I wish the best of luck to the people, including myself, that are learning the content just before the exam.

@zhelyo_physics

Жыл бұрын

Good luck! Drop a comment, if something doesn't make sense!

@jayabrahim

Жыл бұрын

good luck man

@naimul1626

Жыл бұрын

ong bro good luck to you

@sayramahmud4397

2 ай бұрын

Big exam tmr!!! Thank u for this ❤️❤️

this man carries my physics grades. your videos are a great revision source. thank you :)

@zhelyo_physics

Жыл бұрын

my pleasure! Thanks a lot for the comments and good luck on any exams!

@justaracoonchillinginatoilet69

Жыл бұрын

@@zhelyo_physics thank you so much :)) also i have a question regarding transformers. is the emf induced in the secondary coil alternating voltage or no?

@zhelyo_physics

Жыл бұрын

yep alternating p.d., the magnetic flux around the secondary coil is changing and that enduces a changing e.m.f.

@justaracoonchillinginatoilet69

Жыл бұрын

@@zhelyo_physics thank you for the help. also sorry i have another question, how would i answer this spec point? im a bit lost "understand the factors affecting the e.m.f. induced in a coil when there is a change of current in another coil linked with this coil"

@zhelyo_physics

Жыл бұрын

@@justaracoonchillinginatoilet69 that's basically just a transformer and it involves: 1) the rate of change of flux in the primary coil which affects the secondary coil 2) the number of turns ratio described in the equation for transformers in this video. Occasionally they might put a trick question like what would you see if you ran a DC current through the primary coil - a short pulse of current followed by zero current (the short bursts is due to the change on primary from 0 to some DC current and then change again back to 0 )

Next step: practice questions walkthrough: kzread.info/dash/bejne/gGyet8dqdLPbfto.html Hope this is useful! : )

FBI is the best way to remember Fleming's left hand rule. F = force (thumb) B = mangetic field (index finger) I = current (middle finger)

@zhelyo_physics

2 жыл бұрын

that's so good! Thanks, never heard of this!

@ogaremmanuel1669

Жыл бұрын

So grateful for this , thank you sir

@mofazzalhossain2944

Жыл бұрын

❤ thanks.

@gilbyjackson304

Жыл бұрын

ahahaha damn thats much easier. I've been literally just using ForceField Current, and remembering because it sounds like something out of starwars ahahaha

@raiderrayschannel2712

7 ай бұрын

FBI open up

revising for my board exams right now, although this is for OCR, it is immensely helpful for CIE as well, thank you so much!

@zhelyo_physics

2 жыл бұрын

Anytime! Glad to hear, the core content in most exam board is very similar. Good luck with revision!

@gauthampaul4213

2 жыл бұрын

@@zhelyo_physics Thank you sir!

@puddleduck1405

Жыл бұрын

how did it go

What a lecture! Hats off. Helped me real good.

@zhelyo_physics

2 жыл бұрын

Thanks a lot! Glad it helped!

You are insane, helping me finish my a level physics faster! Cheers boss

@zhelyo_physics

Жыл бұрын

Anytime!

Best lecture on electromagnetism. Keep up the good work Sir✌✌

@zhelyo_physics

2 жыл бұрын

Thank you!

You should definitely do a video on Hall Voltage, as I see that it is missing. These videos are amazing!

mocks coming up, this is very handy :)

@zhelyo_physics

2 жыл бұрын

Good to hear! Good luck on the mocks!

Thank you so much bro. I have A level physics exam today , paper 2, and your video helped me a lot to understand electromagnetism. Lots of love for you bro❤️

@nubbbbbbbbbbbbbbbbbbbin

2 жыл бұрын

same, good luck my guy

@Subscribe-HelloUK

2 жыл бұрын

How was the paper??

@justaracoonchillinginatoilet69

Жыл бұрын

@@Subscribe-HelloUK guess well never know

My favourites channel for a level physics. well explained

@zhelyo_physics

2 жыл бұрын

Thank you! Much appreciated!

Wow wow wow ,I am amazed ... You did an incredible work here ...now I can finally understand magnetism🎉 . God bless you sir ,continue with the good job 🎉🎉

@zhelyo_physics

8 ай бұрын

thank you so much for such a kind comment! So glad this is helpful!

lovely stuff thank you sir, actually quite similar to AQA spec as well !

@zhelyo_physics

2 жыл бұрын

Anytime! Physics is physics : )

Thank you so much for the amazing video!

@zhelyo_physics

Жыл бұрын

anytime! thanks a lot for the comment!

Thank you very much! You have once again helped me improve my physics grade!

@zhelyo_physics

8 ай бұрын

anytime! very glad this is useful!

best channel ive come across since you cover the same board and teach brilliantly, thank you very much. lets not forget the drawings too lol.

@zhelyo_physics

2 жыл бұрын

Thanks a lot! Really glad to hear this : ) Good luck in revision!

Fantastic Video, Thank you!!

@zhelyo_physics

2 жыл бұрын

Glad it is useful! Thanks! : )

Thank you for this great resource!

@zhelyo_physics

Жыл бұрын

Anytime! Thanks for the comment!

Thanks so much, this helps a lot!

@zhelyo_physics

2 жыл бұрын

Anytime! Glad to hear!

Best video on the subject I've watched

@zhelyo_physics

Ай бұрын

thank you so much for the comment! Much appreciated!

Yoo really neat lecture. Good job

@zhelyo_physics

2 жыл бұрын

Thanks a lot! : )

Best A Level Physics channel

@zhelyo_physics

2 жыл бұрын

thanks a lot! Much appreciated!

final is tomorrow, thank god for this video

@zhelyo_physics

2 жыл бұрын

Good luck!

