Introduction to Electric Fields

Рет қаралды 111,154

8 жыл бұрын

A simple and comprehensive introduction to electric fields. Covers the basics like the electric field of a charge, electric field lines and the electric field equation.
Hi! I'm Jade. I make fun physics videos that will make you smarter while making you smile :) Subscribe for new videos every second Thursday!
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So you put two positive charges together, and no surprise, they repel. Simple right? But WAIT! What IS that mysterious repelling force? Turns out it's the electric field.
All interactions between charges are because of their electric fields. But electric fields are not uniform, that is, they vary in strength depending on their distance from the charge. So how do we visually represent this? ELECTRIC FIELD LINES. Electric field lines give a visual representation of the varying strength of electric fields. They follow two simple conventions: 1 - field lines of positive charges point out, and field lines of negative charges point in - 2 - a high density of lines represents a strong electric field and low density of lines represents a weak electric field.
The definition of an electric field at a point is E = F/q where E is the electric field, F is the force felt by a test charge placed in the electric field and q is the magnitude of the test charge.
Thanks for watching!

Пікірлер: 212

@DanielInfrangible 4 жыл бұрын

So great! Thank you huge! Class overcomplicated something I was already comfortable with, and your video completely alleviated all the anxiety that I subsequently developed. Thanks thanks!

@mariateresaabanes5833 4 жыл бұрын

You make it sound so easy! This kind of delivery is really helpful esp.for students who will do much of their school work at home this school year. Thanks!

@claricehardman616 4 жыл бұрын

Really helpful, whenever I'm looking up a physics subject and I see you've covered it I'm sure to watch your video!

@athanb94 3 жыл бұрын

you have got to be the greatest physics teacher. simplified everything and now I understand thank you.

@simonmackenzie8571 8 жыл бұрын

Now I get electric fields!

@mojave7025 3 жыл бұрын

Finally a science channel with a good-looking narrator.

@kimiaandisheh9008 3 жыл бұрын

Generally speaking why does that matter

@customkittyliners 4 жыл бұрын

Awesome! Easy Explanation. Had no idea what electric fields were, now I do. Thanks

@cet_learning 7 жыл бұрын

Excellent presentation and communication technique. Refreshing and authentic. Well done and keep it up! :-)

@upandatom 7 жыл бұрын

Thank you very much! I'm glad you enjoyed it :)))

@dhrumilpatel7397 5 жыл бұрын

Your teaching style and your knowledge is very well and helpful

@mukeshchand5301 6 жыл бұрын

We take the direction of electric field lines away from the positive source charge because we take the test charge to be positive. But on the other hand, if we will take the test charge to be negative then we will take the direction of field lines towards the positive source charge. Am I right?

@hrck-qt7hn 6 жыл бұрын

The way you gave the charges name is wonderful, you got a new sub

@murthy2024 6 жыл бұрын

excellent. Today i am happy to have known what is electric field. Thanks sister.

@ananyaarun6354 3 жыл бұрын

Thank you very much for such a wonderful explanation!

@anysianas5099 3 жыл бұрын

You’re the best happy holiday you saved my semester

@jaycesuju 7 жыл бұрын

Thanks for the video. It's the easiest explanation that I found in youtube about the concept of electric fields. Keep it up ! Hope to see more videos from you soon 😊

@upandatom 7 жыл бұрын

+JLO ELF thank you :) I upload a video every second Thursday! Soon to be every Thursday. I have to ask about your youtube username? It is quite unusual :)

@Bandarr9000 6 жыл бұрын

I just discovered your channel, and it is so helpful.

@upandatom 6 жыл бұрын

I'm glad you find it helpful :)

@JackKirbyFan 7 жыл бұрын

Well done. So MANY videos are almost frenetic in their pace with a rapid chat and music video editing making it impossible to get anything out of it. This was the best explanation I have ever seen. My only request is that you might want to explain WHY fields came into play in the first place. That, to me, adds to understanding. Keep this up. you have a winner of an idea.

