measuring the energy of the very small

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4 жыл бұрын

An electron volt is a unit of energy, but how is it derived and determined?
In this video I quickly review how energy is increased in fields, starting with a familiar gravitational field situation and then discuss an electron in an electric field. Quickly discussing the mathematics involved in energy of the electron, I show that relationship between the joule and the electron volt.
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Пікірлер: 99

@nahiyanm225 2 жыл бұрын

The fact that you wore a shirt with mirrored writing on it is amazing attention to detail oh my Great video!

@abhinavgupta9638 2 жыл бұрын

no one here in India taught me this concept this clearly in my intermediate school (not even Unacademy JEE KZfaq channel). I'm in grade 12th & I love to watch your lecs for my exams. Thankyou so much sir...

@abhaykashyap4809 Жыл бұрын

Same 🙋😅

@MrAnthonyxyz 3 жыл бұрын

It's tragic that you don't have a bigger audience and more Patreon supporters. This channel has some of the best explanations I've seen.

@PhysicsHigh 3 жыл бұрын

Thanks George for your vote of support. Slowly growing. I do hope you can share to help me grow.

@michaelclarke5232 3 жыл бұрын

@@PhysicsHigh I agree. Your explanations are precise and easy to follow. Great work and please keep it up.

@PhysicsHigh 3 жыл бұрын

Thankyou.

@granny5652 2 жыл бұрын

.23 electrovolteos

@scienceislove2014 9 ай бұрын

My mind's blown away... Thanks a lot for this amazing explanation

@alexandrakemendy2793 2 жыл бұрын

Very clearly explained! Thanks!

@almirbravin1 4 жыл бұрын

Very elucidative, thanks

@antonbashkin6706 Жыл бұрын

Really wonderful thank you!

@harshpreetsingh1228 3 жыл бұрын

Nicely explained!

@officeforever 3 жыл бұрын

It was simple and helpful, thank you.

@PhysicsHigh 3 жыл бұрын

You’re welcome

@timmac700 3 жыл бұрын

Thanks Paul really helpful

@Aditya-ux7zu 2 жыл бұрын

such a flawless explanantion

@oonniiigg 3 жыл бұрын

excellent material Thank you Paul

@PhysicsHigh 3 жыл бұрын

thanks Gino

@eriknunezalbermann9993 Жыл бұрын

perfectly explained, thank you(:

@isaacmcadams8334 2 жыл бұрын

Thank you so much, starting out as a nuclear engineer and come from a very small school so I have to pick up a lot of things on my own. Very helpful!

@alfarabi4128 2 жыл бұрын

It was helpful; thank you very much

@bishalsarkar73 Жыл бұрын

great explanation

@mull5953 4 жыл бұрын

Great video

@PhysicsHigh 4 жыл бұрын

Thanks

@jose88eric 3 жыл бұрын

Amazing! Thanks

@rupalprajapati6827 3 жыл бұрын

Great sir

@satyamevjayate786 2 жыл бұрын

Well done

@Tay-ky3fi 3 жыл бұрын

Teacher: Okay so now I'm going to tell you what an electron volt is.. we start, of course, with an electron which is... Columb... Me: I think I need to go back to 4th grade

@malikyawarshafi1641 2 жыл бұрын

Very right bro and same here ..

@samruts5965 3 жыл бұрын

Yes it was helpful.... Thank you!!!

@angelineclarissa 3 жыл бұрын

Thankyou Sir! #RESPECT

@vedashreer5854 4 ай бұрын

very well explained

@PhysicsHigh 4 ай бұрын

Thanks

@fireball43 2 жыл бұрын

.23 electron volts

@maisan6234 2 жыл бұрын

amazing video

@PhysicsHigh Жыл бұрын

Thanks!

@disafear3674 3 жыл бұрын

Very helpful to a chemist who has forgotten all of his high school physics

@PhysicsHigh 3 жыл бұрын

Glad it helped

@willbyers47 3 жыл бұрын

Excellent💜🔥

@PhysicsHigh 3 жыл бұрын

Glad it helped

@rezalashani4005 Жыл бұрын

Hello thanks for clear explaining the eV. I have a question: you told (in 6':46") that by changing the distance between two plates the voltage changes but as I understand "V" is constant and "E" should change instead by changing "d". Am I right?

@tukendrakulkarni3849 3 жыл бұрын

best luck for your youtube career

@nidhishkumar8744 Жыл бұрын

helped me😀

@acluster3411 3 жыл бұрын

A perfect definition of voltage

@bapibiswas3501 3 жыл бұрын

THANK U

@russchadwell 2 жыл бұрын

Same set up done millions of miles away from any planet and the value of g found in mgh? In other words, we started by basically hanging an electron in a gravitational field and then built an electric field around it such that it lifted the electron. Had the electron been hanging in free space (no gravitational field to speak of) and then we moved the electron using the one volt set up, in the absence of the value of g this time, would the final value be much different? Would any difference be of comcern?

@edis9493 3 жыл бұрын

Thank you

@PhysicsHigh 3 жыл бұрын

Pleasure. Hope it helped

@BrianFedirko Жыл бұрын

W=FS is not taking into account the speed or acceleration of doing so to that point. the concept is missing the time domain...? am I correct in stating that?

