Electric Field (3 of 3) Calculating the Electric Field In Between Two Charges

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Explains how to calculate the electric field between two charges and the acceleration of a charge in the electric field. You can see a listing of all my videos at my website, www.stepbysteps...
An electric field is an area that surrounds an electric charge, and exerts force on other charges in the field, attracting or repelling them. Electric field is abbreviated as E-field. Electric fields are created by electric charges. The electric strength is defined as the number of newtons of force per coulomb of charge.
The SI unit for electric field strength is volt per meter (V/m) or Newtons per coulomb (N/C) is also used as a unit of electric field strength. On an atomic scale, the electric field is responsible for the attractive force between the atomic nucleus and electrons that holds atoms together, and the forces between atoms that cause chemical bonding. Electric fields and magnetic fields are both manifestations of the electromagnetic force, one of the four fundamental forces of nature.
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13 окт 2024

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Комментарии : 186

@na50r24 3 года назад

E2 should be: 3.75*10^6 Hence, the actual Etot (total electrical field at that point) = E1 + E2 = Etot 8.4375*10^7 + 0.375*10^7 = 8.8125*10^7 N/C. (Arsal Asghar already pointed out this mistake but I haven't found anyone who showed everything once again. So here you go.)

@tw3638 2 года назад

Thanks bc I thought I was trippin

@imstillaj 11 месяцев назад

thanks i was losing my mind

@nstar0203 10 лет назад

Once again, thank you for your wonderful explanations. You're helping me master topics which I've read over and over again, but just can't understand despite my efforts. I just love the way you're clarifying concepts... students sometimes can't even put their questions into words to ask the questions to begin with. So thank you..

@stepbystepscience 10 лет назад

Thank you for the nice comment.

@arsalasghar1095 10 лет назад

The answer should have been 3.75x10^6 N/C for E2. Can you please check that again maybe I'm wrong? Time: 5:12

@stepbystepscience 10 лет назад

Yes, you are right, sorry about that and thanks for checking and letting me know.

@arsalasghar1095 10 лет назад

no problem thanks for reply

@slopcrusher3482 4 года назад

thanks for commenting this, I got the same ( 3.75X10^6 N/C) for it and was super confused

@noahandrion7512 4 года назад

Arsal Asghar why became 10 raise 7 ??

@delxntv2946 4 года назад

Yea I was almost confused too

@knightlight1018 4 года назад

Hi man! I'm from Philippines , grade 12, and your tutorial really helped me thank you very much, you're a great teacher than my professor (not to be rude tho). THANK YOU VERY MUCH!

@stepbystepscience 4 года назад

Thanks for the positive comment

@YashSoni246 6 лет назад

Awesome video, will help me push through today's test. Maybe you can invest in one of the WIndows ink compatible 2in1 Laptops to make your videos much better.

@younicorn2977 2 года назад

Literally the best explanation possible

@stepbystepscience 2 года назад

Thanks so much, glad you think so!

@younicorn2977 2 года назад

@@stepbystepscience I have watched all your videos my maths marks are increasing thanks to you...🙂

@leahmuchindu561 3 года назад

This was very helpful, i watched all three videos and i totally understood, thank you!

@stepbystepscience 3 года назад

That's great, glad they helped!

@Giddyblack193 3 года назад

Thank you brother. Appreciate the work you're doing. God bless you 🙏

@stepbystepscience 3 года назад

My pleasure, best wishes to you.

@ananyamalaviya1297 8 лет назад

Very Helpful in solving problems with best explanation. Thank you so much for making this video.

@stepbystepscience 8 лет назад

You are very welcome. You can see a listing of all my videos at my website,www.stepbystepscience.com

@bendrew9698 3 года назад

Thank you so much man. U really helped me out with online learning being so stupid. Keep up the great work!

@stepbystepscience 3 года назад

Thanks so much, will do!

@ERTU758BJK 4 года назад

You are the best but we want Gauss’s Law videos!!!!

@stepbystepscience 4 года назад

I will put it on the list.

@aloziechibueze337 8 лет назад

All three videos on electric field were great, but please use a colored mouse pointer so we can see when you are specify details.Thank you.

