Transistor as an Amplifier | Electronics

Transistor as an Amplifier:
The major application of a transistor is as a current amplifier.
A transistor can be used to amplify ('magnify') current changes because a small change in base current produces a large change in collector current.
Transistor as an Amplifier | Electronics
Form 5 Physics KSSM Chapter 5 - Electronics
This video is created by course.onlinetuition.com.my/
More videos and free notes are available at spmphysics.onlinetuition.com.my/

[@rickyeo8752]

8:27 those are resistors right?

[@random-rj5vp]

I have always struggled to understand this concept on my own, and I'm so glad I found this video! Its amazing how you could explain it so well in such a short period of time thank you so much!

[@myhometuition]

Glad it was helpful!

[@nishanpaudel5876]

great explanation . Finally I got insight into the amplifiers. Thank you.

[@myhometuition]

You are welcome!

[@zetaconvex1987]

Excellent explanation. I learned a lot.

[@raymondgarafano8604]

So, the cap hooked to mike is an input coupling capacitor?

[@webmaster8925]

I have a confusion, this is killing me. If there is an AC current, direction of current changes. Then why forward bias is not converted into reverse bais?

[@dukunas6534]

great explanation
thanks a lot

[@amirgedon]

What transistor for piezo contact mic?

[@ltlt6117]

Hi i made a common emmiter amplifier for 200mhz signal with 2× gain
I can amplify a 50 mv p-p to 100mv p-p but I can't do it for 2v to 4v p-p
Why what values should be change???

[@mirajkhalid1771]

I am confused that amplify which current....?

[@goodw97]

During this whole amplification process, does the transistor should have enough voltage across the base to the emitter to keep it biased?

[@zzMeow583]

With all due respect, it is *incorrect* to say that "transistor is not voltage amplifier". In fact, transistor, in particular the Bipolar Junction Transistor(BJT), which is taught at SPM level, is indeed used as both current and voltage amplifier. At SPM level, it just covered the current applification process and its formula, which is the IC = (beta)*IB. The statement just said "The *main* application of a transistor is current application". Noticed the word "main". It does not say "The only application...".

[@VeryMuchBlessed]

Good video. Thanks much.

[@EZPlayer221mcpe]

But isnt earphone supposed to minimise the sound from the microphone?

[@nickrngaru6883]

Hie. Can i have ur pdf that you are using writen electronic 4

[@joetyler835]

So whats the function of the potential divider there ?

[@myhometuition]

Potential divider is used to control the ratio of the voltage across the collector and the base. For example, if the Rc = 50kΩ and Rb = 5kΩ, hence Rc:Rb = 10: 1. If the voltage across the two resistance is 11V, then Vc will be 10V and Vb will be 1V.
Note:
Rc = resistance across the collector circuit
Rb = resistance across the base circuit
Vc = voltage across the collector circuit
Vb = voltage across the base circuit

[@arashrkarimi]

What is the function of the battery and voltage divider? I’m confused how the transistor increases the amps? Where does it provide the extra amps? Please explain more the relationships between the battery, voltage divider and the microphone.

[@myhometuition]

The battery is the source of electrical energy. The electrical energy generate electromotive force. The electromotive create potential difference and hence drive the motion of the electrons in the circuit, and hence produce current. The potential divider control how much potential difference should be given to the output (the collector circuit) and the base circuit, and hence control the amplification factor.
For example, if the Rc = 50kΩ and Rb = 5kΩ, hence Rc:Rb = 10: 1. If the voltage across the two resistance is 11V, then Vc will be 10V and Vb will be 1V.

[@Owais-Ali]

I am trying to simulate it but it won't work. Can you help me out!! ☢☢

[@MHaad-go8zi]

For positive half cycle, why output voltage decrease and for negative half cycle why it increases??, plz tell me..

[@pasupathynatarajan3816]

Transistor is having phase reversal property i.e 180 degree so the output is decreases for + half and increases for - ve half

[@jamleckmatu374]

Which book is it please

[@subratabhuniya451]

That will two resistor not capacitor

[@saikiranreddy5919]

Nice

[@jimendimanulya9774]

good explanation

[@myhometuition]

Thanks and welcome

[@umeshmakwana3403]

Great

[@myhometuition]

thank you :)

[@nahone3145]

I like your accent dudee

[@marc4010]

Welcome to Malaysia

[@Kelvin-ed6ce]

a very confusing accent emotionally.

[@abduljalilrajper1664]

great work sir

[@myhometuition]

thanks :)

[@adzahojeremiahkofimawutor5685]

I like your video .please do you have electronic parts to supply me in Ghana

[@chukwubuikemgoodness1325]

Is not my video, but I can supply you electronic part from Alaba Lagos Nigeria. This is my WhatsApp number [phone]

[@rlinton123]

you use resistors not capacitors

[@myhometuition]

Yes, you are right. It was a mistake. Thank you for reminding.

[@FatymaZAli]

currenza

[@Dippa1991]

Can u plz do switch

[@faik_xdeditz3909]

Awesome 👍👍👍🔥

[@myhometuition]

Thanks ✌️

[@tharmakularajahtholeeshan3478]

Thanks

[@myhometuition]

Welcome :D

[@hustlaz2k]

8:25 obviously it is a resistors sir... i dont know if u really understand what u are teaching sir... it is super basic knowledge...

[@sarjeelrashid9602]

Same... I was questioning life at that point lol

[@kettleghost3721]

I actually want to die o_o

[@tintinfan007]

"Phoposhanol" 😂😂😂😂😂😂😂

[@tintinfan007]

"Khapastor" 😂😂😂😂😂😂😂

[@jayantachoudhury6404]

u r gadha. u will control current by using capacitor?

[@marcelojavier6292]

Chinese accent with wrong pronounciation!!!! Lol

[@surajkhose1861]

Great

[@myhometuition]

Thanks :)