Charges in Magnetic Fields - A-level Physics

[@Cardifyz]

If the time period for one rotation is given by that equation at 17:55 surly you need to half that to find the time for 1 half rotation and then reciprocate it to find frequency. so F should be BQ/pi*m?

[@ScienceShorts]

+Cardifyz Nope, because the polarity of the dees has to flip twice in the time it takes for a proton to rotate once, which is what one time period is for AC.

[@Cardifyz]

Thanks I understand now :D Your videos are great!

[@javiermarazuela]

Thanks, I had the same doubt. You really helped me out!

[@mujeebrehman7810]

@@ScienceShorts so you mean that time period is the time taken taken for the proton to travel through one dee?

[@shyamkanjee6409]

@@mujeebrehman7810 No, he means that one time period is the time taken for the proton to do one full rotation. In that rotation, the polarity flips twice which is when the AC current has done one time period itself.

[@syedjafri9395]

People like you deserve a special place in heaven. Man be carrying us around in A2 physics.

[@kyliek.9481]

1:15- direction of current 2:14- centripetal force on a charged particle 7:00- particle detectors 9:00- mass spectroscopy 13:20- cyclotrons

[@swright4171]

thank you :)

[@user-nk5qs8km3d]

luv

[@Narc0YT]

I recommend this video to anyone like me who struggled to understand cyclotrons / mass spectrometers. They are very well explained and help with the understanding of the topic

[@jaxsannathan1013]

I want him as my physics teacher.

[@ibrahimahmed3127]

You absolute legend!!!!! I could never understand this before.

[@gvh06]

Up at half 5 in the morning watching your stuff ahead of the exam today, you're a life saver

[@MasterFeiFongWong]

This may be off topic, but I think someone might find it interesting. :) Device to end the creation of Nuclear waist. Electric Generator Design that's powered by it's self & perpetuates more electrical current then is needed for it to run continuously on it's own. Step 1: calculate how much energy you need pumped into an electric motor to make a vertically positioned circular platter with magnets in-bedded horizontally around it's left side and right side (so there pushing force is pushing out sideways relative to the vertically spinning disc) to spin as fast as you need it to. Also better to make sure these magnets are shielded around their sides & back with metal that has high permeability so the magnetic field they are emitting is focused fully out sideways. :D Step 2: Calculate how many sets of copper coils you need to be interacting with magnetic fields to achieve this & to perpetuate more electrical current flow then is needed. :D Step 3: Build a round horizontally positioned platter covered in all these copper coils pointed down that does not move (Is stationary) :D Step 4: build a round platter covered in powerful magnets pointed up that can spin and place it directly under platter with hanging copper coils. :D Step 5: Position the vertical platter that is motorized close to the horizontally positioned platter covered in magnets pointing up so that when the vertically positioned platter spins the in-bedded horizontally positioned magnetic fields slam sideways against the edge of the horizontally positioned platter causing it to spin. :) Step 6: Make sure enough of the copper coils are feeding their electrical current into the electric motor and the rest of the copper coils are linked into a set of rechargeable Battery's placed in the closest most convenient spot. Step 7: Build a duplicate setup of horizontally positioned discs with hanging copper coils and disc with upwards facing magnets and assuming the first set of discs are positioned to the front left side of vertical spinning disc, position the other duplicate structures to the front right, the back left and the back right of the vertically positioned motorized disc. As the vertically positioned motorized disc spins the horizontally in-beaded magnets will now hit into all 4 horizontally positioned discs causing them to spin. so you will effectively be using the spin of one disc powered by one electric motor to spin 4 constructs that are each generating electrical current. now build this whole setup multiple times over and use the current perpetuated by it to power up scaled electromagnetic generators that are equal to or more powerful than the ones used in a nuclear power plant. You will now have a device that is self perpetuating off of it's own electrical current perpetuation and no nuclear waist to worry about.

[@naramroketa9687]

You are very much up there with the greats such as Mr Trifon Madas (rip). My goat, thank you for being more useful than my teachers could ever aspire to be

[@richard2088]

Flipping off physics at its finest 1:51

[@xsyxiyad1139]

i just dont understand why ppl dislike those type of vids .... like this guy is tryna save your ass here

[@ishtiakhasan3122]

Hello sir, i wanted to let you know finding your channel was like finding a gem for me. I'm totally on my own as a private IAL candidate, I got no teachers or whatever, just the internet and books, so your contents are perfect for me to understand the concepts. Thank you so much, and please keep uploading sharing knowledges.