@stepbystepscience 8 лет назад

+Alozie Chibueze Thanks the great comment, I never new that I could change the color of my mouse pointer, I'll look into it. You can see a listing of all my videos at my website, www.stepbystepscience.com

@prabinagurung9564 7 лет назад

value of E2 is wrong

@damoonsaieq7541 9 лет назад

thank uuuuuuuuuu soooooooooooooooooo much I was given this problem to solve but I was so dismayed that i couldn't understand anything.. but after watching this vid. everything got clear! thank u for saving my life !!! 😀😃

@stepbystepscience 9 лет назад

Damoon Saieq Excellent, glad that I could help out!

@matthewhill6949 8 лет назад

You sound like Vince Vaughn in Swingers. That's helping me get through this. Great video.

@stepbystepscience 8 лет назад

+Matthew Hill I get the Vince Vaugh thing one in a while, Sometimes Tom Hanks and Vin Diesel. Thanks for the comment. You can see a listing of all my videos at my website, www.stepbystepscience.com

@ashmitagurung8503 3 года назад

This video is really helpful thankyou so much sir

@stepbystepscience 3 года назад

Any time, you're very welcome!

@johndereksanglay4232 4 года назад

Sir, I have a question? What would be the direction on the vale of the acceleration?

@toms4669 7 лет назад

Hi, can you explain why when a particle is placed at the midpoint between the positive and negative charge, the resultant force is at a minimum?

@stepbystepscience 7 лет назад

By minimum do you mean zero? Because the opposing forces are equal.

@toms4669 7 лет назад

oh sorry I meant a particle with a positive charge, so it would be repelled by the positive side and attracted to the negative side. forces are in the same direction. but I don't understand why the force on the particle is at its lowest at the mid point

@stepbystepscience 7 лет назад

OK how about this?....by minimum I am assuming that you do not mean zero. It is at a minimum because the distance from each charge is the greatest. From coulomb law the force is inversely proportional to the square of the distance. So as the distance to one of the charges decreases, the force goes up exponentially. Try it out with some simple numbers. Make all three of the charges 2 C and the distance between the two outer charges could be 0.10 m. Leave k out. Put the charge right in the middle, calc the resultant force. Then move the charge over a few centimeters and calc the resultant force again. See what you get? Let me know

@fries8769 4 года назад

Hey, i just want to ask, how about four point charges with equal distance and then you need to get the half eay point of 2 charges, does the the other charge will affect the other point or I will just disregard the other points and proceed to what the vid do?

@mivapusa 6 лет назад

Is there a method for calculating the electric field between those two particles if one starts moving away from the other at a constant velocity?

@criscruz4919 5 лет назад

Hi! I just want to ask, what if the electric fields are pointing to opposite directions?

@stepbystepscience 5 лет назад

Same process just be careful what you determine to be negative and positive direction.

@sahilrastogi9750 7 лет назад

what will the result be if u put a -ve charge of same magnitude as that of test charge b/w the other two charges ?

@jammelabrahamrico1339 4 года назад

Thank goodness I found this channel! Thank youuuu! 😍

@jammelabrahamrico1339 4 года назад

Do you have more sample problems?

@stutch4048 4 года назад

Thanks for the explanation! very helpful

@stepbystepscience 4 года назад

You are very welcome!

@misoanty Год назад

Hi, I don't know if you still check the comments, but if you do, great Do you know any formula I can use to calculate the electric field between two charges without knowing the value of d1 and d2 (the distance between each charge relative to P), I only have the value of the two charges (Q1 = 6 * 10^(-9)C, Q2 = -9 * 10^(-9)C), the distance between the charges (r = 0.04m) and ofc the coulumb's constant If you read this please, please help me lol

@stepbystepscience Год назад

No, sorry

@andrewsilva5202 7 лет назад

it should be in negative answer right? cause the direction of the electric field towards to the left so E total would be -E1-E2?

@testchannel7747 7 лет назад

Thank you for the amazing video! :D I was wondering, if the proton was not a proton, but something with more or less charge. For example a particle with charge of 3 C, would we then have to change the value of the electric field, before we use Newton's seccond law? Because the electric field is defined per unit charge, so it we have a charge of +3, would we have to triple the value of the field?

@stepbystepscience 7 лет назад

No, the electric field strength would still be the same, the force would be different the the amount of charge would be different.

@hagenimanagilbert7860 3 года назад

Thank you Sir! Thought the calculations came up with some errors.

