magnetic?
We need to look closely at what
is happening to the particles
(electrons) inside the magnet.
When the material becomes
magnetized, more and more
of the tiny atomic magnets
line up with each other. They
act as one BIG magnet.
17. Magnets – how do they work?
N SJust what is
happening inside
the magnet to
make it
magnetic?
We need to look closely at what
is happening to the particles
(electrons) inside the magnet.
If a magnet is hit with a hammer,
the tiny atomic magnets get
thrown out of line again, so the
material becomes demagnetised.
18. Magnets – how do they work?
N SJust what is
happening inside
the magnet to
make it
magnetic?
We need to look closely at what
is happening to the particles
(electrons) inside the magnet.
If a magnet is hit with a hammer,
the tiny atomic magnets get
thrown out of line again, so the
material becomes demagnetised.
A magnet will also
become demagnetized
if heated to high
temperature.
20. Magnetic and non-magnetic
Magnetic material – can be
magnetized, and is attracted to
magnets. Strongly magnetic
materials contain iron, nickel or
cobalt (eg. Steel is mainly iron).
21. Magnetic and non-magnetic
Magnetic material – can be
magnetized, and is attracted to
magnets. Strongly magnetic
materials contain iron, nickel or
cobalt (eg. Steel is mainly iron).
Ferromagnets
Hard magnetic materials,
eg. Steel, alloys (Alcomax,
Magnadur). Difficult to
magnetise, but do not
lose their magnetism.
Used for permanent
magnets.
22. Magnetic and non-magnetic
Magnetic material – can be
magnetized, and is attracted to
magnets. Strongly magnetic
materials contain iron, nickel or
cobalt (eg. Steel is mainly iron).
Ferromagnets
Hard magnetic materials,
eg. Steel, alloys (Alcomax,
Magnadur). Difficult to
magnetise, but do not
lose their magnetism.
Used for permanent
magnets.
Soft magnetic materials,
eg. Iron, Mumetal.
Relatively easy to
magnetise, but magnetism
is temporary. Used in
electromagnets and
transformers.
23. Magnetic and non-magnetic
Magnetic material – can be
magnetized, and is attracted to
magnets. Strongly magnetic
materials contain iron, nickel or
cobalt (eg. Steel is mainly iron).
Ferromagnets
Hard magnetic materials,
eg. Steel, alloys (Alcomax,
Magnadur). Difficult to
magnetise, but do not
lose their magnetism.
Used for permanent
magnets.
Soft magnetic materials,
eg. Iron, Mumetal.
Relatively easy to
magnetise, but magnetism
is temporary. Used in
electromagnets and
transformers.
Non-magnetic materials.
Metals (brass, copper,
zinc, tin and aluminium);
non-metals.
26. Magnetic fields
Iron filings sprinkled
around a magnet
Magnetic field lines
around the magnet
Field lines run from the
north pole (N) to the
south pole (S). The
magnetic field is
strongest where the field
lines are closer together.
34. Magnetic fields
Using a plotting compass to find
the field lines.
http://www.physbot.co.uk/magnetic-fields-and-induction.html
35. Magnetic fields
Interactions between magentic
fields
http://www.homofaciens.de/technics-magnetic-field-energy_en_navion.htm
When unlike poles are placed near
each other, their magnetic fields
combine to produce a single field of
almost uniform strength.
36. Magnetic fields
Interactions between magentic
fields
http://www.homofaciens.de/technics-magnetic-field-energy_en_navion.htm
When unlike poles are placed near
each other, their magnetic fields
combine to produce a single field of
almost uniform strength.
When like poles are placed near each
other, their magnetic fields cancel
each other, and there is a neutral
point where the combined field
strength is zero.
Neutral point
37. The Earth’s magnetic field
The Earth’s magnetic field is like
that around a very large, but very
weak, bar magnet.
38. The Earth’s magnetic field
The Earth’s magnetic field is like
that around a very large, but very
weak, bar magnet.
A compass ‘north’ end points
north. But a north pole is always
attracted to a south pole, so the
Earth’s magnetic south pole must
actually be in the north.
39. The Earth’s magnetic field
The Earth’s magnetic field is like
that around a very large, but very
weak, bar magnet.
