Electric Charge and Electric Fields

What's the deal with electricity? Benjamin Franklin flies a kite one day and then all of a sudden you can charge your phone? There's a gap in conceptual understanding! Let's figure out what electricity is, exactly, and how it works, by defining electric charge and electric fields.
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[@xav5502]

thank you physics jesus

[@christelsinoy3824]

lmao

[@etherealbladerx8153]

😂❤ ahh hahaha 🤣 hehehehe tickled me

[@aspinning_fan_1796]

@@etherealbladerx8153 you what

[@chr0nically_onl1ne]

@@etherealbladerx8153 thats kinky 😦

[@etherealbladerx8153]

@@chr0nically_onl1ne it was funny 😆 lol

[@q8yMontages]

Me watching Professor Dave: In High school - "This guy is going over kid stuff, my syllabus is above this" *Clicks away* In University - "Whaat? I did not know that. Did he just summarize 3 lectures worth of material in less than 10 mins??"

[@LLL_14_85]

Really?

[@myvideosarefine]

Do you want advance concepts

[@e2hawk21]

this actually me XD

[@wissalkadri]

My professor took two hours and I don't understand a thing I watched 10 minutes of professor Dave and it's all clear now

[@omarnael5902]

facts

[@TechnoSan09]

A big topic in a nutshell

[@hanschrous1084]

In a nutsack

[@titancodm1098]

Kurzgesagt

[@Shatuu]

Professor Dave explained this 2-week topic in less than 10minutes. Bravo!!

[@LogosInsula]

It was for children,....

[@evayang8708]

Yet I'm still here😭@@LogosInsula

[@whitefeather8387]

Get lost he still taught everything that was needed​@LogosInsula

[@benas664]

I love how you explain these concepts. I have no idea what i am looking at when i see the formulas, but i understand how and why things work the way they do. You have a very good approach that should be appealing to the average person. I certainly learned quite a few things . Keep up the good work and good luck.

[@Liz-ye1qi]

He left a cliff hanger. He didn't explain electric potential :(

[@spacejunky4380]

Lol I understand the formulas, plug and chug. And I thought it was interesting how he mentioned it was similar to Newton's law of gravity which I noticed a while ago and drew a parallel to the weakness of the force compared to the kolumn law.

[@NoName-xf9nl]

@@spacejunky4380 ok

[@kirstenruiz5675]

❤❤😊

[@sunnykapoor141]

Ranbir kapoor is that you?

[@adsf.]

Funny that you are a Kapoor as well

[@Amna78903]

He is more handsome than Ranbir

[@royaaghbali9795]

I was having such a hard time grasping the concept of electric charges and electric fields, but you cleared it up so nicely, thank you so much Dave!!

[@yiannisserpico2646]

Each school should have such a physics teacher like you!!

[@jacobbaia6530]

Thank you so much I love what you are doing with the channel!

[@my-crazy-fantastic-fanatic]

I was having a really bad day.. till the opening kicked in!

[@roastfire7242]

luv your explanation

[@mayamugambuwa9326]

Hi I just wanted you to know that your question at the end was just IMPOSSIBLE TO ANSWER CUZ IT WAS TOO HARD!!!!

[@JeevanSamagar]

🔥🔥🔥 These fires came while listening 🎧....

[@AbhijeetGawas]

Today I Made my first video in physics... Hope u all like it. Just a first try

[@abd11jezabab83]

I liked it. Just continue Good luck 😁😁

[@AbhijeetGawas]

@@abd11jezabab83 thank u so much 😅

[@abd11jezabab83]

Just to now😇

[@alessandraolivieri6682]

0:47 THATS MY BOYFRIEND

[@Aliazyn_]

Why do rubbed ballon become negatively charged while hair positively charged, how that been determined?

[@Aliazyn_]

Ooo it because the balloon gained electron while hair lost electron, hehe got it

[@harikalatheeswaran9206]

Professor Dave ,I am an Indian and an IIT (Indian Institute of Technology, aspirant.There are two competitive exams one have to write to get a seat in prestigious IIT colleges.I checked all the viedeos in your channel.All the videos​ are related to IIT portions.I am really gonna tell all my friends who are also IIT aspirants. Thanks a lot professor Dave.All the concepts are beautifully explained.Keep going your doing great. Thanks a lot professor.Have a nice day.☺

[@ProfessorDaveExplains]

awesome, glad to be of help! please tell all your friends to subscribe :)

[@harikalatheeswaran9206]

Sure ,professor.I will tell all my friends to watch your video and subscribe.Thanks a lot.Have a nice day.🙂

[@peculiarlawrence5545]

Hari kalatheeswaran iin

[@bradenms]

AP Physics 2 test in 3 hours 🙏

[@DailyReds.365]

how'd it go?

