Output characteristics of NPN transistor | Class 12 (India) | Physics | Khan Academy

Let's explore the behaviour of output current (collector current Ic) as the output voltage (Vce) is changed in an NPN transistor.
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Created by Mahesh Shenoy

[KhanAcademyIndiaEnglish]

Hey, here's a dedicated CBSE course on our website where you can practice all the concepts related to this video and more. And oh, it's always free.

[radioactiveelement]

I was living with a doubt for 5 long years then tonight I watched this video. Thank you so much 💜👍

[zizo-veib]

This video is amazing but ' these are only in the engineering domains we don't have to worry about them at all ' kinda makes me sad as an engineering student 🥺, it's not easy to find such high quality videos, so I'd really appreciate it and give my support if you'd be willing to do videos for engineers as well 🙏

[mkphysicspassion]

Undoubtely best explanation present on you tube thanks

[snoobeagle]

This answered some ambiguity that my textbook (Floyd) caused. Thank you!

[anindyasikdar]

Ah! Sir, thanks from the depth of my heart! I finally understood it nicely.

[hardiksingh]

Thanks Khan academy for such a wonderful playlist

[niranjan]

Sir, at 02:11
You mentioned that regardless of the value of the Output Voltage, the Output Current is almost the same. But we've seen that the Base - Collector Junction is getting reverse biased. And in a reverse bias, the current is almost the same even if we increase the voltage. But there is a "Breakdown Voltage", right. So what happens if the Output voltage goes beyond the Breakdown Voltage? Will the engineers make sure that this scenario doesn't occur? Else everything will be wasted, right?

[miraculous_opal]

Thankyou sir 🙏🏻 it is very helpful to us

[NA-wubj]

Shouldnt the curves go slightly upwards to the right considering youre using a common emitter configuration not a common base configuration?

[aishwaryajee]

That was a very nice explanation, thanks for that, but I still have one doubt: where would the saturated region be?
Please explain that where and why should the saturated region be?

[adilfaiz]

Nice video.
Is there a mistake in explanation when the Vce was reduced to 0.3 v ?
I am not sure. Please check.

[neoanderson]

Excuse me sir, by equation when transistor become saturation legion Vce become smaller Ic become bigger. that why I so confuse by the grape when Vce become smaller then Ic become smaller too. so what is the misunderstanding... ?

[KrishnaKumar-omhv]

What happens when Vce gets equal to Vbe, shouldn't the current IC drops to zero ? As collector base junction would be zero biased ?

[gokuleshgopa]

Since the base current is to be kept constant, if we increase the collector-emitter voltage the base current would decrease somewhat, so to keep it constant we would have to increase base-emitter voltage. Won't doing this forward bias the collector-base junction at some point?

[jrsolomon]

I wish my lecturer can explain like this...

[pardeepgill]

thank u soo much for providing the reason behind such curve fashion. Searched many videos all provided only formulas not the concept.👍👍

[PriyaSharma-tzlh]

Very nicely explained...my concepts on this are cleared.
Thankyou so much

[pallavsaha]

Hello Mahesh Sir I have a why does the input characteristics graph does not have current plotted in the negative y-Axis ?? because here we can see that the direction of current is in the wire connecting the emitter and the base is from low potential i.e. from the emitter to the high potential i.e. to the base

[markfinn]

Does the collector voltage have to be more positive than the base voltage? (For the transistor to conduct)