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  • oh no

  • there is no electricity I was just about to finish my game

  • have to restart it now food

  • seems like there is still a problem in the electricity supplies

  • Don't worry it'll be back in a moment. Wow

  • it's back.We can't on do anything without electricity

  • these days .Yeah, but do you know from where your electricity comes

  • from? I think it comes from that switch !

  • Right?

  • You are very right!Electricity comes to this TV from this switch.

  • But what about the source of all the electricity

  • that comes to everyone's home?Let me ask my friends

  • Do you know where electricity comes from

  • Do you want to k now the sources of it and how it is produced?

  • Ok,ok.Take a look here.

  • What is this?

  • This is a coil of wire and a magnet mounted on a shaft.

  • What it is used for?It is used to produce electricity.

  • But how? If we spin a magnet around with-in a coil of wire

  • electricity is produced in the wire.

  • Oh, it is so simple!

  • All we need to have is a coil of wire

  • and a magnet to make electricity. And just spin the magnet with-in the coil.

  • This process is known as electromagnetic induction

  • Can I spin this magnet? Oh yes!

  • But let me first attach a small electric bulb with the wires.

  • Now you can spin the magnet with the help of the handle.

  • Wow ,the bulb is on!

  • So guys now you know the basics of producing electricity !

  • Now something to remember ! The machine

  • having a magnet and coil of wire ,in this way, is known

  • as generator .So we need a generator like this to produce electricity?

  • Yes, in most of the cases a generator is required.

  • Wow ! Now I can produce electricity

  • electricity for my entire home

  • with this generator . But see,this is too small !

  • This can light up only a small bulb.

  • You need a big generator for getting more electricity.

  • Let me show you !

  • Oh ,it does not look like the earlier generator!

  • Let's peep inside!

  • Oh yes, it also has a big magnet

  • linked with a shaft and wires all around it.

  • Remember every generator has this kind of arrangement inside it.

  • Hmmm, if I spin this generator shaft

  • I can light up my entire home !

  • Hmmm, now try to move it.

  • Ah

  • Ah

  • I can't spin it.

  • It is very heavy to move.

  • Now have a look at these giant generators!

  • Oh,wow! That's so huge.Yeah,these big generators are used to produce electricity

  • for a whole city.But how do they spin the magnet inside these big generators?

  • I can't even move the smaller one!

  • To move the magnet inside the big generator

  • a big fan is attached to this shaft.

  • A big fan? Yeah, look here.

  • These big bands are called

  • turbines. Turbines?

  • Yeah,turbines.

  • Friends! hope you remember generator ,the machine to make electricity !

  • now I remember turbine that is the second most important tool

  • A turbine helps the generator to work

  • so that it can produce electricity.

  • But how does this fan,I mean turbine help

  • in turning the generator?Look here!

  • In some cases ,a lot of water is poured over this

  • The flowing water makes it turn.When the turbine moves,

  • shaft of the generator also moves.

  • Wow ! so water helps in running the generator! You got it right! The electricity

  • is generated with the help of the water .This kind of electricity is known as hydroelectricity

  • The word hydro means related to water.

  • But to turn a big generator ,we may need a lot of water?

  • From where all this water will come ?

  • For that ,we need to visit a dam.

  • Dam?What is a dam?Let's go and see !

  • Wow! There is a lot of water here!Seems like water is being stopped here!

  • Yes, it is a kind of a barrier to

  • to stop river water.Lot of water is collected

  • here. But why? Well

  • Jimmy ,this stored water is used either for

  • water supplies or for generating electricity.Oh !

  • That is why there are a lot of turbines

  • and generators nearby!

  • This is called hydro-electric plant.

  • Water from higher level flows into a pipe that carries it down

  • to a turbine.As water moves down ,it gains a lot of pressure

  • This flowing water drives the turbine

  • that is connected to the generator.And inside the generator ,

  • there is a large electromagnet

  • in the coil of copper wire.

  • When this magnet rotates inside the coil of wire.

  • electricity is produced.Then it is sent to our homes

  • through transmission lines.Wow! It is so clear to me

  • Water from the dam

  • moves the turbine,turbine drives the generator. And generator

  • produces the electricity.Guys,

  • have a closer look.This is how water helps in producing electricity.

  • me visit do the damn let interesting

  • but camby is any are deleted on the turbine

  • yet down many believe in many cases

  • it is moved by 15 ski you much how Kim scheme rules

  • any plane

  • it all look at this Kenya finnick

  • eat is very simple have to be 07

  • NT Wright see

  • anticipating feeling deadline

  • we need them home on one Daniel

  • made you sexcii Union the mitigation

  • bomber like 10 only yeah steam is a

  • gas it is just like any you

  • let me try to make this stop by spin

  • 0 he did not even Red Bull winch

  • kid it is very heavy we need not depression

  • Remi no I don't need to move it but some they have really get that much of

  • in more to be electricity generating plants what

  • if put in Big Bang being it is blind to produce steam and take care bye

  • is moved with the creation of 15 like my

  • a meal yet now let's see how the whole system black

  • like your

  • is eating I'm kit Jenny sistine and st. moves Dec 2009

  • that Spain's shaft connected to a maddening inside the final blinds

  • bad can you name the fuel used for heating the wanted to do

  • team me can use electricity to heat water

  • like we used to take fine and he's a act or

  • here right like using electricity to produce electricity can be baby costly

  • think not me

  • we can use coolly Kenyan we can use

  • own we can also use natural gas if but I owe my life

  • are you paying him thatcher I doors fossil fuels

  • so we can you just call it and natural gas as fuel

  • to be able to walk out you can use team don't look down by

  • yet kathleen you think each student you

  • electricity these is also called permanent enmity

  • and this is done income made plans correct

  • but that lunch where we use uranium F you want to produce electricity

  • I'm known as nuclear power plant from

  • I am by eight bring when

  • in finding all for sale feel its main gate

  • all well then there would be no electricity in this wind

  • from even find itself by me the

  • our finding new ways to generate electricity my

  • am now formally 250 is being produced a handful

  • wing and live in fact mom

  • that is a complete can you tell me more about peace

  • okay you can this is going to wind me

  • he believes om windmill def to buying

  • didn't need to move due to the wind 0

  • still we don't feeling we can generate the electricity

  • now tell me about the Wii's to get electricity from the Sun

  • yea read it

  • feet goodnight for on special plan is God

  • for duplicate fans be faulted use electricity

  • while buchanan et tu City

  • far in finite PDF file name: and Sun

  • has bball only speaking feel bad from home but

  • like dumb what

  • feel big deal is on dance and electromagnetic induction

  • also click on this link to be made up a raise

  • on MeetMe d news dot com

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電是如何產生的--給孩子們 (How Electricity is produced - For Kids)

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    amytsai 發佈於 2021 年 01 月 14 日
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