[@michaelhazell7065]

2:28 what's the paper ever done to deserve that?

[@Mono_Autophobic]

What

[@youssefelsherbiny]

@@Mono_Autophobic the middle finger

[@HoshikawaHikari]

Probably gave him a paper cut? XD

[@ibrahimabdullah8949]

God bless you sir!!!! beautifully and well explained!!!

[@covalent4897]

thank you for this video. really saved me in my paper🤓🤓🤓

[@edforever6299]

best explanation of mass spectrometry and cyclotrons ive seen, thank you, defo think mass spectrometry will come up in aqa paper 2

[@f0arisntc730]

+Science Shorts I think that the transformers and the capacitors video should be in the fields play list as well as it is in the same module, just a suggestion. Great Videos btw!

[@scenzonhain3815]

"Deez Nuts" haha gotchu at 13:49

[@pictureparks5818]

Was looking for this comment 😂

[@aymenjahangir9784]

Your explanation on why a charged particle will spiral (the whole horizontal component of velocity not being affected by the magnetic field )was spot on.

[@valarmorghulis209]

Aymen Jahangir valar morghulis

[@troliverxx5351]

thank you you explained that perfectly

[@chrislavers7726]

Just found your channel, love it already!

[@mevinimunaweera9841]

Great explanation as always👍.This helped me a lot.😊

[@yukicrosszeria101]

can you please do a course on digital electronics, flip flops etc, you are a really great teacher

[@reubensmith917]

Amazing set of videos! Great for crammers like myself

[@sabahhadhood603]

Thanks so much for your excellent lectures.

[@carpanels8956]

I remember the semi circles by 'dees nuts'

[@Mach3Max]

(I am a complete idiot) + (I understood all your explanations) = (YOU 'RE GOOD) x (at explaining). Thank you !

[@taladiv3415]

13:19, "not the name of a transformer" 😃 I terribly miss that magnificent series (1986 - 1990)!

[@matthewmeuleman3369]

Really good video!

[@milesaasher6979]

Thank you !!!! You are reeeeeeeeeeeally amazing!!!!!!!!!!

[@NeboFilms]

Great video! - in the velocity selector you consider the force do to B and the force due to E, what about the force due to gravity? Is that so small we leave it out?

[@ScienceShorts]

+NeboFilms Correct, we do not take into account the force of gravity.

[@andresg4606]

Hey thanks for the videos, they are really great

[@brianfinnegan9700]

great video, thank u Sir

[@revisionaccount2104]

I'm pretty sure the time period of the AC in the cyclotron should be halved, so therefore the overall frequency is doubled. Is that correct?

[@ScienceShorts]

No! Why does everyone think that?

[@deadlyphoenix83]

@@ScienceShorts surely that's the case since the particle travels around 1 dee (half a circle) before the voltage reverses?

[@dickiefinehuman5269]

@@ScienceShorts because of a past paper i think 2017

[@markdallen4018]

@@ScienceShorts They aren't listening to the part when you said it's the time period of a full transition from positive to negative and back again, rather than just one change.

[@LazarusWilhelm]

dees nuts

[@saimxalam]

i was looking for this comment

[@ukimenustah7932]

annual chain reply laughing at dees nuts joke

[@girlonline3742]

4:14 is it spiralling inwards or is it spiralling in a perfect cylinder with no change in radius because I'm not sure if I'm getting it confused with part 7:29

[@dulapiip]

*_I LOVE YOU_*

[@akshit1101]

Hi! Where can i find an explanation for Hall Voltage?

[@Awai_quotes]

i think you should have include magnetic fields in cyclotrons a bit more like there is one magnetic field plate on top and one on bottom which makes the charge go in cirlce in the dees as there is no electric field.

[@ScienceShorts]

🤨

[@Elitea20]

What is the definition of a feild?

[@almanxyz7827]

very good video, i like thumbs 🥳

[@tarandhillon3651]

For people doing OCR A we don't need to know about the CYCLOTRON as its only in the aqa spec right?

[@Breazyy1]

Cyclotron sounds like a name of a transformer lmao

[@ScottE77]

I don't understand why the electron turns around at 3:47 it seems like it should just start to turn then go the other way, not spiral back again

[@Seby438]

If you were accelerating an electron in the cyclotron would it spiral the other way?

[@muhammadahmed6038]

Amazing!!!

