Negative Resistance In NPN 2N2222A Transistor

This electronics video tutorial provides a basic introduction into the concept of negative resistance which is exhibited by devices such as the tunnel diode and the 2N2222A NPN transistor.
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[@boomerp.3652]

I love this guy and his one and only intro “in this video”

[@BrainPowerMath]

That's relatable

[@topz5703]

Although I neither study nor like electrical science, I really love your videos. THANK YOU SIR !! ❤

[@emadalqaqaa2666]

I believe whats happening is when you reverse bias the pn junction of the transistor, and when the electrical field around the depletion region of the pn junction increases to about 7 volts, what happens is a charge carrier movement across the pn junction allowing small current to flow, this current which flows through the resistor at the emitter causes a linear voltage drop across this resistor, and since its a small resistor compared to the resistance of the depletion region of the pn junction, the resistor drops a small amount of the voltage of Vb, and the rest is dropped over the transistor and that is what u r measuring, its not negative resistance, its basically when u increase the voltage, the stronger the electric field around the depletion region of the pn junction the more charge carriers cross the junction in form of current, the more current through the emitter resistor, the more voltage drop across it, the LESS voltage is left to be dropped over the transistor, and thats why it looks like negative resistance but its not. This is how i see it.

[@geedestin3389]

Have a good day man, needed this

[@angelina1312]

thank you so much sir! you are so helpful I am so grateful that you keep making videos

[@jameswonderlick7538]

Dude do more of these . With experiments.. this video is fantastic

[@fifaham]

Great work. May I recommend that we need to use constant voltage source to get more accurate results for such experiments - the reason for saying so is off the shelves batteries may not exhibit a "Constant Voltage" current source power supply. It is always great idea to have a bench type power supply with adjustable voltage and current sources at the output, this way we will be more professional at doing this. You may google the definition of Constant Voltage Current Source (CVCS) or CCVS. You have great collection of great videos and I thank you for all of your valuable work...

[@two_number_nines]

no. running it this way makes sure it wont blow up if for some reason it decides to drop its resistance to 20 ohms for whatever reason

[@magicianssciencelabandindu606]

Thanks ❤

[@ghuranjha9828]

Nice video ........

[@ornessarhithfaeron3576]

........

[@nasserBack]

I am about to finish the physical chemistry series. While it’s challenging, I think you could early make videos on all of the topics as an additional playlist. The videos out there aren’t the best and they aren’t as nearly good as your videos. Plus you will make tons of likes and subscribers especially those who struggled with it. I think you will enjoy it since you’re perfect at math. Just an advice from one of your fans.

[@rosie2081]

heyman

[@aduedc]

Here is a semiconductor physics explanation of this phenomenon. You basically created a tunnel diode in the Base region. As you increase the reverse bias you increase size of the depletion region to a point where the un-inverted region becomes so small that because of the quantum mechanical properties of electrons, and thin un-inverted region they can tunnel through the barrier. Do a search on tunnel diode oscillators ( reverse diode oscillators).

[@Night.02]

do anyone know what blackboard app are ''the organic chemistry tutor'' use

[@boghy1996]

i think he uses a tablet. If you go on his website (link in description), on "My youtube experiment", it shows what he uses

[@magnuswootton6181]

in a simpler way, simply voltage is negative resistance or "inverse resistance" in the way that if u have 2 batteries in series it cancels out the resistor inbetween and shorts get shorted away from!!!

[@DavijazzTV]

Pls what software did you use to make this video

[@fifaham]

You may use Easy Video (ezvid) - it is free to use but you need to familiarise on its controls

[@ingussilins6330]

Try made Oleg Lossev crystadine receiver with this transistor.

[@carultch]

I would still consider that positive resistance. V/I is still a positive number, even if dV/dI is a negative number.

[@monimonish302]

Bro actually I want to knw give detail explanation about negative resistance

[@ClaudeDufourmont]

Ca ne marche pas