A compass ‘north’ end points
north. But a north pole is always
attracted to a south pole, so the
Earth’s magnetic south pole must
actually be in the north.
The Earth’s magnetic north is
actually over 1200km away from
the true geographic north pole.
40. The Earth’s magnetic field
The Earth’s magnetic field is like
that around a very large, but very
weak, bar magnet.
A compass ‘north’ end points
north. But a north pole is always
attracted to a south pole, so the
Earth’s magnetic south pole must
actually be in the north.
The Earth’s magnetic north is
actually over 1200km away from
the true geographic north pole.
Over a period of
time the Earth’s
magnetic pole will
‘flip’.
41. The Earth’s magnetic field
The Earth’s magnetic field is like
that around a very large, but very
weak, bar magnet.
A compass ‘north’ end points
north. But a north pole is always
attracted to a south pole, so the
Earth’s magnetic south pole must
actually be in the north.
The Earth’s magnetic north is
actually over 1200km away from
the true geographic north pole.
Over a period of
time the Earth’s
magnetic pole will
‘flip’.
In the last 10 million
years, there have been,
on average, 4 or 5
‘flips’ per million years.
43. Electromagnets
Distinguish between
the design and use
of permanent
magnets and
electromagnets
Unlike bar magnets, which are
permanent magnets, the
magnetism of electromagnets
can be turned on and off.
44. Electromagnets
Distinguish between
the design and use
of permanent
magnets and
electromagnets
Unlike bar magnets, which are
permanent magnets, the
magnetism of electromagnets
can be turned on and off.
Permanent magnet uses:
1. Needles of compasses.
2. Fridge door seals, holding
the doors closed.
3. Loudspeakers and
microphones.
45. Electromagnets
Distinguish between
the design and use
of permanent
magnets and
electromagnets
Unlike bar magnets, which are
permanent magnets, the
magnetism of electromagnets
can be turned on and off.
Permanent magnet uses:
1. Needles of compasses.
2. Fridge door seals, holding
the doors closed.
3. Loudspeakers and
microphones.
switch battery
coil
Soft iron
core
When a current flows
through the coil it
produces a magnetic
field. This field is
temporary and is lost
when the current is
switched off.
46. Electromagnets
Distinguish between
the design and use
of permanent
magnets and
electromagnets
Unlike bar magnets, which are
permanent magnets, the
magnetism of electromagnets
can be turned on and off.
Permanent magnet uses:
1. Needles of compasses.
2. Fridge door seals, holding
the doors closed.
3. Loudspeakers and
microphones.
switch battery
coil
Soft iron
core
When a current flows
through the coil it
produces a magnetic
field. This field is
temporary and is lost
when the current is
switched off.
Strength increased by:
- Increasing the current
- Increasing number of turns
47. Electromagnets
Distinguish between
the design and use
of permanent
magnets and
electromagnets
Unlike bar magnets, which are
permanent magnets, the
magnetism of electromagnets
can be turned on and off.
Permanent magnet uses:
1. Needles of compasses.
2. Fridge door seals, holding
the doors closed.
3. Loudspeakers and
microphones.
switch battery
coil
Soft iron
core
When a current flows
through the coil it
produces a magnetic
field. This field is
temporary and is lost
when the current is
switched off.
Strength increased by:
- Increasing the current
- Increasing number of turns
Uses: scrapyard
electromagnets, circuit
breakers, relays, electric bells.
48. LEARNING
OBJECTIVES
Core
•Describe the forces between magnets,
and between magnets and magnetic
materials
• Give an account of induced magnetism
• Distinguish between magnetic and non-
magnetic materials
• Describe methods of magnetisation, to
include stroking with a magnet, use of
d.c. in a coil and hammering in a
magnetic field
• Draw the pattern of magnetic field
lines around a bar magnet
• Describe an experiment to identify
the pattern of magnetic field lines,
including the direction
• Distinguish between the magnetic
properties of soft iron and steel
• Distinguish between the design and
use of permanent magnets and
electromagnets
Supplement
Explain that magnetic forces are due to
interactions between magnetic fields
• Describe methods of demagnetisation, to
include hammering, heating and use of a.c. in
a coil