[@techlife-101]

ALL THE BEST

[@bradenms]

@@DailyReds.365 well I didn't get to do any of the last 5 choose 2 questions, but I think I got a 3 maybe a 4 which is good considering my teacher doesn't understand the material herself and no one has ever gotten a 4/5 on physics 2 in her class

[@DailyReds.365]

@@bradenms that sounds really good! I've got my assessment on Wednesday now so I hope I can do well!

[@DougieBarclay]

that "checking comprehension" music was priceless

[@christyljude8137]

MY FAVORITE PROFESSOR! This guy literally just explained a three-day lecture in a 6:40 video. TT

[@Iman_1_4]

hey what did you major in?

[@abhijithmenon2513]

Sir, your classes are awesome and it helps me a as I'm preparing for my class 12 th final board examination. Thank you a lot and all my friends are watching your video and I'm from Kerala (INDIA).

[@Maxbronx4122]

So how did your exam go? Are you still studying?

[@abhijithmenon2513]

@@Maxbronx4122 I'm a medical student now

[@tellau]

@@abhijithmenon2513 woah that's great

[@Espectador666]

@@abhijithmenon2513 congrats man, good luck

[@isisrokicki451]

Idk why 173 people disliked. It doesn't hurt to learn these days kids be hella stupid

[@augustinegeorge633]

Your videos are really good sir. Really helped me understand the concept. Most other videos are just repeating definitions shown in textbooks.

[@goetiastories3850]

I love the comprehension part! t hank you for taking the time to make these beautiful videos

[@Zargham69]

kzbin.info/www/bejne/oqK4dXWAf7tkb7s

[@fikrukinfu7025]

I found it excellent for my grade 10 student daughters. Be blessed Professor.

[@tomisoetan9061]

For the checking comprehension exercise at the end, shouldn’t the force be negative because it’s between two protons and they’re both positively charged? Love the video by the way! It was helpful.

[@ProfessorDaveExplains]

the q terms include the sign, protons are positive so it's net positive!

[@ariaflame-au]

For electrostatic forces positive forces are pushing and negative forces are pulling, so the positive force has them pushing each other away. If it was negative then they would pull each other together. (Yes it's a little confusing that gravity doesn't do it that way)

[@AditiVerma-v4i]

Amazing reading skill 👏🏻❤

[@bruhhh69]

Man explains bad teachers' hours of letcure in literally 5 mins! Awesome 👍

[@OliviaRagland]

Omg bless you!! You have made me understand more in this video than 4 weeks of my physics 102 professors

[@Nebula2024]

Same here! 😄

[@achillesreyskens2774]

this is literally all of what i learned in a physics class in a month bruh.

[@shreyasingh8498]

Thank u sir

[@DepressedLemur9]

Yes, but what IS charge? What does charge mean? I know the protons are positively charged, but what does that mean precisely? Is it about energy? Why are electrons negatively charged? Can particles lose charge over time? Why is something charged by nature? Why is electron floating around nucleus? What keep it not stick to nucleus? Whats preventing it to fly away?

[@tonypitsacota2513]

I'm confused... I was taught that gravity, magnetism and electrical were 3 very different fields.

[@mirage8164]

Gravity is different but electricity and magnetism is the same thing. he brought up gravity because the two equations are very similar but its not the same force

[@frankyjayhay]

Word of warning: don't fly a kite with a wire in a thunderstorm and connect your phone to it, it'll be the wrong voltage and will damage your phone. Enjoy the video.

[@Both4567]

Nice sir

[@sannah1916]

I was studying maxwell's equations and forgot about the difference between electric fields and currents

[@BayanKawani.5]

الحمدلله

[@adhit528]

hello Prof Did you make any video about the relation between the time-varying electric field and the time-varying magnetic field? plzzzzzzzzzz Reply!

[@s.r.shoaib1171]

What will be the line of two negative charges?

[@Inicrafting]

Love your intro dude i been laughing so hard for the past hour

[@Raghav1205]

Really needed this , perfect timing . Thanks professor

[@Zargham69]

kzbin.info/www/bejne/oqK4dXWAf7tkb7s

[@Rudisbashar]

A story made to believe in a world made out of dust.

[@jacobunderwood4691]

Thanks Dave Grohl

[@JeevanSamagar]

I studied everything in my clg This like a revision tq

[@360wheelz5]

So you telling me the reaction force I experience standing on ground is actually the electric force between my feet and ground?

