6:00 - 6:04 By the right hand rule, you use the same direction for current and say that one is going into the page and the other field is going out of the page, but your fingers are pointing out of the page for both lines yet the claim is that the first field vector goes out of the page while the field vector for the second current goes into the page. Why does the right hand rule look the same for both?
Michael Hixson Its because of the position at which hes trying to work out the field. Because he's taking the point in the middle, if you think about the left wire, as he curls his hand, the fingers on the right hand side of the wire a coming out of the page. Whereas if you look at the right wire, the point is now to the left of the wire so you can see the base of his fingers are going into the page. Like if you were to draw the mag field as a circle, then at one side of the circle you'd have the arrows pointing out the page and on the other the arrows would point in. Basically its because the midpoint between the two wires is to the right of the first wire and to the left of the second if that makes sense. Just look more closely at how his fingers are curled and you should see it :)
Depends on the perspective in viewing, im confused really at first. But when i tried it you should learn where is the field going in the page while the other out of page. In right hand rule, direction is counter clockwise when facing north electric current but if you view it in different angles, it may look clockwise too but based it on the front side of the wire and you will get it. Just sharing
My teacher taught us with a very similar method but I couldn't get a thing. Thank you very much with the help of this video I feel like I can answer every single question my teacher gonna ask me
because the magnetic field is going into the page on each wires left side, and out of the page on each wires right side. so in the middle, you have one of the left and one on the right
In your last example with the two wires, one going into the page and one coming out of the page, why would they repel each other. using the right hand rule, I get the force generated by the mag field at one wire, by the other wire, is toward the wire creating that mag field. Would that not mean attractive??
Hi Thanks for the video. I have a question. We have a length of wire connected as a loop in series to the secondary of a current injection transformer. So the current shall be travelling through two parallel wires in opposite direction (from transformer to wire and back to transformer). Can we deduce the magnitude of magnetic field around the two wires?
Legend has it you're still waiting on an answer 😂 The second video is available (youtube sometimes removes links in comments, so I I'll link to it in a separate reply), but it's there. Anyway, he continues the problem and, no, you use sin theta (not cosine) and with some cool trig/algebra and substitution, basically theta goes away and you don't even have to worry about the angle any more.
For the field between 2 wires in the same direction at 6.43 : Is I one the greater magnitude? rather, how does one differentiate between the I1 and I 2 for subtraction purposes?
Why has every example on youtube or other source use the magical scenario where all components cancel out except for one? If the point isn't in the center of the two, what then?
Unless the problem states that you should, it's pointless. In some labs you can take that into account and try to angle whatever apparatus you are using a certain amount to have it line up with the magnetic field the apparatus is creating. That way you can add up the fields, but yeah the earth's magnetic field is relatively small to most of what you will work with in problems or labs.
thanks man...you teach better than any of my teachers(no disrespect to them), you'r awesome
6:00 - 6:04 By the right hand rule, you use the same direction for current and say that one is going into the page and the other field is going out of the page, but your fingers are pointing out of the page for both lines yet the claim is that the first field vector goes out of the page while the field vector for the second current goes into the page. Why does the right hand rule look the same for both?
Michael Hixson Its because of the position at which hes trying to work out the field. Because he's taking the point in the middle, if you think about the left wire, as he curls his hand, the fingers on the right hand side of the wire a coming out of the page. Whereas if you look at the right wire, the point is now to the left of the wire so you can see the base of his fingers are going into the page. Like if you were to draw the mag field as a circle, then at one side of the circle you'd have the arrows pointing out the page and on the other the arrows would point in.
Basically its because the midpoint between the two wires is to the right of the first wire and to the left of the second if that makes sense. Just look more closely at how his fingers are curled and you should see it :)
Michael Hixson that was a good question, thought the same. Thanks
Depends on the perspective in viewing, im confused really at first. But when i tried it you should learn where is the field going in the page while the other out of page. In right hand rule, direction is counter clockwise when facing north electric current but if you view it in different angles, it may look clockwise too but based it on the front side of the wire and you will get it. Just sharing
at 5:00 or 5:01 shouldn't the equation be B=mu naught * I_1/2pi(2d) + mu naught * I_2 / 2pi(d)...? Please correct me if I'm wrong.
I also think that is 2pid for the second current
Stewart Brown I think so too
Both the vectors are in same direction.. so plus mu naught
I was just about to ask that, and I think you are correct. Just because in the next example, he has 2pi in both denominators
The easiest thing I can think of is 100216. Keep squaring and roll it on.
my wrist hurts from doing the right hand rule so much
@Bassant Mahmoud lol the left hand rule too!!
and wrestle with this angles
0:33 I just LOVE those sound effects 😂😂 great tutorials
This is like a physics lesson from a subdued Norm Macdonald. You even say "well, gosh" at 2:01. (But for real, this video answered my question!)
