Class 6 Exam > Class 6 Videos > Discovery of Magnet; types of Magnet - Fun with Magnets, Science, Class 6
Discovery of Magnet; types of Magnet - Fun with Magnets, Science, Class 6 Video Lecture
FAQs on Discovery of Magnet; types of Magnet - Fun with Magnets, Science, Class 6 Video Lecture
| 1. What is the discovery of magnet? |  |
Ans. The discovery of magnets is believed to date back to ancient times, with the first known magnets being naturally occurring lodestones. The discovery of magnets is often attributed to the ancient Greeks, Chinese, and Indians who observed that certain rocks had the ability to attract iron objects.
| 2. What are the types of magnets? | |
Ans. There are several types of magnets, including:
- Permanent Magnets: These are magnets that retain their magnetic field without the need for an external source of magnetism. They are commonly made from materials such as iron, nickel, and cobalt.
- Temporary Magnets: These magnets can be magnetized temporarily by an external magnetic field. Once the external field is removed, they lose their magnetism. Examples include soft iron and electromagnets.
- Electromagnets: These magnets are created by passing an electric current through a coil of wire. The magnetic field is produced as long as the current flows. Electromagnets are widely used in various applications, including electric motors and generators.
- Bar Magnets: Bar magnets have a rectangular or bar-shaped structure. They have a north pole at one end and a south pole at the other.
- Ring Magnets: As the name suggests, ring magnets have a circular or ring-shaped structure. The magnetic field lines of a ring magnet circulate through the ring, forming a closed loop.
| 3. How do magnets work? | |
Ans. Magnets work due to the alignment of magnetic domains within their material. Each magnet is made up of countless tiny magnetic regions called domains. In their natural state, these domains are randomly oriented, resulting in no net magnetic field. However, when a magnet is magnetized, the domains align in a specific direction, creating a net magnetic field.
This alignment is achieved by exposing the material to an external magnetic field or by rubbing it against a magnet. Once magnetized, the magnet generates its own magnetic field and attracts or repels other magnets or magnetic materials based on the interaction between their magnetic fields.
| 4. What are the uses of magnets? | |
Ans. Magnets have numerous practical applications in various fields. Some common uses of magnets include:
- Magnetic Storage: Magnets are used in hard drives, cassette tapes, and other magnetic storage media to store and retrieve digital data.
- Electric Motors and Generators: Magnets play a crucial role in electric motors and generators by creating a magnetic field that interacts with electrical currents to produce motion or generate electricity.
- Medical Equipment: Magnets are used in medical equipment such as MRI (Magnetic Resonance Imaging) machines to create detailed images of internal body structures.
- Magnetic Separation: Magnets are used to separate magnetic substances from non-magnetic materials in industries such as mining and recycling.
- Magnetic Levitation: Magnets are utilized in magnetic levitation (maglev) trains and experimental transportation systems to suspend and propel vehicles using magnetic forces.
| 5. Can magnets lose their magnetism over time? | |
Ans. Yes, magnets can lose their magnetism over time, but the rate of demagnetization depends on various factors. Some of the common reasons for magnet demagnetization include exposure to high temperatures, strong external magnetic fields, and physical damage.
High temperatures can cause the alignment of magnetic domains to become disordered, leading to a loss of magnetism. Strong external magnetic fields can also realign the domains in the opposite direction, demagnetizing the magnet. Physical damage, such as dropping or hammering a magnet, can disrupt the alignment of domains and result in demagnetization.
However, most permanent magnets used in everyday applications retain their magnetism for a long time under normal conditions.
Text Transcript from Video
hello friends this video on fun with
magnets part 2 is brought to you by exam
for calm no more fear from exam now the
question is how was such a beautiful
thing discovered and who discovered that
okay certain objects have this property
that they can attract some of the new
objects now there are a lot of stories
which are normally heard with regards to
the discovery of magnets so the most
common story which is heard is that of a
ship Shepard named Magnus so he was a
shepherd whose name was Magnus and he as
usual Evan as part of his daily routine
yeah he used to take his sheep for a
ship for grazing in the field and one
fine day something different happened he
discovered a mysterious stone and what
was the mystery behind that stone he
found that there was a stone that
attracted his stick so he had a stick
like normally you would have seen that
the Shepherd had have a stick to it
where they take out take their animals
for grazing later he found that and
stick got attracted to a stone in fact
it stuck to that stone and it was kind
of difficult for him to bring his stick
back so he was thinking what why does it
happen why did it happen only with that
particular piece of stone and not with
all the other stones in that area so
actually the reason was that his stick
had a small piece of iron attached at
one end now due to the presence of iron
or iron falls under the category of
those materials which are attracted by a
magnet now the stone was nothing but a
magnet so something like this so there
exists
magnets in nature that is certain stone
certain rocks have a property that they
can attract certain materials so they
are nothing but Batman's
so this is how the first natural magnet
was discovered and after the name of
this Shepherd it was called magnet so
that is one story with regards to the
GNAT discovery of natural magnets then
there is another story which sees that
there was a place named magnesia in Asia
so this was the place called magnesia so
it was seeing that in magnesia many such
magical stones or rocks by found which
has the property of attracting certain
materials so since a lot of magical
stones are a lot of magnets were found
in this region so the name magnet was
given after the name of this place so
the name of the place was madness and
that is why the word magnet was given to
these special type of magical stones or
rocks so this is how magnet was