@Waspnest345 5 лет назад

Isn't that second electric field is 3.75*10^6 and also mass of electron is 9.10*10^-31?? I am little confused that. Book says mass of the electron is 9.10*10^-31. Please correct me If I am wrong. Thank you!

@stepbystepscience 5 лет назад

I think the problem you are referring to is the acceleration of a proton and the mass of the proton is 1,76 x 10-27.

@dzzhere 9 лет назад

Both tutorials are very helpful

@stepbystepscience 9 лет назад

@Raymar Bowen, than thank you twice!….and Go Niners!!!

@dzzhere 9 лет назад

Nooooooooo! lol

@simyongsiang5606 9 лет назад

Assuming there are two negative charges P and Q with no charge between them and the distance between them is 3 meter. If you were ask to find the magnitude and direction of the electric field of P due to Q, are you suppose to find P or Q?

@Asra_Fareed 3 года назад

Thank you so Much. It was so beautifully and simply explained 😍😍. Just know that ur vids really helped someone in the world. And this person really appreciates it 🤗!!

@stepbystepscience 3 года назад

My pleasure, thanks for letting me know 😊

@Asra_Fareed 3 года назад

I would however love to know why do we always ignore the negative sign when we substitutes the values of charges (even when its a negative) Because isnt the negative tell us that there are more electrons than protons thus its Negatively Charged, yet we ignore this fact when doing the calculations... Why?

@stepbystepscience 3 года назад

@@Asra_Fareed Good question. Because the electric field strength is a vector quantity, there are two parts to describing it; the direction and the magnitude. The negative and positive signs are used to determine the direction of the field at a given location, but when we calculate the magnitude of the field we leave the signs off the charges. Does that help?

@Asra_Fareed 3 года назад

@@stepbystepscience Ohh, i think im understanding 🤗But wait, when we do that aren't we changing the value of a charge, coz negative is completely different to positive?

@stepbystepscience 3 года назад

@@Asra_Fareed You are multiplying so no.

@andremekraju5924 3 года назад

Hi there... What if p has a charge on it?

@stepbystepscience 3 года назад

Then there is still the same field strength at that point p, but then you can calculate the amount of force on the charge at point P. The field strength is not effected by the charge at point p. Does that help?

@andremekraju5924 3 года назад

@@stepbystepscience yes, thank you!

@tammietrinh6877 7 лет назад

Hi I thought we would use for mass as 9.11 * 10^-31 kg (electrons), but why did you use 1.67*10^-27 kg (proton) instead?

@stepbystepscience 7 лет назад

tammie Trinh 9.11......is the mass for an electron. The problem says that it is a Proton.

@tammietrinh6877 7 лет назад

Hi thank you for the reply! Are we supposed to use the mass for electrons or protons? Because in the above, you used the mass of electrons? But in some examples I've been seeing, they have been using mass of electrons to find acceleration of electric field..

@stepbystepscience 7 лет назад

You are not finding the acceleration of the electric field, you are finding the acceleration of a particle in the electric field. Therefore you use the mass of the particle.

@tammietrinh6877 7 лет назад

thank you so much! thumbs up!

@phenomenalkasey Год назад

Please what should you do if only the distance between the two charges is given?

@Kimberlyelayyne 8 лет назад

also for the problem I got for E2, 3.75 x 10^7 n/c. where did I go wrong in my calculation? :)

@stepbystepscience 8 лет назад

+kimberly mund You are right. I made the correction/note on the video, but if you are watching on a mobile device maybe it does not show up.

@ljmclaws2122 6 лет назад

you are close, E2= 3.75*10^6 or (3.75E6)N/C

@tammybush3162 8 лет назад

Super helpful! Thank you for making this video!

@stepbystepscience 8 лет назад

+Tammy Bush You are very welcome, You can see a listing of all my videos at my website,www.stepbystepscience.com

@onaleronaleeme8957 7 лет назад

thank you the video was very helpful

@animefreakkk100 6 лет назад

THANK YOU SO MUCH!!! HELPED ME SO MUCH. GOD BLESS YOU

@spaaaaace8952 7 лет назад

Thank you for the superb lesson!

@blackunknown7404 9 лет назад

Very helpful, thanks!

@jenniferbranagan 5 лет назад

Another great video. Thanks for the help =)

@stepbystepscience 5 лет назад

You are very welcome, thanks for the comments.