[@snewcomer6831]

I didnt understand that either

[@eshansyed9520]

What I understood is that gravity pulls us towards the center of the earth. At the same time, the particles in your feet and particles in the ground repel each other. The repulsion is electric force. The electric force is much bigger than the gravitational force, which is why we are not pulled into the Earth's core. I think that is what he was saying.

[@ivoryas1696]

@@eshansyed9520 Sounds about right. basically every force except gravity keeps you together with yourself and _away_ from other things (so that you don't just cold weld with everything you touch), and casually so, even against the pull of the earth.

[@veerrajuannamdevula9939]

Sir what happens when a neutral body is placed in electromagnetic fields?does it experience any force?

[@mohituniyal7]

when a neutral body is placed inside a electric field it faces one force in a direction due to positive charge and at the same time it experiences another force due to negative charge in opposite direction but of equal magnitude because it is a neutral body and consist of same number of electrons and protons.

[@kingshahzad78]

Hi Professor Dave, Your explanation very outstanding. I want to ask one question that is; IS POSSIBLE TO GENERATE ELECTRICITY IN THE WATER THROUGH THE ELECTRIC FIELDS GENERATED BY THE FISHES ?

[@ProfessorDaveExplains]

living organisms don't generate electric fields of any significance!

[@kingshahzad78]

According to my information through some reliable resources there are fishes which generate electric field in order to find their prey, path etc. These fishes are called ELECTROGENSIS

[@ProfessorDaveExplains]

oh yeah? interesting. the ocean has a fair amount of ions in solution, so i guess it's possible for a field to be sustained to some degree. crazy stuff!

[@kingshahzad78]

Can you help me in referring some resources concerning the development of an ELEMENT responsible for converting the ocean's ions energy into electricity ( even in mircovolts). I will be grateful if you sort out something.

[@ProfessorDaveExplains]

well if you mean a literal chemical element, that's not going to work, but beyond that ions themselves don't generate electricity, they just conduct electricity in solution. it is simply that electricity can propagate through electrolytic solution. so there is nothing to convert that i'm aware of. but snoop around, you never know!

[@maxutmansurov4307]

4:03, from a(?) electric field, it should be *an* electric field

[@naveen5126]

I cannot believe this man just taught a whole week worth of my syllabus in barely 10 minutes

[@diaverna]

Your videos go straight to the point and always carry me through exams. Appreciate everything!

[@BenjMondeloofficial]

Can you make Electric Flux, Gauss's Law and Electric potential

[@abhinavverma5834]

i also wants

[@mohituniyal7]

The number of electric field lines passing normally through a given area is called electric flux. Mathematically, it is defined as the product of electric field intensity with the normal area. Φ=E.A (E and A are vector quantities) Φ= EA cosθ

[@Adeptus_321]

You described the properties of electric charges and fields But you didn't say what they are.

[@KCKingcollin]

Technically the gravity equations can also be calculated to be repulsive, but they require a hypothetical negative energy that is not well understood yet

[@HuzaifaJawwadCreations]

Kooolaaamb's constant 😂

[@partypao]

charge = an atom right? because there can't be a 'positive' electron

[@ProfessorDaveExplains]

Well there are positrons. And protons.

[@carultch]

In most matter familiar to you, the electron is negative, and the proton is positive. The proton count defines the identity of the element, and is bound by nuclear forces to remain in the nucleus, while the electron is somewhat free to move between the atoms during chemical processes and during physical processes of electrically charging objects. An electron by definition is negative. There is such a thing as an otherwise-equivalent particle to the electron, that is called a positron, which is the antimatter counterpart to the electron. Antimatter may seem like science fiction, but it certainly is real, and has been produced in particle accelerators. Most matter familiar to you, will be made of protons, neutrons, and electrons. Antimatter is material that has positive equivalents of the electron, negative equivalents of the proton, and a counterpart to the neutron, and has very similar properties as its matter counterpart. The problem is, antimatter doesn't coexist well with ordinary matter, since when they contact each other, they will annihilate each other and emit gamma rays.

[@MasterAssassino1]

Question: Is the General Chem and Organic Chem all the videos you have for chemistry? Thank you..keep up the amazing work. Love your short and to the point videos!

[@ProfessorDaveExplains]

i also have an organic chemistry practice problems series, a little extra review! and i have a few more general chemistry saved up that i'll slowly release. but otherwise focusing on other subjects!