[@sparky844]

I haven't even started my A-Level Physics course yet just finished me GCSEs. I'm just watching these vids cuz Physics is so interesting... and I want a bit of a head start😊

[@PixelLabz]

Am I right about saying that the magnetic field lines go into the page for the cyclotron but only inside the dees? It's took me over half a year to understand these and your videos help so much, thank you :) *edit* Also why doesn't the magnetic field alter the speed of a proton in the cyclotron inside a dee when F=BQv which shows that B is proportional to v?

[@Cars.r.us2023]

just me that almost breaks my wrist in trying to work out f,b,i in flemmings left hand rule?

[@Tintin-dm4ym]

You’re awesome

[@mateiaprozianu3289]

glory to the teachers

[@EilighOlive]

I will love you long time if you make one of Polarisation and EMF. You've basically been carrying me through my A-Level, thank you so much senpai

[@ScienceShorts]

Some polarisation already in the Waves vid, but will try to do emf soon, Anthony-kun.

[@Stevie-ld8ue]

Hi just wondering, 9:30, the direction of the magnetic field is going into the screen. By using flemings left hand rule wouldn't for force on the positively charged particle act upwards? Seeing as current is flowing from left to right?

[@ScienceShorts]

The field is coming out of the screen.

[@ayddem07]

Bruv last video the guy side it's the right hand rule is it just a up down side ways rule or something

[@x_nova_x7469]

8:11 would this not work though for pair production as pair production only produces a particle and its corresponding anti-particle therefore a proton or an anti-proton or an electron and a positron could be made not a positron and an electron from pair production?

[@bainzy9627]

Could the ion have a bigger radius due to it having a higher charge then an electron assuming it has more then one proton?

[@ScienceShorts]

It depends on how many electrons it's lost. I have seen questions that ask about doubly-charged ions.

[@KarthikeyanDuraivel]

Also wont it have a higher radius due to it having a higher inertia of motion[momentum], as it would have a greater mass so it would be harder for it's direction to change.

[@KarthikeyanDuraivel]

as even the relationship between radius mass is directly propotional

[@muhammadjazibikramniazi5996]

are cyclotrons still in a level syllabus?

[@jonocour]

yes they are

[@jonocour]

@fapping anonymously tbh mate I don’t have a clue anymore. I am at uni. Just try and type in your exam board so say AQA physics syllabus alevel and hope something comes up. Your teacher should really have told you this info

[@SullyOrchestration]

nice

[@hyportnex3973]

How do charges that the source emit randomly in time get synchronized in phase with the gap voltage? What happens to the ones that arrive at the gap but the voltage is of the wrong sign?

[@saintoffootball7706]

you dont have a video on hall effect

[@michaelhunt2222]

Can u make some videos on A-level astrophysics?

[@ScienceShorts]

Mayyyybe.

[@sankhagamage1928]

Cyclotron Dees are like a Babybell

[@karandhawatal]

What about the weight of the ion?

[@krishnanpillay5048]

The gravitational force here is negligible, so "mg" the weight would have no effect.

[@rocklerock495]

You lost me where the free electron is actually moving the opposite way using the Fleming's left hand rule. Why does an electron move the opposite way if it's going the other way? I'm confused :(

[@xenoclops756]

left hand rule is for conventional current and electrons travel in the opposite direction to conventional current, so when u wanna use left hand rule u have to take current (conventional) as the opposite of the electron's direction

[@jolyonstokes7176]

Shouldn't the frequency be twice the value you have just stated as it needs to change every half-period?

[@ScienceShorts]

Nope.

[@jolyonstokes7176]

Any further explanation?

[@harrypickard3459]

Because AC Is a sinusoidal wave, it changes direction every half wavelength, meaning that the frequency at which the direction of the current changes is double the frequency of the AC current. Therefore, the frequency of AC has to equal the frequency at which the particle completes its 360 degree rotation, not the frequency at which it passes through a Dee (which would be double, like you said)

[@jackwong4099]

Could you do physics turning points pls for AQA

[@ScienceShorts]

+jack wong Coming soon(ish). Will be done before study leave hopefully.

[@RS-sy1ne]

Dees....Dees nuts:D

[@mjewx1448]

hahaha dees nutz

[@Awai_quotes]

Its not dee's its deez nuts....

[@laitszki4980]

u have missed synchrotron

[@Rocks7]

Dees nuts

[@dineshkurimilla6217]

oh fr, i didnt ask