@guruprasad1475962 9 лет назад

so the acceleration is about 8.45*10^15 m/s. thanks again!

@vikaspulluru1211 8 лет назад

Videos are amazing, thank you!

@noname-yv3ov 5 лет назад

two charges 2 × 10^-6c and 1×10^-6 C are placed at a separation of 10 centimetre .where should a third charge be placed such that it experiences no net force due to these charges? Ye questions btae

@cybergamer6306 6 лет назад

Thanks man very helpful

@stepbystepscience 6 лет назад

you are very welcome.

@abdul_wahhab 9 лет назад

I want to ask how you calculated E2 at 5:10, how comes the answer is 1.0 x 10^7 N/C ???

@stepbystepscience 9 лет назад

Abdul Wahhab Yes, you are right the answer for E2 is 3.75 x 10^6 N/C. Thanks for the comment, I made some notations on the video.

@abdul_wahhab 9 лет назад

Brian Swarthout you got one like and one subscribe from me :) Thanks

@afiacco9155 9 лет назад

thank you, keep up the good work.

@stepbystepscience 9 лет назад

A Fiacco You are very welcome, I am trying! Thanks for the comment.

@3hunna123 8 лет назад

do you have a vid for solving the electric field for 2d charges like charges not in a straight line

@stepbystepscience 8 лет назад

+hunna fiddy I have this one for charges in a triangle but I still need make one for charges in a right angle. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-AiwmQNBzC4g.html. You can see a listing of all my videos at my website, www.stepbystepscience.com

@loglmk 5 лет назад

Very helpful thank you!

@بنتِوحید 2 года назад

very helpful ❤️

@stepbystepscience 2 года назад

Thanks, glad you think so!

@vlademiramores3705 3 года назад

Thank you very much, 😍

@stepbystepscience 3 года назад

You're very welcome 😊

@junioraugustoperez6212 8 лет назад

what if we have both negaive charge?? should i subtract E2 to E1?

@stepbystepscience 8 лет назад

+Junior Augusto Perez Yes. You can see a listing of all my videos at my website, www.stepbystepscience.com

@junioraugustoperez6212 8 лет назад

i'm doing my research work with tons of physics calculations. and I'm really having trouble finding examples that matches my questions.

@stepbystepscience 10 лет назад

The electric field is so interesting?!?!?!?

@chucksgaming9071 Год назад

No, because I cannot use it when I become a politician and steal money

@Sanju9111 4 года назад

This is great !

@stepbystepscience 4 года назад

Thanks

@astudy5452 4 года назад

So much good Nice 👍🏻thumbs up

@stepbystepscience 4 года назад

Thank you! Cheers!

@zishanahmed4349 2 года назад

What if the p point in left from both Q1 and Q2?

@stepbystepscience 2 года назад

Basically it is the same thing. You have to evaluate the direction of the field from each charge, whether it is positive or negative and then use the equation to calculate the magnitude of the field strength.

@pochietabat7547 9 лет назад

what if im solving for the magnitude of a charge?

@lifeintechnicolorii4715 8 лет назад

this helped so much thanks!

@stepbystepscience 8 лет назад

Awesome, thanks for letting me know. You can see a listing of all my videos at my website, www.stepbystepscience.com

@ryansanchez1230 3 года назад

How do we know it's 10 to the 7th? How is that part determined

@zacharyburden834 9 лет назад

Very helpful

@stepbystepscience 9 лет назад

Zachary Burden Thank you very much for commenting.

@raeh9131 3 года назад

Thank you,

@stepbystepscience 3 года назад

You bet!

@kylieamor711 6 лет назад

is magnitude the same as strength?

@stepbystepscience 6 лет назад

Kylie A. I would day so.

@lunosol8914 7 лет назад

Where did you get (0.04m) from

@jackykwok3382 3 года назад

How about the force at that midpoint?

@TheBeginningOfWisdomPodcast 9 лет назад

thank you very helpful

@stepbystepscience 9 лет назад

Jonathan Aleman You are very welcome, thank you for commenting.

@abdulraf1414 5 лет назад

i enjoyed reading this

@stepbystepscience 5 лет назад

Thank you for commenting

@saunakroy2587 7 лет назад

best lecture

@stepbystepscience 7 лет назад

Thanks nice of you to say so.