@upandatom 7 жыл бұрын

+Dave Fernandes thank you so much for the kind words :) Ok I'll take your advice on board and try to go more in depth in future videos :))))

@das250250 6 жыл бұрын

Do we know why fields exist or how they relate to spacetime in the beginning of the universe ? A) A few questions : does the electric field exist without any charge in the universe ? B) if the field exists in A how do we actually create charge ? C) without using circular arguments like charge is the force experienced inside an electric field , what actually is charge ?

@Skvijay260 5 жыл бұрын

Test cjarge in 12

@gabor6259 5 жыл бұрын

@@das250250 A) I don't think so but it doesn't matter. B) You can't create charge from nothing but a neutral neutron can split into a positive proton and a negative electron. C) We don't know what charge actually is.

@jillianepascual3586 5 жыл бұрын

This 7 minute video is equivalent to an hour in my physics class in school but here I understand everything and enjoy learning about it. I have a test in physics later so wish me luck 😂

@danielrai8991 2 жыл бұрын

I seriously thought I had a bad connection when she paused 😂😂, thanks for the great explanation

@enochbrown8178 2 жыл бұрын

Great introduction. Thank you!!!

@LeventAkbas 5 жыл бұрын

Great explanation, well done!

@dhruvaraveendra3774 4 жыл бұрын

Super helpful vid. Thanks a lot 😊

@sekarsankar7606 6 жыл бұрын

Your presentation is very cool, pleasant to watch. Long live your teaching...

@SagarKumar-vu8hu 5 жыл бұрын

Amazing.... class,fun n learn

@sunahangrai3601 Жыл бұрын

hello teacher ! how are the charges separated for practical purpose and what are their sources can you describe it ?

@arav9953 4 жыл бұрын

Perfect vid! Made it much more intuitive

@MrCardeso 6 жыл бұрын

Just love the Jade-splaining!

@upandatom 6 жыл бұрын

haha thank you!

@ilaila3504 7 жыл бұрын

i have something similar to mild dyspraxia and i'm also half deaf so my way of learning is really a bit unusual but easiest way to put is is I'm a very slow processor. There's something about the way you pronounce your words where you have little semi pauses between them that aren't normally there. For me, this is very nice because it gives my brain and ears quite a lot of help in processsing. I love your pictures and girly way of doing it, it really helps me :-)

@upandatom 7 жыл бұрын

I'm glad you found it helpful! My videos are also captioned if that helps too :)

@vishalprajapati823 6 жыл бұрын

simply brilliant thanx a lott!!!!!

@abuzaid2483 5 жыл бұрын

Fantastic and marvelous way of teaching mam

@JM-hu3pk 6 жыл бұрын

Hi, I loved your video. It really helped me understand electric fields more. I still have a question. How do you determine the direction of an electric field?

@Uri1000x1 4 жыл бұрын

She said what the convention for E field direct is.

@MasterIvo 3 жыл бұрын

I like how this video starts as it clearly states how little we know of the dielectric field as C. P. Steinmetz called it. Nikola Tesla was a specialist in this field, and found out that sudden disruptions, in other words, changes in the dielectric field strength, caused Longitudinal wave effects. I say effects, as he experimentally displayed these so called Radiant Energy effects. Tesla used High voltage DC fields which he discharged using opposite polarity voltage impulses, created by coil discharge inductive spikes. I am successfully researching this using my coil capacitor. more info on my channel

@hahaeggplanet12 7 жыл бұрын

I LOVED THIS

@upandatom 7 жыл бұрын

Why thank you very much rosebad4 :)

@brianfinnegan9700 5 жыл бұрын

Really clear, thank u

@ArvedRockt 3 жыл бұрын

Awesome video! I'll definitely recommend it to my students. One question: Is the Field-by-Lines analogy accurate? Like...is there a physical concept where there are...dunno...particles or something floating along these lines, or are fields rather a continuous space that maps positions to intensity and direction, that just happens to degrade with distance to the charge? Are fields a kinda non-dividable foundational concept of physics or is there something causing the fields?

