Lenz's Law (part 2 of 3)

[@akioshun]

I've completed your lessons on Biot Savart's and Ampere's law, and boy were they amazing ! I do not fear ElectroMagnetics now ! Thank You ! You are so much better at teaching than the profs i have over here.

[@Artie_Rosado]

Watching this video before I take my physics exam. Thank you uploader

[@juanfelipe8484]

This man is a living legend

[@patriciatak4987]

Watching this 8 years later and this is still so good !! make more videoosss

[@DragonFirebolt115]

Thank you so much. I really would not be understanding my physics class without you

[@AA-oh6oo]

its 2020 YOU ARE STILL THE BEST

[@LarryLovestein23]

what happens if you flip the magnet at the example around 4:00? as long as youre moving away from the coil im assuming ittl be the same right?

[@ibrahimelkilani9376]

12 years later, still VERY helpful

[@lasseviren1]

That is not correct. The field from the magnet is pointing downward inside the solenoid. And this downward magnetic field is decreasing because the bar magnet is being pulled upward. So in an attempt to slow the the changing magnetic flux passing through it, the solenoid will make its own field downward. If it made the magnetic field upward, then that would even change the flux faster.

[@elisglaze6077]

Amazing explanation. The examples you provided truly solidified the concept for me

[@blairbecht2]

Do you use electron current flow....neg (-) to pos (+) Or conventional current flow pos (+) to neg(-) We are taught using electron flow.

[@Adirockz1]

Shouldnt the current flow be from the positive terminal to the negative terminal in the 3rd case?

[@4thKyuubi]

@Adirockz1 I think for a source, the current comes out of its positive terminal. But if it's like a resistor, current is in the direction of the negative terminal.

[@printfhello747]

greetings from Egypt

[@roseb2105]

for 4:17 of this video second diagram how did you know that the magnetic field of the coil is going downward?

[@shreyshrestha5047]

For the third problem, how do you knoe the direction of the magnetic field? Or is it just given in the question ?

[@moasfco11]

im confused on number 3 isn't the current of the coil above the circuit be the opposite way since the flux and b are increasing, therefore makes an opposite induced magnetic field in coil above???GREAT VIDEO by the way!!

[@amirkallel8114]

08:40 Does the Fleming's Left Hand Rule represents the direction of the conventional current !!? You are saying that electroncs are pushed down! I'm confused, can someone explain to me :)

[@clnblm]

+Amir Kallel The way I was taught is, the right hand rule: point your fingers in the direction of the magnetic field, point your thumb in the direction of the velocity, and positive charges will come from your palm and negative from the back of your hand. This matches what he says in the video. Hope this helps.

[@Neo-po2xw]

Nope For electron use your Left hand. Say Point your four finger(finger right beside thumb) towards velocity and third towards magnetic filed going into the page. Then stretch your thumb. You will notice Thumb will give you direction to the Magentic force downwards of the page. Now the M.Force will push electrons flowing in rod downwards. Use use Left hand.

[@WHY70122]

In the 2nd case, your moving the magnet up =- the B field decreases=- it will make its own field go up again to balance right? Why do you say it will make its own field go down? Am i right or i didn't understand it correctly?

[@WHY70122]

Great clarification and i just realized why i got you wrong. That was because of the terms "up"-"down". Here is how i come up with. The mag field pointing down from the magnet- and as we pull it away, the field decreases=- the current will try to resist that change by making its own field INCREASE (it would be another misunderstand here if i use UP again LOL) in such a way that there will be more lines pointing DOWN. Is this correct now?

[@जयश्रीकांतजय]

If we place a capacitor then can we predict nature of charge in such problems ?????🤔🤔

[@blairbecht2]

You confusing me on the hand rule for conductors. You seem to be using a Right hand rule with thumb pointing in direction of current flow and your 4 fingers represing the direction of the magnetic field. I am an apprentice at my local IBEW and we are taught the Left-hand rule for conductors to dertimine direction of the magnetic field which is created the the current flow. I am really enjoying this video on Lens's law as we just recently opened our AC theory book.

[@michaeltang6822]

Why in the fourth example do X's increase as you move bar to the right?

[@zacharyplato2324]

+Michael Tang He is saying that the quantity of X's (which represents magnetic field) increases through the area between the bar and slider as he moves the bar to the right. The field is uniform however we are just adding more of it now.

[@abdo15382]

where have you been all my life??????, i wish all physics teachers were like you

[@АнастасияВоронина-щ3ъ]

Great explanation, many thanks for your hard work

[@zanbutt1030]

thank you so much, I have a physics test tmrw, and your videos are just amazing!

[@Andy4Candy]

For the fourth case, you're decreasing your area. Shouldn't you compensate by creating more of the +'s by going clockwise?

[@Eszekial]

Thank you so much! what took my teacher hours took you only a few minutes!

[@zawette]

I don't understand the right hand rule ur using on this video why is the thumb representing the mag field while the other 4 fingers are representing the current

[@achintyadutta2702]

The thumb can represent the Current and the remaining fingers can represent the field as well. The right hand rule, also known as "Maxwell's Corkscrew rule" is quite useful that way. Hold up your thumb in the "corkscrew" way. Now, imagine a wire with current flowing towards the direction your thumb is pointing to. You can see that your fingers are curled up into your palm. In a way, you can visualise that the magnetic field goes around the wire in a circular way from the left to right. Therefore, on the right side of the wire, the field sinks into the plane but on the left hand, it arises from the plane. I hope this helps.

[@shailjaasati3769]

Thanks for all your assistance it made me ready to defeat electromagnetic induction

[@mdenjamamulhoque6374]

many thanks sir!😊

[@BlackOfTheNight]

This really helped me understand all of this. Thank you so much for your help! You're way better than this stupid physics textbook of mine!!!!!

[@403MC2]

phenomenal videos!

[@taylormcleod3331]

Your videos are so helpful man!

[@nairikeshishian]

cleared all my confusions. great examples

[@justadreamerforgood69]

Snapchat ?

[@drayiss1]

@@justadreamerforgood69 down bad 💀💀

[@justadreamerforgood69]

@@drayiss1 Damn this was 3 years ago 😭

[@MrBlash93]

Thank you very much for your video. You are extremely helpful.

[@AlexcForsyth]

You are awesome! Thank you so much

[@afiqrohaizam790]

Thanks ...very helpful😊

[@aaronshi721]

wonder where this guy is now

[@sunghwang9159]

oh my. I finally get it. thank you

[@patriciatak4987]

BEST VIDEO

[@bhavyajainnd]

thank you so much , very helpful video :D

[@mafia6330]

thank you so much

[@surendrakverma555]

Good 🙏🙏🙏

[@俾D掙扎]

thank you very much take care also you help me a lot

[@kyleclaassen2854]

Thanks a lot !

[@smartlearning7077]

Thank u a lot! u r gr8

[@5418arash]

I wish you were my physics teacher!! :(((

[@bilalbaig8586]

is this guy cgpgrey in disguise?

[@llllllllllllllllllllllllIIIIl1]

me during phsyics exams: 2:20

[@deleteeeeeeed]

THANK YOU!!!!!!!!!!!

[@justadreamerforgood69]

You're cute

[@alexmen6155]

Ok