Magnetic Fields, Flux Density & Motor Effect - GCSE & A-level Physics (full version)

[@kyliek.9481]

8:01- RH rule 8:40- motor effect 9:36- LH rule 😂 13:20- fred=bil (the force a wire feels when it is in a magnetic field) 14:01- using the LH rule 16:00- experiment: use electron balance to measure effect of length and current on force Ps. Don’t delete this comment, I marked the times for easy reference so I can study fast 😄. Thanks for the video

[@mohamedosmanibrahim1736]

For anyone who cant remember which finger represents what for the left hand rule, use FBI so first finger force second finger magnetic field B and last is current I

[@Ashley-uz2gw]

We got taught that too, our teacher just kept shouting "FREEZE, FBI" whilst doing the left hand rule as if it was a gun

[@earlibee]

can i safely assume that magnetic flux density is the same as magnetic field strength?

[@encheng2664]

i learnt it via FMC - first finger F stands for Father, second finger M stands for Mother, third finger C stands for Child Father Mother Child

[@anhumblemessengerofthelawo3858]

if you can't remember the left or right hand, there's really no point in trying to memorize ....

[@arulgk9673]

@@encheng2664 Nice!

[@arulgk9673]

I really want to express my heartfelt thanks to you as you've taught me what my teacher was trying to teach for 2 weeks, in just 20 minutes.

[@தமிழ்-ச9ஞ]

Dravidana? Tamilana?

[@afatsquirrel1853]

How did a level go? 🤣

[@mrvido2865]

Science shorts, I am forever in your doubt .... the Cyclotron you explained in full details with the derivation of it , and the magnet on the balance and finding magnetic flux density and many more ... the exact same scenario Came to the AQA exam paper 2 ... I couldn't do them if it wasn't because of your help. I really hope something really good happen in your life because you have just made my hope of getting an A grade in ALEVEL physics to come alive again . Thanks a lot

[@ScienceShorts]

+Nima the leagend Nimatheleagend That's great to hear! Glad it helped :)

[@HasanZobaer]

you mean debt right? xD

[@gyuiyt7807]

I love you. I've been dreading this topic so much that even crash course physics couldn't help me. You've really helped me understand though. Thanks!

[@arulgk9673]

Same!

[@nastya_is_slay]

I'm usually not the best at concentrating (adhd things), but your videos got me hooked up! I've been watching non-stop for 3 hours, so easy and clear, thank you for your work!

[@simarjeetsingh4600]

For the flemings left hand rule, u can use the following to remember what the fingers indicate: Father: Force(thumb) Mother: Magnetic field direction(index) Child: Current(2nd finger)

[@ubaidshah1910]

Or FBI F=force B= b field I= current

[@c48productions]

Just discovered this channel really useful in-depth revision material thankyou

[@hakaishinxero7944]

Clem Edwards trttftffr

[@ignatiusmudzviti5015]

fact

[@apollocomet9590]

I don’t have 6 fingers so does Flemings left hand rule still work for me?

[@ignatiusmudzviti5015]

you only use 5 fingers ,jezz infact there are only 3

[@JohnDiggle21]

@@ignatiusmudzviti5015 r/woooosh

[@azharhaque9]

Rip

[@realchestro2986]

Obviously a joke

[@tahsinrahman1668]

@@realchestro2986 you don't say

[@Mking99999]

Hi, my teacher recently showed a nicer way to remember flemming left hand rule being that, your hand looks like a gun so you must be the FBI. Then just remember it in that order being F(Thumb) B(Index Finger) and I (middle finger). just a little easier way to remember. Great videos man keep them up, hopefully i can bag an A in physics because of you. Thanks man

[@TheDerpyWerp]

What grade did you get in a level physics in the end?

[@drnojtm2598]

Quick way to remember what hand rule to use. Right hand rule is generating so its basically gene-right-ing. IM very late to this video but wow is it helpful - A-levels in 2 weeks and looking over last years papers i need to do a lot more work.