@MasterIvo 3 жыл бұрын

These lines are real, an can be heard when a coil that moves through a strong magnetic field, is amplified. The crackling noise is due to the lines. these lines are called Faraday Tubes, by JJ Thomson (nobel prize for electron) in his book "electricity and matter" These magnetic and dielectric fields as C P. Steinmetz called them, are Aether fields. Aether can be seen as an ultra fine gas, much finer then Hydrogen. We still know very little of the Dielectric field, which can be experienced as the electro static field. Nikola Tesla was an expert in this field. He found out that when a high voltage field was suddenly disrupted, a longitudinal wave was produced. I am successfully researching this and open source it on my channel.

@suparnadatta3938 6 жыл бұрын

could you tell me that what is test charge and why test charge will be always positive charge?please tell me kindly

@qudanyun 5 жыл бұрын

Because it's the magnitude of the test charge, there is no negative magnitude.

@yushengtzou 2 жыл бұрын

Thanks a lot! 🙌🙏🌟

@kezhilvendhan4478 6 жыл бұрын

can u please explain me how a electron-electron repulsion take place ... i couldn't understand its field lines.... Answer me plz anyone..... Thnx

@audreyandremington5265 4 жыл бұрын

The field lines represent the direction a _positive_ charge would be pulled or pushed. Its just a convention. An electron is going to want to go in the _opposite_ direction than a proton would want to go (An electron wants to go towards a positive charge and away from a negative charge, while a proton would want to run away from another positive charge and go to a negative charge). Since electric field lines show us the direction of the force generated by a certain charge on a _positive_ charge, and since electrons are going to have force pushing or pulling them in the _opposite_ direction than a proton, *an electron always moves in the opposite direction of the field lines. * example: + charge (field lines point out, just like the force on another + charge is outward) But force on an electron is inwards, thus opposite the field lines.

@kezhilvendhan4478 4 жыл бұрын

@@audreyandremington5265 thank you

@niy._. Жыл бұрын

small correction at 1:25 saying charge doesnt have mass is misleading, as charge is always associated with mass as it is dependant on it. (positively charging an object makes it lose mass, and negatively charging it makes it gain mass, although negligible). a more accurate explanation would be the mass of these charged particles are so small that the effect of gravity is negligible and cannot cause them to be attracted to each other showing that another force is at play which can be either attractive or repulsive unlike gravity love your videos ♥♥

@IlIlIlIlIlIllIlIlI Жыл бұрын

Superb explanation 👍

@taif672 3 жыл бұрын

You are amazing thanks for helping 😭❤️

@goparajusambharaju676 7 жыл бұрын

hi! I like ur lesson very well I think this is useful for me

@philipholmes6886 8 жыл бұрын

You make physics so cool

@upandatom 8 жыл бұрын

thanks philip holmes :)

@keepthefaith9805 3 жыл бұрын

very helpful. thank you💝

@19tez87 8 жыл бұрын

Love it Jade

@upandatom 8 жыл бұрын

thanks Tezzie! xxx

@learningbasicconceptsofard2940 7 жыл бұрын

superb vedio !

@HilbertXVI 6 жыл бұрын

That was a really good explanation lol

@rudhrateja4967 4 жыл бұрын

All i want to know is which editing software u use

@sumanshrestha2654 7 жыл бұрын

hahah😀😀😀 pshycological force made me cry... i like your teaching wow style

@upandatom 7 жыл бұрын

+Suman Shrestha haha thank you :)

@azademu9515 6 жыл бұрын

It is very helpful for us.

@Chakoti 6 жыл бұрын

Good video..How about direction among negative charge..why they repel each other

@brianfinnegan9700 5 жыл бұрын

Yes I was thinking that

@quinndaly6258 4 жыл бұрын

Chakoti The field lines in the video indicate the direction of force if you place a positive charge in the field. If you were to place a negative charge in the field instead, you would simply flip the direction of all the arrows.

