You are the man. seriously. please don't stop making these videos. I thought i was stupid in my classes, i was blindsighted by cross products and fancy integrals as my teacher flew through equations and paused every 20 minutes to ask "any questions?" when no one responded i thought it was because they all got it. now i know its because no one even knew what to ask. I am watching your videos and i am learning. Thank you.
Brilliant Video. Very Simplified and friendly for students. Keep promoting this concise and easy to learn art of teaching. A lot of professors could learn a lot from you methodology of lessons.
You just don't know how respect I feel toward you ( and other ppl who spend their valuable time to make all the educational videos). Thanks for spreading out your knowledge. Honestly, I've been so fked up by this law for a whole week without being able to figure out how it works...and it does now!!!! Hell yeah :D
Yes he's using the postitive current. Right Hand Rule 2 (RHR 2 and 1) both use conventional current and follow the positive current or "proton" that moves around the circuit. THis is bec the discoverer's of current thought it was a + proton moving from positive to negative terminal, only to find it is the electron - to + but it stuck. Just remember if you use - current you have to switch it bec his example will be backwards as its the conventional or + current. Hope that helps!
Being ahead makes life easy. I'm taking an accelerated Engineering Physics II course this summer. There is so much new information to me in it that I have to watch videos in addition to lecture to really understand it.
2:40 If B Field Grows (x) induced current to grow more. Conservation of energy 4:20 Thumb along the hoop thumbs go OUTSIDE inside the loop, and IN OUTSIDE of LOOP. 4:45 Alternative RHR
just wanted share to a bit of what i understood. please correct me if i'm wrong .when the magnetic flux is DECREASING, the direction of currect induced in that coil won't change , that is, when you apply right hand thumb rule to get the direction it will give you the direction of induced current. but when the flux is INCREASING, the direction of the induced current through the coil will get flipped, that is, the direction will be opposite of what you get on applying right hand thumb rule.
Can't we use the left hand like we do the right hand in Faradays? The thumbs indicates the direction on which the magnet is advancing toward the hoop, and the fingers imply the direction of the induced current, if we wanted to find out the direction of B(induction) we can just reverse the direction of the magnet's advancing direction. I hope I got the idea across..
you use your right hand to find the direction of the field via putting your thumb in the direction of the current and wraping your fingeres around. leading me to question if you are following the negitve current? if you are following the possitive current it would make sence. but shouldn't you be using the 1st left hand rule for this??? ie left hand??
For anyone who cares, I'd like to share my own version of Lenz's law that might help. It's a shorter version. *In repel, out attract*. This is basically what's going on. When you put in a magnetic field, the area's magnetic field repels it. When you take out a magnetic field, the area's magnetic field attracts it. It basically tries what it can to stay the same (have the same amount of flux).
theres 2 wires. the upward current one is generating a magnetic field into the page on the right side of it. the square is another wire that wants to balance that out by making a magnetic field out of the page.
Thank you for putting this in perspective. Our book for physics is good, but I don't think it helped me to truly capture what was going on here. I was under the impression that in order to resist the change in flux, there had to be an outside source, but I see now that this is a natural occurrence. Thanks so much!
with the I increasing example, isnt the direction of field into the page by the RHR since your current is upwards? I'm not clear as to why yours seems to be pointing out of the page.
Thank you for this video! You explain the idea really clearly. There is just one thing I am still stuck on that I would be grateful if someone could explain; at around 3:00, it is said that if the current were to be going clockwise then it would violate the conservation of energy, but I don't get why the magnet being drawn in faster violates means that energy is coming out of nowhere. Yes, it's kinetic energy is increasing, but it's potential energy is decreasing also, right? Sorry if I have said something very incorrect, and thank you in advance for any replies!
Amazing video! Thank you so much! Question though, when you have the wire with an increasing or decreasing i (the two bottom images). How did you know that the field consist of x, and not dots?
same as : if induced current is into the page, the direction will always be -> (clockwise) am i correct? of you need to apply the right hand rule always ?
I can't understand ..how did u apply the rule?..can u tell me if i got the idea or not by reading my explaination?..my understanding is (if we have magnetic flux of 'x' so induced field will be dot • in both cases increasing or decreasing..is that right?? I wish to get ur answer ..and thanks
so basically it's like LeChatelier's law, but for physics... cool, I actually GET IT :) thank you so much for these videos, by making things simpler and more understandable than the damned physics book I own, it makes me actually WANT to study this!!