[@arulgk9673]

Hope it went well

[@vdabest2118]

I just got a “Physics Online” ad on a “Science Short” video 😂😂 They should do a revision battle....

[@ScienceShorts]

Ooh, fancy! Some of us aren't flush enough to afford ads 😅

[@vdabest2118]

Science Shorts 😂😂😂 I don’t think you need ads, the video quality field strength is strong enough to attract the students. (Can’t believe you actually replied 😭)

[@Barowiec]

I've watched multiple other videos, but this one actually explained what is going on in detail

[@krishak8329]

Uk and Ireland at 3:37 had me dead 😂😂

[@amrsalem1260]

Imagine being in a gcse exam and pull out a left hand rule. Inspectors around you will think that youre pulling up some gang signs.

[@pixiedust1383]

This is awesome, I love your videos. Do you think you could do a video with key word definitions for every topic? I feel like it'll help a lot of people cause key words are a pain and difficult to remember.

[@fatima-oy7gk]

@scienceshorts yes please

[@rajaharzaai420]

This is premium content.This channel is so underrated.

[@ScienceShorts]

Spread the word 😉

[@busyinverse4300]

this is called the perfect lecture, made us study with 100% concentration, but even made us laugh during left hand rule:))))))

[@ryancouchman-sawyer2355]

Well I'm glad that I found this the night before my exam!

[@vdabest2118]

Shout out to his Fleming Left Hand 👏🏻

[@edsheeran1941]

my physics teacher kinda sucks so i often find myself teaching the material to myself. needless to say this channel has greatly helped with that so thanks a lot

[@Samld1200]

I like the drawing of the globe at 3:20. Got all the important bits

[@ananyamalasane8073]

The video was great!! In detail as well ... I had a doubt: In the example, we need to think in a way that the wire will experience an upward force and instead the magnets will be pushed down as the wire is fixed. Why do we not consider the force to be moving downwards itself ? Thank you.

[@jxffa1878]

Why do you want the force to go upwards (away from the scale) and not just directly down into the scale?

[@younedward]

Thank you for the nice explanation! But I think I prefer to think right hand rule for the direction of the force. We can keep our thumb as the direction of the current (as in the original right hand rule), then point with index finger towards the direction of the magnetic field, which leads your palm to face the direction of the force :D

[@ScienceShorts]

+younedward 0_o

[@ezginingunlugu3247]

finally found the perfect explanation, helped a lot!

[@nishadylan]

The best physics channel.

[@ScienceShorts]

+Dylan Vadher Cheers!

[@mohamedosmanibrahim1736]

Hi Science shorts great vid as always, my question is at 16:45. why is the force acting on the wire upwards if you want a downwards force on the scale to get a reading? thanks :)

[@ThePaperCreater]

Newton's 3rd law I think

[@mariyashandle]

thank you so much for your work! A-Level Physics is super hard for me and my teacher's really difficult to deal with. Your videos help a lot Much appreciated :>

[@annaisabanana6848]

videos like this are gonna get me into uni. thank you!

[@kaasseyy1]

such a helpful guide which actually related to OCR SPEC A (new spec)

[@harrycalvert6468]

This was super helpful but I just couldn’t stop laughing when I looked at the hand you drew for Flemings left hand rule

[@ScienceShorts]

WHY DOES EVERYONE HATE MY HAAAAND :'(

[@seasnek7024]

I remember the rule as my right-hand fingers (out-stretched) as the Magnetic Field B, my thumb as the Direction of Current, and my palm as the Force as if you'd slap something.

[@theComput3rNerd]

For anyone who cant remember which finger represents what for the left hand rule, use Father, Mother Child, so first finger force second finger magnetic field B and last is current I

[@supremeicecreme1658]

From GCSE, I remember the Left/Right hand rule fingers with "My Furry Cat". *Thumb:* My - Motion *First finger:* Furry - Field (magnetic) *Second finger:* Cat - Current

[@HT-lr1rs]

I'm not even A level just puzzled by magnets u really helped simplify

[@a.m826]

You made it super easy to understand in a short time, thank you so much man!

