Velocity Selector IB Physics

[@arjunasok3580]

Thank you brooi ❤️❤️❤️

[@ahmedrao5459]

GREATEST VIDEO EVER. PERIOD!!!!

[@jamshaidkhan5246]

Mind blowing explanation

[@manivannan7263]

Marvellous keep helping us 🙂

[@samirdeepkalita2534]

superb , that's called real physics.

[@civilworld.1]

Well-done so helpful

[@bleekwater6176]

Very helpful video!

[@jeevamariyatomy6280]

Thank you. Finally understood the concept well.. ❤️

[@ah_here_we_go_again5310]

I don’t think I have ever understood a video so thoroughly. This was excellently done - straight to the point and simple. Thank you so so so much!

[@danielm9463]

Thanks for the kind words! Good luck with your studies!!

[@thomashunt8596]

great video, thank you

[@launchtutors1677]

That was the most helpful video I seen.

[@danielm9463]

Glad it helped!

[@WahajKhan017]

Amazing ❤️

[@kishansharma8759]

nice

[@harrywinson3373]

Great explaination man!

[@danielm9463]

Thanks!

[@adithyanps8003]

why arent u famous? the video was well explained

[@piyushdahiya3696]

Very good video. Understood everything. Keep it up man☺️

[@danielm9463]

Thanks!

[@jansirani7549]

Thank you for helping me🙏🙏🙏

[@daliaruizdiaz2024]

Thanks! :)

[@warzone5707]

Thankyou so much for making this video

[@biochem2.027]

It is very helpful thanks for the explanation

[@danielm9463]

You're welcome!

[@mohamedgatish7333]

I love you bro❤️ thanks

[@seharirfan4544]

Bro U explained very well 👌

[@danielm9463]

Thanks!

[@seharirfan4544]

@@danielm9463 alright ❣

[@rajarshimahato66]

Thank You :)

[@tanyaparashar5736]

tysm..

[@azkahabib6400]

I'm not understanding the point where you said that when we increase the velocity the magnetic force increases and when we decrease the velocity the magnetic force decreases.

[@danielm9463]

Thanks for your question! You've identified a very strange quality of the magnetic force. It turns out that, when a charged particle moves through a magnetic field, the particle's speed can impact how much magnetic force the particle feels. Let's assume for simplicity that the particle is moving perpendicularly to the magnetic field lines. If the particle slows to half of its original speed, then the magnetic force cuts in half too. This is captured by the magnetic force equation: F = qvBsinθ. The magnetic force F is directly proportional to the particle's speed v. If you find this quality strange, you're not alone. This is one of the puzzles that Albert Einstein solved with the theory of special relativity. Let's imagine that a charged particle is traveling parallel to an infinitely long wire that is carrying a current. We're going to watch the process of speeding up from the particle's frame of reference. As the particle speeds, it experiences length contraction: the wire gets smaller, and the many electrons that form the current move closer together. Because of this, the electric force on our moving particle has increased: there's a higher density of electrons pushing on that particle. So what happened when the charge accelerated? The **electric** force increased due to length contraction. But if we watch the same event from the wire's frame of reference, then none of this happens. There is no length contraction, and the electric force doesn't increase. That's problematic, because it's impossible for the frame of reference (from which we merely observe) to impact the amount of force the moving particle feels. This conflict is resolved by the magnetic force: as we watch the charge speed up in the wire's frame of reference, we see the magnetic force increase because F = qvBsinθ. This makes up for the "missing" force, and restores consistency.

[@danielm9463]

Here's a great video with a physical illustration of the explanation I gave above. They use a slightly different version of the explanation, but the visuals are super helpful. kzbin.info/www/bejne/Z4WuhJl3oLyKhJI

[@raviyadav2552]

@@danielm9463 thanks for the explanations

[@divyasaini8998]

but i think that we apply right hand rule in case of induced current

[@danielm9463]

That's correct! The right hand rule is extremely versatile. In fact, it is used in a very wide variety of scenarios, including many outside of electromagnetism (torque, angular acceleration, etc.). As we apply the right hand rule to each of these different physical scenarios, we must change what our fingers/palm/thumb are pointing with. Sometimes it's current, sometimes it's velocity, sometimes it's position, etc. The details depend on the physical scenario where we're using the right hand rule.

[@akshatkant6635]

Thanks for making this video

[@danielm9463]

You're welcome! Thanks for watching, Akshat

[@gaitougangmei8812]

What about for the electron insted of protron??

[@danielm9463]

For an electron, you follow the exact same procedure, *except* that you use your left hand instead of your right hand. OR, you can follow this alternate procedure for electrons: instead of using your left hand, use the *exact* same method from the video using your right hand. Then at the end, the final direction is the opposite of the direction your right hand produces. So if the right hand rule (RHR) says that the direction is *upward*, then the final direction is opposite--downward. If the RHR says the direction is leftward, then the final direction is opposite--rightward.

[@mkeey9031]

Thank you it was helpful

[@devikasmenon8785]

Thank you so much sir..

[@aya_a9284]

thank you so much

[@RohitSharma__physics]

kzbin.info/www/bejne/hYubY3yNec-hg5o

[@khaledkota5007]

Thanks

[@amyannaroy8357]

thanks I subscribed ☺

[@danielm9463]

Thanks!

[@yesskay]

Nice dude

[@danielm9463]

Thanks!