The X's mean "Going into the page" and dots mean "Coming out of the page". It's just a convention physicists use because it's hard to draw 3d arrows on a 2d sheet of paper
I am still confused, I think that is partially because physics is two years away for me, but I am trying to be prepared for when my two favorite subjects collide
I hope this helps. I made up my own rule for Len'z law. *In repel, out attract*. This is a really short version of what he's saying. Using this and the right hand rule, you can find the direction of the induced current. And remember that magnetic field lines points from north pole to south pole. And remember that opposite poles attract. When a magnetic field goes INTO a coil (an area), the coil creates it's own magnetic field so that the poles of that magnetic field REPELS the magnetic field going into the area. When a magnetic field goes OUT of a coil (an area), the coil creates it's own magnetic field so that the poles of that magnetic field ATTRACTS the magnetic field leaving the area. You can also think of it this way. An area is like an emotionally unstable gf. When you (magnetic field) try to leave her house, she tries to pull you back in. But if you try going into her house, she tries kicking you out. Basically the area just wants to stay the same and tries doing whatever it can to stay the same by creating a magnetic field. This also applies when you shrink or expand the area. When you shrink the area, it gets smaller and the magnetic field leaves the area. When you expand the area, the magnetic field goes into the area. Try it out, you'll understand it better by drawing a coil and a magnetic field leaving it or entering it. With the right hand rule, thumb points in the direction of the current, and your fingers curl in the direction of the magnetic field. And remember that magnetic field lines points from north pole to south pole. My suggestion is to draw the coils so that they look like lines (one dimensional). If you draw them this way, it's easier to see the poles of the magnetic field around the coil. It helps to draw a magnet, too
Cross, the reason why this might not be helpful to you is because you don't have a basic grasp of electricity & magnetism yet which the video assumes you do (right hand rule, relationship between circuits and fields, conductivity etc). You need to read up on that first. Watching a video on Lenz's law without first grasping the basic notions is kind of like watching a video on how to solve a quadratic equation before understanding why x=2 for 2x=4. Good effort tho
I scored 100% on my last undergraduate-level E&M exam thanks to your videos. I really appreciate all of your work on these videos!
2 years of confusion solved in 10 minutes
Thankyou so much......
Very clear explanation........
You are the man. seriously. please don't stop making these videos. I thought i was stupid in my classes, i was blindsighted by cross products and fancy integrals as my teacher flew through equations and paused every 20 minutes to ask "any questions?"
when no one responded i thought it was because they all got it. now i know its because no one even knew what to ask.
I am watching your videos and i am learning. Thank you.
Better explanation than most of the other videos I've seen on TH-cam, cheers!
"ok thx bye". Simple ending to a simple video. Thank you sir.
hey, you are the only person who explains lenz's law the best, i owe you a lot. thanks!
I'm loving the sign off lmaooo. "k thx bye." :D
This is a fantastic video, from a struggling Physics B student, thank you so much!
I have never seen such an awesome clarification of Lenz's law. Now I understand it entirely. Thank you!
This is so so helpful. I've come here for the second time now, to revise my lenz's law. Thank you for this video.
this helped me conceptually to the max! some videos just confuse me even more, sadly, but nope, this was ingenious.
I spent over an hour searching for a good explanation and finally got it. Thank you :D
I stopped at 3:41. The lesson has already been summarized at that point in time. Thank you for the quick lesson!
Brilliant Video. Very Simplified and friendly for students. Keep promoting this concise and easy to learn art of teaching. A lot of professors could learn a lot from you methodology of lessons.
I would never be able to pass my university phys 2 class without ur videos!! THANK YOU
Which course did you take ?
2017 now, and your videos still leads.
You just don't know how respect I feel toward you ( and other ppl who spend their valuable time to make all the educational videos). Thanks for spreading out your knowledge. Honestly, I've been so fked up by this law for a whole week without being able to figure out how it works...and it does now!!!! Hell yeah :D
Yes he's using the postitive current. Right Hand Rule 2 (RHR 2 and 1) both use conventional current and follow the positive current or "proton" that moves around the circuit. THis is bec the discoverer's of current thought it was a + proton moving from positive to negative terminal, only to find it is the electron - to + but it stuck. Just remember if you use - current you have to switch it bec his example will be backwards as its the conventional or + current. Hope that helps!
what the flux
You are fluxing out, man.
Garrett Hall I'm confused. Why are people watching AP Physics videos in the middle of the summer. All you mofos trying to get ahead. :P
Being ahead makes life easy. I'm taking an accelerated Engineering Physics II course this summer. There is so much new information to me in it that I have to watch videos in addition to lecture to really understand it.