[@k1ng724]

Easier way to remember left hand rule is (from thumb first finger then second) FBI -> force (F), Flux density (B) , Current (i)

[@wakilahmed7211]

Many many Thank you sir.. I have caught all the concept from this video.. Take love❤️🇧🇩

[@manavmnair6975]

Shortcut to remember left hand and right hand rule Thumb-index-middle fingers are Force(F), magnetic field (B) and current(I) Which is simply FBI

[@realchestro2986]

I'll be writing this in 8 hrs time, I'm now in a better position so thank you.

[@بنتأنصار-ح4ذ]

Thank u soooo much!! Please can u do a video on vector diagrams and calculating magnitude/direction for GCSE

[@moustafatayyan4318]

In the experiment part Why does the magnet move downward

[@Fortnitebawls8]

Hello, at 17:07 do the forces follow Newton’s third law. As you stated equal?

[@solangelalebron1348]

Quadrupole magnets, abbreviated as Q-magnets, consist of groups of four magnets laid out so that in the planar multipole expansion of the field, the dipole terms cancel and where the lowest significant terms in the field equations are quadrupole. Quadrupole magnets are useful as they create a magnetic field whose magnitude grows rapidly with the radial distance from its longitudinal axis. This is used in particle beam focusing.

[@HMPGENERAL]

day before exam revision whooosh

[@Joel-fu4fu]

I remember left hand rule as FBI - from thumb to middle finger force b field current

[@sultansaeed924]

we need to make a petition for science shorts to get praised by the queen and gets that sword on the shoulder thingy

[@ScienceShorts]

Lol, 'knighted' is the word you're looking for.

[@mevinimunaweera9841]

Thank you so much😊Great explanation and memorizing methods are also easy👍

[@justineedad5158]

These videos are way too good. forever grateful

[@gabee1687]

can we explain why does the geo. North of earth is also its South magnetic pole and vice versa. Like if the magnet points towards the north then why is it the south of the earth?? Is it like the examples you made like the one with two aligned magnets? Thankyou to anyone who helps me understand this

[@yusufjim]

Thanks for the informative video - I was wondering if you've made any videos which refer to hall probes (part of magnetic fields/flux)

[@sineaddean4718]

Thank you, really cleared things up!

[@Aruna-gx2im]

pls make a video on terrestrial magnetism (including the magnetic dip or inclination and declination).

[@emmacole2296]

In the practical why do you want the force to go up rather than down?

[@christmas9259]

Why does it being the magnetic north and magnetic south pose a problem?

[@angelinoz5159]

This is a great explanation, as always. I do want to ask you that what effect is exerted on a compass needle owing to its proximity to a current carrying wire? Please guide.

[@cinnamontoastfuckisthis]

You’re a life saver

[@shahadamjad3691]

thank you for the helpful content ! i truly appreciate your work

[@seshachary5580]

very educative. Thank you Regards

[@musfirahniyas621]

Helped me alot. Thankyou keep doing this grt work

[@peterkyeremeh4416]

That was so great. Thumbs up !!

[@thiccteletubby1234]

your perspective drawings are insane!!🥵

[@8mycereal]

THANKSSSS it was very fun and educATIONAL a starrrr coming SOON

[@trompbakker9545]

This was really easy explained. 🙏

[@fab4fan173]

Brilliant explanation. Thank you!!

[@vibertmingo9997]

This is really good

[@foooi5suki723]

Have you done angle of dip and declination

[@mydabashir6581]

THANK YOU SO MUCH! THIS IS REALLY HELPFUL

[@meowchikawowow]

UHAAAA THANKS SO MUCH SIR ! heres my thanks! muah~

[@Mozzie7920]

16:38 wait why do we want the force to go up?

[@tobybrown4861]

A quick way to remember Flemings left hand rule is using FBI, Force for thumb B for first finger (field lines direction) and I for current direction, but it comes at a cost because everytime you use this you have to shout FBI OPEN UP, use with caution

[@brianfinnegan9700]

Incredibly useful video, thank u Sir

[@Fatimaiqbal2006]

Jazakallah Khair

[@barisstudio1522]

Thank you very much, this was really helpful!