[@MasterAssassino1]

Thank you! Stay awesome

[@valestuffs]

Thnx Professor Dave,once again u saved my life 💙🙏

[@johnmcclelland649]

Professor Dave, what determines which of the 2 objects will be positively or negatively charged when rubbed together? eg balloon vs jumper

[@writerNB]

hello john: this is a good question. in video professor dave states: "all materials start in neutral state" (this is true ....mostly) some materials are more "radioactive" than others. what I think is happening is "materials" (lets stick with balloon-hair friction experiment) have different electrical "tendencies". hair of course is different structure to balloon. both materials are moving during "friction-event" professor dave states: "electric charge is displaced by rubbing these materials" (balloon hair) "displaced" means one thing now occupies location of previous thing. (this is not helpful).... what are these things? where are these locations? which thing is "displaced" by next thing? friction is actually a kinetic event. (because all material objects possess transferable energy). in some cases, this energy can be transferred easily. in others, energy cannot be released easily. professor dave is defining this energy release (here) as electron flow. (i think the electrons are gaining a negative charge during friction event). this is a guess. we cannot see electrons gaining a charge.... (if anyone gets this far, and says... sure we can see electrons gaining a charge, please let me know- i would be very interested in this data). (some electrical engineers question whether an electron actually exists). this is confusing. tesla called electron an electrostatic "shell". so...shells of force are being created during friction event (maybe). tesla tended to be very advanced in his understandings of electrical principles. we detect this shell-force as "electricity" - a flow of negatively charged electrons wants to go somewhere... where? maybe back to a neutral state... unless material remains radioactive (so some materials retain charge, some dissipate charge). peace: thanks for reading.

[@neiluncle1417]

@@writerNB wow u seem like a njce guy

[@sparemeyourrants]

Are things either a negative or positive always by nature? like the hair and balloon example, will hair always act as positive (electron donor) no matter what

[@vinuballagere4645]

Indian india Sup sir 👌👍👏

[@DavidWilliams-ps2rj]

Someone literally said '' physics jesus''

[@deepseacocoon]

"Let there be photons"

[@giulianomengoni6038]

Congratulations! You are a great teacher. I have a question, if I may ask (apologize my English): If protons (+) are stuck inside the core of the atom, and electrons (-) lay outside on circles, how can external (on circles) charges be positive ? How can electrons leave this circles to go on another one's atom if all external forces are negative (-), then rejecting forces? Thanks a lot

[@tellau]

ofc i'm not professor dave but i think you got a bit of it wrong here. yes indeed protons are in the centre of the atom but the charges on the surface can be positive not because protons are present on the surface, but because some of the electrons on the surface are lost. when electrons are lost, the material obviously becomes positively charged.

[@1minuteofmemes]

how did BEN FRANKLIN discover this phenomena with his bald head😂

[@zainabmehdi6380]

first of all real thanx sir for replying... so the clearcut statement wud be that ""shielding effect remains same from left to right across the period""... hope I got it right..

[@WahrheitMachtFrei.]

But what *IS* electric charge? What is it about a proton which *makes* it have this thing we call positive electric charge?

[@pebre79]

Great content. May i suggest reading less robotically and maybe smiling. Keep up the good work!

[@ProfessorDaveExplains]

No smiling in science! It's a very serious business! :)

[@saniazehra8845]

Sir it was a vey great video But i wanted to ask one question That why always electric field lines are directed outwards for positive charge and inwards for a negative charge?

[@lalankumar893]

Sania Zehra it's only a convention

[@mohituniyal7]

electric field lines are imaginary hypothetical lines which tells the magnitude and direction of electric field intensity at any point.

[@solapowsj25]

Force is a vector and it has direction. The direction of force in the field is indicated.

[@monishmishra6204]

Hey Wait What , We have learnt in our textbooks that coloumb's law is only applicable for point charges not objects..... Is There any update in this discovery , Does this law works for objects also from now onwards ???? ..... Please Reply

[@radinelaj-c7s]

Hello professor ,is me again. You are saying : the transfer of electrons from our hair to the balloon. Three question :1- why not the contrary( vice versa) ?( maybe from the balloon to our hair , why not?)is like two magnets attracting each other ,which of them is negatively charged ,which is positively charged ? Both them attract each other . 2- if there are transferred the electrons ,what happened the mass of the hair ? And mass of balloon ? Is it decreased ? Or is the mass of balloon increased ? ( or vice versa). Did you try it in vacuum chamber ?( where are not electrons , does it work in vacuum chamber ? )

[@prospernhema9645]

he looks a bit like the guy who plays the role of jesus in movies

[@pyrogrimm7653]

I thought he looked like that one guy from the recent predator movie. He's got the same facial hair I think.

[@95TurboSol]

Wait, is the electric field independent of particles? Or only around at point charges/particles?

