Whatever i've learnt foor these past few months - dalilah

Hey..
So as promised..
Here it is..
But this is based on what i've written on my notepads ..
So here it goes:
This is based on what i revised too..

PN Junction Topic 8
* A diode consists of a PN junctions
* When a diode is forward biased,its forward resistance becomes very low.
*When a diode is reverse biased, current cannot flow through it because it has a very high resistance.
* The most widely used semiconductor material in electronic devices is silicons.
* A PN junction diode is used as a rectifier to convert ac current to dc current.
* The process of removing half the input of an sinusoidal signal through a diode to generate a dc level is known as half wave rectification.
*The bridge rectifier output produces a/an full wave pulsating waveform.
* Capacitor is an electronic components that is used to reduce ripple voltage in RC filter circuit.
*Zener diode is commonly used as a voltage regulator.
* A zener diode is reverse biased. When the reverse voltage reaches the breakdown voltage, its voltage will remain constant.
*The device that is used to clean the dust particles of air to prevent electrostatic discharge is known as ionizer.
*To discharge the ESD from the human body is by using a wrist-strap tied to earth or ground terminal.
*When a transistor is used as an open switch , it operates in the cut-off state or region.
* When a transistor is used as a closed switch , it operates in the saturation state or region.
* To turn on a silicon transistor , the VBE required is 0.7 V.
* To correctly bias a transistor as an amplifier , the emitter-base must be forward biased and the collector-base must be reverse biased.
Okay...
That's all for now...
Will update soon again..
But this is just part one of the notes... There's another 3 more pages to go..
=)
Have fun reading or going through it..

Hello

Hello!!
Sorry sorry...
Been trying to keep this blog alive!!
Well..

Dalilah here!!
I'm currently studying in electronics in ITE college East
And Farah is studying in Visual communications...in ITE Central..
So, i guess, i 'll be the one who will keep this blog alive.
Yikes!
Okays.
If i have enough time, i'll update whatever i learnt here ok..
So i've been planning to put tag boards and such but we'll see..
Ok..
Enough talks and have a nice day!

Different ways!

Hey guys!!

Dalilah here...

Guess that Farah never even update this blog, so i guess i'm the one who will keep making this blog alive!

Yup...

Sorry for not updating any information or whatsoever craps...

For your information, me and farah, had ended our secondary school life so i guess that we will be going to two different ways then!

Will miss all of my Science-mates and my EBS -Friends!!!

Arh!!

Oh well..

We can still keep in touch by phones, emails and letters..

Wondering ...

Should i keep my Science Notes??

I guess so!!

=D

Okay that's all update now!!

Bubbye!

Well, i'm going to post a video about water pollution next.

I know that its not in the syllabus but its under pollution right??
People, please do not pollute the water.

Well, i tried to embed the video but it does not seem to be able to used..

Never mind okay.

Maybe, if i have free time, i will try to upload.

Bubbbye!!!

Oh yeah!

Before i forget!

The other day, i was learning something about Petrochemicals!!

What is petrochemicals?

Petrochemicals are chemical products made up from petroleum..

Some chemical from petroleum get from fossil fuels and other natural resources.

Next, Air Pollution!!!

As you guys know that air pollution is bad for the environment so please, please,PLEASE don't pollute the air people!!

Always remember to recycle your trashes..

This can also help the environment!!!

Next, try not to use to much diesel oil as it contains some chemicals which is harmful to the environment.

(Air Pollution)

(Ozone Layer) (What if CFCs had not been regulated)

(Water Pollution)

(Global Warming)

Hey!

Okay!

Now i know where the tears from the eye came from..

Cool!!!

Oh My Gosh!

Prelims is getting nearer!!!

Oh man!

Science still yet to finish up revision!!!

Hmph!!!

Enjoy the video!!!

Maybe you guys will understand too....???

Where Tears Come From