[@Mono_Autophobic]

I have no teacher due to lock down you are my hope

[@JohnDiggle21]

Everyone talking about the FBI method to remember the left hand rule, but I prefer the one showed here (it's the one I was taught since GCSE)

[@williamstorey5024]

What factors increase the density of flux in a magnet?

[@floralynphea3400]

Thank you so much!! I finally understand it! Thank you sir

[@ibrahim.700]

I can safely assume that I can get an A in physics because of your videos! Thanks!

[@lissyjones9684]

Very helpful video. It threw me off when you changed jumpers half way through though.

[@InTheBeginningTheUniverseWas]

I always remember the thumb as movement because thu _M_ b = _M_ ovement. Its about as tenuous as se _C_ ond = _C_ urrent... but it works somehow.

[@hrperformance]

Why is it that the magnetic flux density is so high (in the example @ 18:21) when the numbers you plugged in seemed so benign? Can I create this flux density at home?

[@Galactorate]

what exists between the lines of magnetic fields?

[@aventura1266]

feel so sorry for aliens tryna do these hand rules

[@MA-uu5ng]

Can anyone tell me what flux linkage is? Thanks

[@bleachedblue]

Hi, on the equation B=mg/IL You wrote out the following 0.05×9.8 / 1x0.1 I'm confused as to where the 9.8 came from as I haven't seen an explanation or may have missed it. Can you please explain, or perhaps someone from this community. Thankyou, B

[@MH-wh9ek]

if you have a mass then the force would be its' weight. F= ma and the acceleration caused by gravity is 9.81 which is where the 9.8 comes from so on earth F = 9.81 x mass

[@jahnvi4942]

4:15, I thought the magnets are the ones that are different, not the geographical poles. My teacher told me that north-facing magnet is actually the south pole of the magnet. Is this true? pls help

[@ScienceShorts]

This makes literally no sense.

[@braxma12]

why is my starting current increases in the circuit, if I used bigger stronger field magnets for DC motor (stator)? Have exam on Wednesday here...

[@ezikwa]

At 18:10 mins....how did we get the 9.8 in the equation? What does it represent? Thanks

[@xkl-physics7287]

9.8 is gravitational field strength of the Earth. So multiplying mass (shown by top pan balance ) by this gives us the force exerted onto the magnet 🧲

[@jebnai7445]

So you're saying that if the wire experiences a force but it isn't free to move, then the magnets will experience the same force but in the opposite direction?

[@ScienceShorts]

Yaas.

[@wanstudent4502]

@12:46, is it cos? If θ = 0 (angle between current and field direction), then cosθ would be 1. Shouldn't it be F=BILsinθ? So when θ = 0, sinθ will be 0.

[@John-ti8bf]

Fantastic review clips

[@xkl-physics7287]

17:03 is this due to Newtons 3rd law: two objects that interact exert a force equal in size and opposite direction on eachother

[@ScienceShorts]

Yep!

[@ziotic279]

@@ScienceShorts How would Newton's 3rd law apply? what is the wire exerting a force against? Is it not travelling in the upward direction? I would understand if the force on the wire acted downwards on the scale and there was a reaction force upwards, but I'm not sure why in this case a force upwards would result in a force downwards.

[@v6790]

@@ziotic279 the wire is stationary, you can assume they are being held by clamps on both ends, and since it's stationary, the upwards force is equal to downwards force.

[@bonniem1865]

Thank you ❤️❤️

[@jonpt2941]

Hi, I don't understand how u got the 9.8

[@bucwildsfightclub9941]

what happens to the mass if the direction of the current is reversed?

[@sandaninavodya4969]

Thank u very much sir🫶

[@旺仔-h8i]

Thank u so muchhh! !!

[@imogen9137]

Really helpful thank you!! 😆

[@ellayard8968]

This is in gcse triple now