@srikanth9450 7 жыл бұрын

Its really worth watching even layman can understand. Hossssom!!!

@chiefdancingostriche 2 жыл бұрын

i'm just gonna be honest. you are very good looking. but your videos are very informative about science. i hope it's ok to watch and learn from them.

@ChicoMds 2 жыл бұрын

Thank you!

@bhavnamathur2343 6 жыл бұрын

it was great :)

@beshoysedkey4001 7 жыл бұрын

this is pretty cool , and can i know practical applicaations in this theme

@electromagic3111 6 жыл бұрын

Nice video you know you make physic lovly😉😙😗

@davidmlee3573 6 жыл бұрын

Thanks. Looking forward to more of your work. However, I agree with CGS. Did you not ask, "Why?" Why the positive-positive is repelled. I did not hear an answer. Please, do.

@TharinduIshara20 7 жыл бұрын

your presentation skills are so lovly

@upandatom 7 жыл бұрын

@AkashKumar-op5sd 6 жыл бұрын

Awesome mam

@hekk_tech5975 4 жыл бұрын

after such a nice vid my arrow is pointing definitely out!

@223adi 7 жыл бұрын

I am a student of commerce, I may not be able to solve problems, but I understood electric field so well that I can even explain to other students of science stream. #thanktoyou

@upandatom 7 жыл бұрын

+Aditya Parakh maybe you're a scientist deep down :) #mypleasure

@das250250 6 жыл бұрын

A few additions for this : Did we discuss where the concept of electric fields started historically because field theory expanded to describe far more than its beginnings i.e. All particles and force

@faizan17425 3 жыл бұрын

😂😂 the way you started I thought you really forgot the script

@mc4444 7 жыл бұрын

I liked the personified charges. Made me laugh for some reason :)

@upandatom 7 жыл бұрын

+Mc I'm glad you enjoyed it! I thought it was a bit risky but hey that's how we learn ;)

@nkgaming6374 6 жыл бұрын

It's very good

@Lucky10279 4 жыл бұрын

Upvoted just for naming the charges Beverly and Ethel instead of boring "q1" and "q2"

@adelasiri4001 7 жыл бұрын

It helped me a lot. thanks, super girl!

@upandatom 7 жыл бұрын

adel asiri no worries! I'm glad to help :)))

@sonalitandon9610 4 жыл бұрын

@@upandatom hi, i m from india where are you from?

@ab2e887 Жыл бұрын

Since F is the electrostatic force exerted on the test charge q by the electric field E (which is sourced by the initial charge) the electrostatic force that relates the electric field to the test charge should be the same force as that in Coulomb’s law since both equations include the force between two electric charges…one in terms of the magnitude of both charges (Coulombs law) and this one in terms of the electric field associated with one of the charges.

@jake_runs_the_world 7 жыл бұрын

Brilliant !

@upandatom 7 жыл бұрын

Thank you! :)))

@saikatme455 7 жыл бұрын

lovve your teaching

@upandatom 7 жыл бұрын

+saikat chakraborty thank you :)

@manoelnavas1991 4 жыл бұрын

Well, charges (electrons) do have mass...The gravity force, however, is way much weaker than the electric force. The dominant force between Beverly and Ethel is electric.

@MasterIvo 3 жыл бұрын

and that bound Mass is stored in the field as inertia

@79chrisward 7 жыл бұрын

Hi there - I have been doing a relativity course and taught that a magnetic field is not 'real' it's just an interpretation of an electric field due to the length contraction between electrons of either a magnetic substance or a metal carrying a charge. Do you have a video or insight on this?

@upandatom 7 жыл бұрын

Hi! Sorry I've never heard of that before. It sounds like it definitely could be possible though, as electric and magnetic fields are very closely related, often being induced by one another. Sorry I couldn't be more help!

@emmamay3820 6 жыл бұрын

+Rick D Here's a video that might help: kzfaq.info/get/bejne/Z7p7hsly0L27fmQ.html

@kasmaalhareer9470 6 жыл бұрын

thanks for the video but i want to ask you definition of an electric field due to coulomb's law

@mahimsd7645 4 жыл бұрын

What if I put 2 test charges and then measure the Electric Field???