discovered so it basically nobody
created magnet for the first time magnet
was something which already existed in
nature so these were certain objects
which has this problem which had this
property within them that they could
attract certain specific materials now
today what we see as magnets are there
are many different types of magnets
which we see around us now they are
available in different shapes and sizes
now it is not only the natural magnets
which existed today even artificial
magnets exist to do so today we also go
how to make a magnet so we can create
magnets so basically we have natural
magnets which are a drops with these
kind of magical properties which exist
in nature on their own
and the other set of magnets are those
which are created by us and they are the
artificial magnets so when you talk
about these magnets which exist in
nature these are nothing but the natural
magnets on the other hand when we talk
about magnets of Baileys shapes and
sizes for example this is a bad magnet
so it is like a kind of rectangular body
we also have magnets in the shape of a
user which is also called a horseshoe
magnet now since we are able to you know
kind of manufacture or we can make
magnets so now we can do that in daily
shapes so we also have magnets in the
shape of cylinders these are one
cylindrical magnets we also have magnets
with which have balls at their ends it
is like a rod in between and then two
balls at two ends so these are termed as
the ball ended magnet so this is a ball
ended magnet
so you see variety of magnets are being
created so these all fall under the
category of artificial magnets so you
have some natural magnets and we also
have some artificial magnets
so these artificial magnets are normally
created from iron and since it is
artificially created they come in many
shapes and they are used for different
purpose or depending upon the
application where we want to make use of
this magnet we decide which type of
magnet need to be used thank you please
visit www.gfi.com/webmonitor
magnets part 2 is brought to you by exam
for calm no more fear from exam now the
question is how was such a beautiful
thing discovered and who discovered that
okay certain objects have this property
that they can attract some of the new
objects now there are a lot of stories
which are normally heard with regards to
the discovery of magnets so the most
common story which is heard is that of a
ship Shepard named Magnus so he was a
shepherd whose name was Magnus and he as
usual Evan as part of his daily routine
yeah he used to take his sheep for a
ship for grazing in the field and one
fine day something different happened he
discovered a mysterious stone and what
was the mystery behind that stone he
found that there was a stone that
attracted his stick so he had a stick
like normally you would have seen that
the Shepherd had have a stick to it
where they take out take their animals
for grazing later he found that and
stick got attracted to a stone in fact
it stuck to that stone and it was kind
of difficult for him to bring his stick
back so he was thinking what why does it
happen why did it happen only with that
particular piece of stone and not with
all the other stones in that area so
actually the reason was that his stick
had a small piece of iron attached at
one end now due to the presence of iron
or iron falls under the category of
those materials which are attracted by a
magnet now the stone was nothing but a
magnet so something like this so there
exists
magnets in nature that is certain stone
certain rocks have a property that they
can attract certain materials so they
are nothing but Batman's
so this is how the first natural magnet
was discovered and after the name of
this Shepherd it was called magnet so
that is one story with regards to the
GNAT discovery of natural magnets then
there is another story which sees that
there was a place named magnesia in Asia
so this was the place called magnesia so
it was seeing that in magnesia many such
magical stones or rocks by found which
has the property of attracting certain
materials so since a lot of magical
stones are a lot of magnets were found
in this region so the name magnet was
given after the name of this place so
the name of the place was madness and
that is why the word magnet was given to
these special type of magical stones or
rocks so this is how magnet was
discovered so it basically nobody
created magnet for the first time magnet
was something which already existed in
nature so these were certain objects
which has this problem which had this
property within them that they could
attract certain specific materials now
today what we see as magnets are there
are many different types of magnets
which we see around us now they are
available in different shapes and sizes
now it is not only the natural magnets
which existed today even artificial
magnets exist to do so today we also go
how to make a magnet so we can create
magnets so basically we have natural
magnets which are a drops with these
kind of magical properties which exist
in nature on their own
and the other set of magnets are those
which are created by us and they are the
artificial magnets so when you talk
about these magnets which exist in
nature these are nothing but the natural
magnets on the other hand when we talk
about magnets of Baileys shapes and
sizes for example this is a bad magnet
so it is like a kind of rectangular body
we also have magnets in the shape of a
user which is also called a horseshoe
magnet now since we are able to you know
kind of manufacture or we can make
magnets so now we can do that in daily
shapes so we also have magnets in the
shape of cylinders these are one
cylindrical magnets we also have magnets
with which have balls at their ends it
is like a rod in between and then two
balls at two ends so these are termed as
the ball ended magnet so this is a ball
ended magnet
so you see variety of magnets are being
created so these all fall under the
category of artificial magnets so you
have some natural magnets and we also
have some artificial magnets
so these artificial magnets are normally
created from iron and since it is
artificially created they come in many
shapes and they are used for different
purpose or depending upon the
application where we want to make use of
this magnet we decide which type of
magnet need to be used thank you please
visit www.gfi.com/webmonitor
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Nov 17, 2024 Last updated |
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