@madhusudhanan9278 7 лет назад

u substituted 15 for Q in the formula. Why did not u substitute 6? I'm really confused. Please help. Time 3:33

@stepbystepscience 7 лет назад

We are calculating E1, the electric field for charge 1 (Q1). Therfore we have to use the charge of Q1, -15 microcoulombs. That is it. Does that help?

@madhusudhanan9278 7 лет назад

Step-by-Step Science ohhh yeah. I got it. thank a lot man appreciate it. keep it up. I'll subscribe to rn.....😉😎😎

@wafaaahmed7386 5 лет назад

Thanks ❤❤❤

@stepbystepscience 5 лет назад

You are very welcome and thanks for the comment.

@connorrobertson6599 6 лет назад

Helpful Thanks

@stepbystepscience 6 лет назад

Thanks for the comment.

@danielkwon3062 7 лет назад

if Q1 is -15 uC, why do we not put - in the equation?

@stepbystepscience 7 лет назад

You may want to use the minus sign to determine the direction of the field but....that is not how you should do it. The direction of the field is first determined by the direction on the force on the positive test charge. The magnitude of the field is then calculated using the magnitudes (without the signs) of the charges. If there is more then one charge then add all the magnitudes together. Minus if they point to the left and positive if they point to the right. Does that help?

@danielkwon3062 7 лет назад

wow.... thank you very much!!! Now I fully understand Thank you!

@lxlxleech 7 лет назад

what if P is at an angle rather than being in line with the charges??

@stepbystepscience 7 лет назад

Then you may have to use a little trig and add some vectors. I have videos like that for the Coulomb force but not for the electric field. You can see a listing of all my videos at www.stepbystepscience.com

@libansvlogs2693 7 лет назад

thank you so much

@stepbystepscience 7 лет назад

You are very welcome.

@elicytrynbaum2969 4 года назад

thank you!

@maharlikacamama9874 2 года назад

The E of 2nd point charge is not 1

@PushpalathaSuresh-ek6rv 5 месяцев назад

True

@tsehayenegash8394 3 года назад

how the electric field (E2) is the left

@dakshatpatil4141 4 года назад

Thank you sir

@stepbystepscience 4 года назад

All the best and thanks for the comment.

@nidaaa7714 6 лет назад

thanks

@OperationRevelation 2 года назад

E2 is wrong. It should be 0.375x10^7

@danieltomasello191 8 лет назад

The charge of a proton is equal to an electron but has a opposite sign

@stepbystepscience 8 лет назад

Think so, you can see a listing of all my videos at my website, www.stepbystepscience.com

@nlo114 5 лет назад

Please issue new vid with all the edits and corrections done. Trying to get my head around this when the audio and visual information is wrong just creates confusion.

@stepbystepscience 5 лет назад

Is it really that bad?

@nlo114 5 лет назад

@@stepbystepscience - I was struggling with the onscreen corrections mixed with the audio. When I see something written then amended by brain starts to seize up! :-)

@abdullah1885 9 лет назад

good

@joelutz2372 9 лет назад

Thanks, you sound like Vince Vaughn lol

@stepbystepscience 9 лет назад

+Joey Lutz Funny, you are not the first person to mention that. Some people say Vin Diesel.

@Kimberlyelayyne 8 лет назад

marry me! hahaha you are so incredibly helpful! !!!

@stepbystepscience 8 лет назад

+kimberly mund Sorry already married. You can a listing of all my videos from my website, www.stepbystepscience.com

@mexalcorta 9 лет назад

you sound like Vince Vaughn lol but thanks!

@stepbystepscience 9 лет назад

Cris Alcorta No problem, that is a common comment about my voice.

@xiuxiu1108 8 лет назад

Excuse me, but why don't you use unit vectors in your calculations? I'm only asking because I get so confused using you method of imagining the direction of electric field first. I guess I just learn better in mathematical terms.

@stepbystepscience 8 лет назад

Does not seem necessary at this point. You can see a listing of all my videos at my website, www.stepbystepscience.com

@stephensonmquaye1817 7 лет назад

can you please help me solve this problems ... (1) three charges q1=2uc, q2=3uc and q3=6uc lie on the x - axis at x= 2m, x=-2m and x=0m respectively. what I'd the net electric force on each charge?