@romelelectronics 5 жыл бұрын

thank you

@ilugolu1 7 жыл бұрын

I think that electric charge does have mass .... because I have studied somewhere that a mass can exist without a charge meaning it could be neutral but charge can not exist without mass because charge is present because of electron.. I mean deficiency or excess of electron and electron does have mass .. so tell me am u right or wrong ..it just a query ..thanks..

@upandatom 7 жыл бұрын

Hello, good question. Charge can be very confusing. I know in school you're used to hearing that an electron is a charge, but really, an electron is a particle with a charge attached to it. The particle is what has mass. You are right in saying that a charge can't exist without a mass, but that does not mean that the charge IS the mass.

@cajyfernandes6708 2 жыл бұрын

Nice video

@BoxerDogs 6 жыл бұрын

At 5:26, you have the positive charge moving towards the negative charge. I thought that it is always the negative that moves to the positive charge, e.g. in a simple circuit, the electrons leave the negative side of the battery, flows thru the wire, then flows into the positive end of the battery.

@Tantalus010 2 жыл бұрын

In reality, it _is_ negative charges that move because electrons are easier to move than protons. In theoretical explanations though, a single positive charge isn't necessarily one proton and a single negative charge isn't necessarily one electron. They're just nondescript charges of unknown mass, but known charge.

@user-eh7kk4tj4z Жыл бұрын

How do we use the formula ?

@roggerzyt7667 3 жыл бұрын

Thanks miss

@solapowsj25 4 жыл бұрын

The transverse sine EM wave forms photons in free space. In the good conductors for electric current, the optical density is higher than that of free space. Electrons form here. It's easier for the students to know electric properties of current flow. The subatomic properties will not make sense at this point. Mere geometry would show concentric circles in two perpendicular planes would crisscross to form 'trons' or cones of energy. Two cones form a sphere with its volume equal to the sum of the volume of each cone. That's easy to remember.

@sonalitandon9610 3 жыл бұрын

Hey thanks I understood it...sister

@sonalitandon9610 3 жыл бұрын

please tell ,where are you from

@FUAlexander2028 11 ай бұрын

I wonder when and if humanity will ever understand the actual nature of the phenomena underlying quantum mechanics.

@pinerobrando9689 4 жыл бұрын

have a video lecture on gaus’s law please..

@enaungong 2 жыл бұрын

Thanks

@woodysdrums8083 4 жыл бұрын

Why do two negative charges repel?

@thenightwhisper2872 7 жыл бұрын

thanks

@woodysdrums8083 4 жыл бұрын

The formula is similar to ohms law. As is when amperage is congruent to voltage.

@ahsanulkabir1182 7 жыл бұрын

Interesting video!!! Please upload something on electromagnetism!!! also B-H curve

@upandatom 7 жыл бұрын

+Ashan Kabir I'll do my best :)

@ahsanulkabir1182 7 жыл бұрын

Ashan or Ahsan...... My professor to you all has the same mistake!!! my crazy name!!!

@upandatom 7 жыл бұрын

+Ahsan Kabir haha sorry!

@soulcatch 6 жыл бұрын

You have gotten so much better at teaching since this video.

@manfatehsidhu7829 7 жыл бұрын

Please make a video on electric flux

@Uri1000x1 4 жыл бұрын

E appears to decrease with distance like other radial fields. E ~ to 1/(r^2).

@sunahangrai3601 Жыл бұрын

all video teachers take a pisitive and a negative charge but they even don't mention from where they're taken or separated ?

@ab2e887 Жыл бұрын

The basic premise is that all atoms that make up the periodical table are electrically neutral. However, if an external force (such as the chemical reaction inside of a battery or via magnetic induction in AC systems) performs work and causes the neutral atom to lose or gain an electron, the atom becomes negatively or positively charged (ion), respectively.