I learned more from you than my prof
5:00 I have a question. Why the distance in the I2 equation doesn't multiply by 2 pi?
isn't it a mistake by the teacher? he forgot to add it?
@@فيديوهاتتوعية-ر1ه I guess so
The world's best teacher thanks sir
You teach Awesome
Just go on teaching like this Sir
#LoveAndRespect
From INDIA😊😊
My teacher taught us with a very similar method but I couldn't get a thing. Thank you very much with the help of this video I feel like I can answer every single question my teacher gonna ask me
OMG THANK YOU SO MUCH! HAVE BEEN SEARCHING FOR THIS
You explain exceptionally well, thanks.
9:54 surely this expression for B1 is only true if b
At 5:07, I think the current in one of the wires shld be in the opposite direction in order for the magnetic fields to be added together.
at 7:50 you told that the current is going in to the page and out . Then the field will be in opposite directions and cancel out then right?
at 8:29, index finger out of page, middle finger along r, and my thumb points to the right.. why did you draw B to the left?
these magnetism vids are super helpful!!!
Thanks ! You helped me I’m participating in the IJSO2019
From Qatar
Beautiful job. I liked the intuitive explanations. Thank you.
Thank you for this video, it cleared up a lot.
because the magnetic field is going into the page on each wires left side, and out of the page on each wires right side. so in the middle, you have one of the left and one on the right
THANKS I REALLY WANTED THIS. 👍👍👍👍🤗🤗 VERY NICE VIDEO....
In your last example with the two wires, one going into the page and one coming out of the page, why would they repel each other. using the right hand rule, I get the force generated by the mag field at one wire, by the other wire, is toward the wire creating that mag field. Would that not mean attractive??
Hi
Thanks for the video. I have a question. We have a length of wire connected as a loop in series to the secondary of a current injection transformer. So the current shall be travelling through two parallel wires in opposite direction (from transformer to wire and back to transformer). Can we deduce the magnitude of magnetic field around the two wires?
At 5:04 why is the distance you're dividing by for the second wire just d and not 2*pi*d?
Is there a second video?
Where is the next video? are we using the cos theta for the angle? like when we calculate the electric field of the ring?
Legend has it you're still waiting on an answer 😂 The second video is available (youtube sometimes removes links in comments, so I I'll link to it in a separate reply), but it's there. Anyway, he continues the problem and, no, you use sin theta (not cosine) and with some cool trig/algebra and substitution, basically theta goes away and you don't even have to worry about the angle any more.
th-cam.com/video/NfDQFtY1n8E/w-d-xo.htmlsi=GRZ1nW2ZZLZG_eQq
For the field between 2 wires in the same direction at 6.43 :
Is I one the greater magnitude? rather, how does one differentiate between the I1 and I 2 for subtraction purposes?
why would one be going out of the page and the other into the page, since the current are both going downwards?
Look at the current from d's point of view
Hello! What if the currents have the same direction in this? What will happen to the magnetic field?
this is a pure exam question. thanks
Why has every example on youtube or other source use the magical scenario where all components cancel out except for one? If the point isn't in the center of the two, what then?
Isn't the r value for the distance from the current to the point of interest squared? So why didn'
t he square the sqrrt of a^2+b^2
no. it's not, this is a different formula. Maybe instead of trying to find errors pay more attention
thanks mr sharpie man you helped me so much
Are we supposed to account for the magnetic field of the Earth when doing these calculations? Why or why not?
+GoldenRaspberries I think not because it is (relatively) super small? not 100% sure but that's what i think.
Unless the problem states that you should, it's pointless. In some labs you can take that into account and try to angle whatever apparatus you are using a certain amount to have it line up with the magnetic field the apparatus is creating. That way you can add up the fields, but yeah the earth's magnetic field is relatively small to most of what you will work with in problems or labs.
What if the currents are in opposite directions?
Agtsmirnoff
they repel
where is the other video?!
I'm pretty sure he used Fleming's Left-Hand Rule for the second wire. Wink.
brilliant job
Thanks men..but I'm sure you notice your mistake with the current direction of the second wire
wheres the next video :S?
I figured out B at point b from the information he left us. I can show you, if you want
The second formula may be wrong
think it's 2 pi d ,he probably made a mistake or sth
Suyang Chen u call 2pid or 2 pi r...they are just variables
he forgot to write 2pi with d i n the denominator
Thanks
thanks a looooooooooooooot
legend
Thankyouuuuuuuuu
sh sh sh sh sh sh amperian loops
Excuse me, are you from the United States of America?
Yes I am.
@@lasseviren1 Thank you for your answer. I'm learning Physics and I'm trying to learn English (U.S.A.). I only speak Spanish
@@humbertosarmiento4638 All the best in your efforts to learn both English and Physics. You are an inspiration!
big up
Hahahahah...camilo ;)
thanks