Garrett Hall what he said haha.. final exam tomorrow over here..
I needed that after studying for the past 12 hours
literally changed my life
good video, the great part about these good science and math videos is that they never age
Way better than my physics teacher
Great job at teaching and explaining !!You made is easier to understand :)
Many People Understand concepts But NOT many can EXPLAIN.....
APPRECIATE!!!!
studying for final exam tomorrow at 8am, this was just brilliant!!! Thank you so very much (^^,)
2:40 If B Field Grows (x) induced current to grow more. Conservation of energy
4:20 Thumb along the hoop thumbs go OUTSIDE inside the loop, and IN OUTSIDE of LOOP.
4:45 Alternative RHR
I'm 47 seconds in and it already makes more sense than my textbook chapter.
OMG I GET THIS!!!! In like two seconds - much easier than reading my physics book!
just wanted share to a bit of what i understood. please correct me if i'm wrong .when the magnetic flux is DECREASING, the direction of currect induced in that coil won't change , that is, when you apply right hand thumb rule to get the direction it will give you the direction of induced current. but when the flux is INCREASING, the direction of the induced current through the coil will get flipped, that is, the direction will be opposite of what you get on applying right hand thumb rule.
One of the greatest explanations, thank you so much
Can't we use the left hand like we do the right hand in Faradays? The thumbs indicates the direction on which the magnet is advancing toward the hoop, and the fingers imply the direction of the induced current, if we wanted to find out the direction of B(induction) we can just reverse the direction of the magnet's advancing direction. I hope I got the idea across..
OK THANKS BYE
Ahahahhahah I know right !!! Guy's a legend
You are the Beast of Physics. Great video Thank you so much.
you use your right hand to find the direction of the field via putting your thumb in the direction of the current and wraping your fingeres around. leading me to question if you are following the negitve current? if you are following the possitive current it would make sence. but shouldn't you be using the 1st left hand rule for this??? ie left hand??
You are an excellent educator. Thankyou
For anyone who cares, I'd like to share my own version of Lenz's law that might help. It's a shorter version. *In repel, out attract*. This is basically what's going on. When you put in a magnetic field, the area's magnetic field repels it. When you take out a magnetic field, the area's magnetic field attracts it. It basically tries what it can to stay the same (have the same amount of flux).
theres 2 wires. the upward current one is generating a magnetic field into the page on the right side of it. the square is another wire that wants to balance that out by making a magnetic field out of the page.
Thank you for putting this in perspective. Our book for physics is good, but I don't think it helped me to truly capture what was going on here. I was under the impression that in order to resist the change in flux, there had to be an outside source, but I see now that this is a natural occurrence. Thanks so much!
You're such a help w/ my physics class.
with the I increasing example, isnt the direction of field into the page by the RHR since your current is upwards? I'm not clear as to why yours seems to be pointing out of the page.
Thank you thank you thank you for explaining the "increasing" and "decreasing" thing.
the video i've needed all year
Thank you for this video! You explain the idea really clearly. There is just one thing I am still stuck on that I would be grateful if someone could explain; at around 3:00, it is said that if the current were to be going clockwise then it would violate the conservation of energy, but I don't get why the magnet being drawn in faster violates means that energy is coming out of nowhere. Yes, it's kinetic energy is increasing, but it's potential energy is decreasing also, right? Sorry if I have said something very incorrect, and thank you in advance for any replies!
Detailed explanation. Extremely helpful
I'm pretty sure that inertia works the same way. It's the minus sign in the gravitoelectromagnetic Maxwell-Faraday equation. Lenz's law is inertia.
the best explanation in youtube.. thank you very much sir..very helpful!!
Amazing video! Thank you so much! Question though, when you have the wire with an increasing or decreasing i (the two bottom images). How did you know that the field consist of x, and not dots?
I dont understand what is trying to make x or trying to make dot in the hoop?
if induced current is out of the page, the direction will always would be
same as :
if induced current is into the page, the direction will always be -> (clockwise)
am i correct? of you need to apply the right hand rule always ?
have not learned anything all semester, watching before the midterm and feeling chill
I can't understand ..how did u apply the rule?..can u tell me if i got the idea or not by reading my explaination?..my understanding is (if we have magnetic flux of 'x' so induced field will be dot • in both cases increasing or decreasing..is that right?? I wish to get ur answer ..and thanks
Oh my gosh, these videos are so helpful.
who needs a book wen u got this guyy!!!!!
wawww.. it looks like Le Chateliers Principle in which the current (equilibrium) tends to oppose the magnetic field (stress or change in the reaction)
Loved the video sir.... Very good trick i got it all right
Thank you so much! The simplest explanation is always the best!