[@gavinc8635]

Crazy that I learned more from a 7 min video than I have from past 4 50 min lectures at school.

[@guadalupec.1757]

Why is the 1.6×10^-19 in the numberator? How was both q1 and q2 identified? I know the basic electric charge is 1.6... but i still don't quite understand

[@goosee7776]

Means a internal magnetic field would haft over power 'the outer field,,, almost

[@isidoreaerys8745]

Wow stuff I had never learned before.

[@techlife-101]

Keep making quality content prof

[@Ghostify_]

My guy just saved me for tommorows physics quiz if I get over a 70 tmrw Im subbing

[@rajayazhini3897]

Why didn't hair become negative while rubbing and ballon become positive charge here.anyone tell me .bear with my poor physics knowledge

[@rolfbecker4512]

Excellent. Thank you so much. I will use it in my lectures.

[@kiberenigestsebez6633]

by far your explanation is better, but you did not explain well what charge is, you explained how charge came about - i.e. by rubbing hair with balloon and what it can do....,,, and you explained type of charges - negatively and positively charged ……. and you explained how this charge behave or what it can do i.e. repel or attract,,,,, then you explained where we find this charge or who carry this charge i.e. proton carry positive charge electron carry negative charge. etc... … and slightly you mentioned charge is electron property ,,,,,,,,,,, but why not it is also proton property ?...….can we say charge is a kind of force? as it can push or repel? or attract and hold?

[@ProfessorDaveExplains]

Check out my tutorial on quantum electrodynamics in my modern physics playlist.

[@ishankandari7849]

0:50 okay.. I got a doubt (it might be a silly one tho,,) So if the hair becomes positively charged then shouldnt it repel itself with the hair of the other side where the second balloon was rubbed??

[@johnpro2847]

That was well explained Dave & I understood it immediately ..the bit after "professor Dave again" was the hard part.

[@jpslmrn]

I don't get the 4:13. Does this mean the electric force helps you stick in the ground and balance? (like a lizard).

[@claudineamorpalad9779]

after this I am like: ooowww that's how it works!! fvck this complex modules!! I AM: SHOOKT

[@mihlalimrasi]

gotta love dave

[@jouryalrashidi8234]

i am a freshmen who did not know what was going on this entire semester and I see him #notgonnaabeahousewifebecauseofhim

[@NeonGreenT]

uh ? they dont manifest a magnetic field they disturb the magnetic field... same as waves dont manifest (exist) only the field is changing

[@zainabmehdi6380]

great tutorial...

[@Art_Calisthenics]

Hey sir you are from which country? -love from india

[@synergous571]

he is from the usa

[@kcg6024]

Where do you teach because I'm about to transfer to wherever that is lol

[@kritikasingh1291]

Ranbir kapoor

[@mazirabbasi]

It's a very bad video. You just explain what the formulae means rather what actually electric force, potential or the field means.

[@ProfessorDaveExplains]

Except that I absolutely did do that, so no.

[@khanhdan3007]

Thanks you!! It's so wonderful. Now i understand it. Say hi coming from Viet Nam

[@rossfriedman6570]

I don't understand why momentum is measured in watts but angular momentum "spin" is measured in joule seconds

[@Phymacss]

But why are the arrows going outward in positive charges and inward in negative ones?

[@abdullahtauhid1908]

I have a question. Can you determine the force between two charges with their relative charges, I mean like +1,-2 and so on? Or do we always have to use 1.6×10^-19?

[@emillsteenkamp2629]

This is probably the best video I've seen on the subject. Job well done.

[@ibtastico]

can you explain exactly WHY electrons have negative charge and WHY protrons have positive charge? What gives them these charges and why do we know that one is positive and the other is negative? I am really confused with this.

[@carultch]

The reason is history and convention. There is no reason the sign convention had to be assigned in this specific way, and it is completely arbitrary. It's just the happenstance of what Benjamin Franklin believed was happening, regarding which object gained material (became what he called, positively charged), and which object lost material (became what he called, negatively charged), when he produced electrically charged objects through the triboelectric effect. Unbeknownst to him, the reality was exactly the opposite of what he guessed. The electron is the charge carrier that is the most mobile, and the electron is what is exchanged between ordinary matter when macroscopic objects become charged. He didn't have the ability to know this at the time, and it wouldn't be until JJ Thompson discovered the electron about a century later, that we could know which sign of charge was actually being exchanged. Turned out to be the negative charge that is exchanged.

[@ahamedshahil4414]

Thanks man. I understood nothing studying 12th. But I do now.

[@TopG20073]

wait, I thought we will lose electrons and so the ballons will be positively charged