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hello friends this video on fun with

magnets part 1 is brought to you by exam

vo calm no more fear from exam topics to

be covered in this lesson our

introduction magnet discovery of magnet

magnetic and non-magnetic materials

poles of magnet magnet finds directions

different types of magnets attraction

and repulsion between magnets so before

we have fun with magnets you might be

interested or curious to know what a

magnet is now have I ever noticed that

sometimes if you bring objects like

nails or any other objects made up of

iDEN specially when you try to bring

them near an object what happens they

try to stick to that object they get

attracted towards that object so so

right now you don't know what that

object is but it is like a small piece

of some heavy better light thing that's

how it appear to be but whenever you

bring some specific metals near it like

Ireland nails so these males tend to get

attracted towards that object not only

that if you have ever noticed a magnetic

compass I mean this is a small dial

which looks almost like the dial of your

wristwatch but it doesn't show you time

instead it tells you directions that

which there is not which this out so it

has a needle with a red and this needle

points and the directions so what does

this little I mean how does that needle

detect directions so these are

interesting stuffs think of a

screwdriver have you ever seen a

screwdriver you must have I mean it is

if it is something which is very

commonly kept in houses because it helps

you to you know screw and unscrew little

stubs in your house so if you look at

the tip of the screwdriver so there is

some

at the tip of the screwdriver that

whenever you bring these kind of objects

like iron nails near it they tend to get

attracted towards it

think of the doors of the trains not the

not all the trains of course but mostly

the Metro so if you have ever been into

the Metro in Delhi or Calcutta or Mumbai

in the metro trains you would see that

how the doors get closed and when the

doors get closed on their own and that

is something due to which the two doors

get attracted towards each other as they

come nearer

so not only the doors in Metro take

trains but a lot of in a lot of other

places for example when you look at the

refrigerators are even the glass doors

in many companies or malls you see that

they tend to get the two slides of the

door when they come nearer they tend to

get attracted to each other so wherever

you are seeing these kind of attraction

there is no magic there is a simple

science behind so you talk about the CDs

or you talk about the fridge magnets so

have you ever seen that there are some

small small objects maybe some cartoons

or some pictures and they wherever you

take them near the surface of the fridge

they stick to the fridge so we often

want them as fridge magnets so why do

they stick to the body of the

refrigerator what special is there

behind these objects so in each of these

examples you see that there is some

object which is trying to attract some

certain objects so this object which has

this property of you know kind of

attracting certain materials this object

is a magnet and magnet is widely used in

various applications for example you

look at various electrical devices

whether you talk about the generators

the motors so you see that a magnet

a very important role inside them so we

were not getting to that detail but here

in this lesson I will just introduce

magnet what a magnet is what are the

basic properties of a magnet so so we

will just have a very brief introduction

of magnet so what is a magnet it is an

object that exhibits the property to

attract certain materials towards itself

now please make a note of it that it can

attract only certain materials and not

all so please do not think that if you

have a magnet you can attract anything a

human being will not get attracted

towards the magnet or a piece of paper

will not get attracted towards the

magnet so there are certain specific

materials which only get attracted

towards a magnet but why the magnet

attracts to specific materials and what

are those specific materials so we will

learn about them gradually step by step

so the best example of magnet that you

can think of is the fridge magnet so

maybe if any one of you have never seen

a magnet so I think this would be the

most easily available magnet so if even

if you don't have it in your home you

can just worry any shop and you can ask

for a fridge magnet and then you will

see that it's like a any picture or

statue or something and behind it there

is a small magnet so as you bring it

near the refrigerator it sticks to the

refrigerator so again while it sticks to

the refrigerator because the body of the

refrigerator is made up of iron so again

as I say there are only certain

materials in spirit similarly if you

have a screwdriver in your home then

just have a observe the tip of the

screwdriver now let me ask you something

why do we use true driver so mostly when

you want to say screw up something maybe

in screw up in the sense when you want

to fit a screw into something to fit to

different parts of any object or when

you want to remove separate the two

parts then

and you want to unscrew it so what

happens is even these kind of nails so

these are also made up of iron so these

materials get attracted towards this tip

of the screwdriver so that helps the

screwdriver to do its job so here also

you see that the tip has up it is

actually a magnetic tip so there is a

small magnet at the tip of the

screwdriver so just try it out you also

just try to bring some iron nails near

the tip of a screwdriver and you will

see that the nails tend to get attracted

towards it so these are some very common

examples of magnets so just try to

observe them and try to see the this

beautiful property of magnets this will

help you to understand what a magnet is

thank you

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