I always get confused as to when to use the right hand rule, and when to use the left hand rule.
You're so amazing I love watching your videos so much
Wow.. I wished I watched this video before my exam..
Excellent lecture Sir 🙏🙏🙏🙏🙏
so basically it's like LeChatelier's law, but for physics... cool, I actually GET IT :)
thank you so much for these videos, by making things simpler and more understandable than the damned physics book I own, it makes me actually WANT to study this!!
You're a snack
This helped a lot. Succinct and easy to understand video!
truly splendid sir !!!
This lectures are so awesome o,o perfect explanations!
That Helped Me So Mch! Keep Making Such Videos!💯✌️
what does the *X's* and the *dots* represents there? plssss i need answers noww.
The X's mean "Going into the page" and dots mean "Coming out of the page". It's just a convention physicists use because it's hard to draw 3d arrows on a 2d sheet of paper
Thank you for helping me see through the Lenz to clarity! Ha ha.
That makes everything much more clear in my head :D You are awesome! :)
What's your Instagram ?
FANTASTIC EXPLANATION.....EXCELLENT.
Samjh nahi aaya pr sun Kar achha laga
this guy is a legend
Dude, you are awesome!!!! I understood the topic in a jiffy. Thanks a tonne :)
Great video! Very helpful!
THANK YOU!!!!!! This makes so much sense now.
Which course ?
I am still confused, I think that is partially because physics is two years away for me, but I am trying to be prepared for when my two favorite subjects collide
I hope this helps. I made up my own rule for Len'z law. *In repel, out attract*. This is a really short version of what he's saying. Using this and the right hand rule, you can find the direction of the induced current. And remember that magnetic field lines points from north pole to south pole. And remember that opposite poles attract.
When a magnetic field goes INTO a coil (an area), the coil creates it's own magnetic field so that the poles of that magnetic field REPELS the magnetic field going into the area.
When a magnetic field goes OUT of a coil (an area), the coil creates it's own magnetic field so that the poles of that magnetic field ATTRACTS the magnetic field leaving the area.
You can also think of it this way. An area is like an emotionally unstable gf. When you (magnetic field) try to leave her house, she tries to pull you back in. But if you try going into her house, she tries kicking you out.
Basically the area just wants to stay the same and tries doing whatever it can to stay the same by creating a magnetic field. This also applies when you shrink or expand the area. When you shrink the area, it gets smaller and the magnetic field leaves the area. When you expand the area, the magnetic field goes into the area.
Try it out, you'll understand it better by drawing a coil and a magnetic field leaving it or entering it. With the right hand rule, thumb points in the direction of the current, and your fingers curl in the direction of the magnetic field. And remember that magnetic field lines points from north pole to south pole. My suggestion is to draw the coils so that they look like lines (one dimensional). If you draw them this way, it's easier to see the poles of the magnetic field around the coil. It helps to draw a magnet, too
Cross, the reason why this might not be helpful to you is because you don't have a basic grasp of electricity & magnetism yet which the video assumes you do (right hand rule, relationship between circuits and fields, conductivity etc). You need to read up on that first.
Watching a video on Lenz's law without first grasping the basic notions is kind of like watching a video on how to solve a quadratic equation before understanding why x=2 for 2x=4. Good effort tho
+Pablo P My god. You explained it in such words a short attention span moron could understand.
yipee!! now i got it right !getting this into my mind was very much needed..!!much obliged..kudos
thank you soso much. you are a brilliant teacher
Thank you! Very clear explanations!
The best explanation!!!
Wait guys what do the "X"s stand for?
x represents the magnetic B field vector going into the page, and the dots are coming out of the page
You're wonderful cannot say it enough
this makes so a lot more sense!!
Thanks!!. It was very helpful.
Good explanation.....
Amazing Job. Thank you
Thank you! You have saved me!
this helped me soooooo much. thank you!
Thanks for the explanation
Thank you for the amazing explanation!
thank you..great video!
Very helpful😀😀😀😀
excellent..thanks a million
you're a legend
Thanks a lot. I understand it more now
Unbelievable I did stop that short... clue!
Great video
plzz make more videos like this!!! :)
thank you so much, this helped alot
You sir have saved me