@naminduyasanjith8111 3 жыл бұрын

Thanks

@Arshar 2 жыл бұрын

Camera behind glass and recording mirrored correct ?

@singh__n_s 2 жыл бұрын

Love from India🇮🇳

@moodleblitz 3 жыл бұрын

he is writing backwards... respect.

@stancartmankenny 3 жыл бұрын

Or the video is flipped, in which case his shirt must also be flipped. If he's righthanded, then the video must be flipped. Or maybe he's drawing on a mirror, but then, where is the camera?

@deeperlayer 3 жыл бұрын

@@stancartmankenny video flipped tshirt printed backwards for these videos

@int16_t 3 жыл бұрын

He's writing on a clear glass.

@deeperlayer 3 жыл бұрын

@@int16_t your are either indian, iranian or pakistani

@int16_t 3 жыл бұрын

@@deeperlayer How so?

@hamelillah7545 Жыл бұрын

the best 1ev

@WhydYouChangeMyHandle 2 жыл бұрын

So if it has to do with the energy needed to move the electron… if you have 0eV, does that mean the electron “moves freely” like in a metallic material?

@hizon525 Жыл бұрын

No, eV is just a way of expressing energy with relation to electrons If an electron (or any object with mass) is moving, it is experiencing kinetic energy. Also in a metal, there are charges from the positive metal ions, so there is still electrical fields

@WhydYouChangeMyHandle Жыл бұрын

@@hizon525 Hmm, okay. How would you best describe/characterize something with 0eV?

@hizon525 Жыл бұрын

@@WhydYouChangeMyHandle maybe a system with just one single charge? I would say it's better to think of eV as a unit for energy for things that are really small

@deadeye_john 3 жыл бұрын

Wait, does this also mean that one Joule is 1.6 10 to the 19th electron volts?

@TechnoSan09 3 жыл бұрын

It's (1÷1.6) ×10^19 eV

@satyamevjayate786 2 жыл бұрын

Yes

@stancartmankenny 3 жыл бұрын

I've heard electron volts also used to describe mass, e.g., when the higgs boson was discovered, they reported its mass in electron volts instead of, you know, metric tonnes. What is the reasoning behind that?

@PhysicsHigh 3 жыл бұрын

I have a video on that too. Check out kzfaq.info/get/bejne/qsxyZM52u5eooXU.html&feature=share

@stancartmankenny 3 жыл бұрын

@@PhysicsHigh funny... I guess you anticipated my question exactly, even down to the higgs boson question!

@muralidharareddy2096 2 жыл бұрын

One doubt!. 1ev is the amount of work done in moving 1 electron through a potential difference of 1v. But how much distance? Why distance was not mentioned?

@PhysicsHigh 2 жыл бұрын

Because distance changes the voltage. V=Ed

@muralidharareddy2096 2 жыл бұрын

@@PhysicsHigh let us suppose a fixed potential difference of 1v is applied between the two plates of distance d. Then move an electron in between these 2 plates of 1v fixed pd. Now you are doing work to move the electron in a potential difference of 1v= 1ev. But what about the distance d. Can it be any amount? Why d is not coming in to the picture here. It is only 1e and 1v pd.

@casualfreediving8780 2 жыл бұрын

@@muralidharareddy2096 I believe that the voltage is the potential energy difference (U = E/Q), so when the electron has moved over the distance in between it now has that much lower potential energy via U = E/Q, but that energy has now gone into kinetic energy so the electron have accelerated up to a certain velocity, so the final velocity is dependent on the voltage difference between the two points but independent of the actual distance in between. Edit: fixed some grammatical errors

@tashadurrahman 3 жыл бұрын

04:38 Why did you take the charge of electron as positive? Please answer my doubt

@TechnoSan09 3 жыл бұрын

Doesn't matter here

@devaroraa 2 жыл бұрын

We just need the magnitude

@kisho2679 11 ай бұрын

How much electronvolt eV is energy of suborbitals "s p d f" of atom?

@PhysicsHigh 11 ай бұрын

I don’t know because it varies for different atoms

@quantum-inc Жыл бұрын

irrespective of d between the conductive plates surfaces a charge o 1 volt is still one volt

@lonelyberg1808 2 жыл бұрын

.23 electron volt

@j7ndominica051 Жыл бұрын

This unit confused me. It sounds like a tiny fraction of a volt. Now is clear. How do people write on the screen? Do they mirror the picture including the shirt in this case? And how does the marker result in enough shadow to be captured on video?

@debasishnandi6545 2 жыл бұрын

Speciality of this video :-He is writing in reverse.

@PhysicsHigh 2 жыл бұрын

I did a lot of practice 🤓

@thevikingwarrior 11 ай бұрын

You do realise that as he is on the other side of that transperant screen; everything he is writting is backwards!

@ThysRoes 2 жыл бұрын

Why do electrons flow from positive to negative here? Don't the electrons want to flow from negative to positive?

@hizon525 Жыл бұрын

Electrical field lines go in opposite direction of electron. This is because we use conventional current in circuits ( + to - ) instead of electron flow ( - to + ), so we express field lines in the same way. This is just arbitrary. because in the past, when we didn’t know much about particles and were just figuring out circuitry , we used conventional current of + to -

@zulqarnaingama8415 2 жыл бұрын

Dear sir the force cant be equal to weight because you have to provide a force more than its weight to move the object in the opposite direction of its weight.