I religiously recommend this youtube channel to my friends lol, no other channel compares to the understanding I gain from you bro

@zhelyo_physics

Жыл бұрын

Thank you so much! I really really appreciate this! Deep understanding of physics is precisely the goal of this channel. Thanks!

Is this called 40 minute magic??? Thank you sooo much sir God bless you. And pls pls pls keep uploading more videos

@zhelyo_physics

Жыл бұрын

Thank you so much for the kind comment and glad this is useful!

POV it’s 3 hours before the exam

@Amnah_Umar

2 ай бұрын

my dude it always is

20:32 I’m pretty sure the diagram next to it on the right is the one where the field line is parallel to the area sir!

@zhelyo_physics

6 ай бұрын

excellent question, parallel in the context of the angle shown is parallel to the normal of the area, not the area itself. It's a tricky point. Hope this helps!

Outstanding lecture 👍👍👍

@zhelyo_physics

2 жыл бұрын

Thanks a lot!

Your Videos are just soo good

@zhelyo_physics

Жыл бұрын

Thanks a lot! Much appreciated!

I love it for simplifying it that way thanks

@zhelyo_physics

7 ай бұрын

anytime! thanks for the comment!

Really Helpfull💯👍

@zhelyo_physics

2 жыл бұрын

Glad to hear! : )

Sir, thanks a lot. Your videos are helping me a lot. I am revising all the syllabus of physics with the help of your videos which is my life savior. Can you please upload a revision video on Alternating Current (AC) it will be very helpful for me Thanks 😃😄

@wofaiibor3353

2 жыл бұрын

Same here,i really found this topic complicating but thanks to this 👍 unique teacher.

@zhelyo_physics

2 жыл бұрын

@@wofaiibor3353 Thanks a lot!

Hello sir, did you make a video on the graphs that are in EM induction B VS T graphs, the ones with the weird shapes, sometimes rectangle etc

Nice one dude

@zhelyo_physics

2 жыл бұрын

No Problem

For the magnetic field around a solenoid, how do you know for sure which end is the North pole? Is it the right hand grip rule, because when I try to use that my direction for the magnetic field changes depending on which end I look at (if the current is going up or down).

@zhelyo_physics

Жыл бұрын

Hi, I have covered this here: kzread.info/dash/bejne/eYitrMWMqqe-qrw.html

7:28 Using Right hand grip rule on the diagram, wouldn't the North-pole mentioned in the video be South-pole instead and vv? According to the fact that the for a cross sectional area of a solenoid, if the current is flowing anti-clockwise, it is North end of the pole and if it is flowing clockwise, it's the South-pole, the diagram is again reversed.

@zhelyo_physics

2 жыл бұрын

Excellent question. The field is definitely correct. Some further drawings can be found here: hyperphysics.phy-astr.gsu.edu/hbase/magnetic/solenoid.html Best to think of the field of a single ring, which is also explained here: hyperphysics.phy-astr.gsu.edu/hbase/magnetic/curloo.html Hope this helps!

@madarauchiha8508

2 жыл бұрын

@@zhelyo_physics hmmm. As the coil is drawn in 2d, I feel this is one of those cases where you can't tell the whether an object is closer to you or not. Taking the side that I first viewed closer to me as the farther one is definitely helping.

@madarauchiha8508

2 жыл бұрын

@@zhelyo_physics Nonetheless, great video. Helping me through my OCR revision.

in the edexcel book they used Φ=BAsinθ instead of cos. so i guess the graph here 32:15 would be different too, since sin90=1?

@zhelyo_physics

Жыл бұрын

Yep! Correct, I teach OCR and the angle is defined in terms of the normal. If they used the sin graph it would be defined in terms of the surface which makes total sense. The graphs would look the same, just shifted by 90 degrees. Thanks for your comment, very useful to know how various exam boards define quantities.

Great video thanks!! Would it be possible to do a video on the possible experiments for elctromagnetism please? Your materials video was very helpful.

@zhelyo_physics

2 жыл бұрын

Great suggestion! I am working on it, however just to mention that the possibilities with electromagnetism are almost endless, but hopefully it will still be helpful in terms of a general direction.

@xavierbritz

2 жыл бұрын

@@zhelyo_physics Yes it will be helpful! Thanks

Thank you!

@zhelyo_physics

2 жыл бұрын

You're welcome!

for 33:25 , if we have to find the emf, would we have to draw a tangent at that point, and then find the gradient of the tangent?

@sungdripwoo7887

Жыл бұрын

yh

03:53, shouldnt the filed lines on the fiest wire be going anticlockwise?

So, if I understood BILSinTheta correctly, then the electrons move in a spiral in the direction of the current flow?

Sir could you please do a video going through electromagnetic revision exam questions these videos are so helpful !!

@zhelyo_physics

2 жыл бұрын

Hi! Check out the community post I have just done, I have recorded virtually all recent questions and summarised them in links to the past paper videos, hope this is useful!

@rachelle9518

2 жыл бұрын

@@zhelyo_physics omg thank you so much your video helped me understand the topic so much !!

@zhelyo_physics

2 жыл бұрын

Anytime! Glad to hear!

thankyou soo much

@zhelyo_physics

Жыл бұрын

Anytime! Thanks for the comment!

5:31 ruler jumpscared me lol

7:07 ....but wouldn't the magnetic field be travelling from A to B in the front and B to A in the back , since they have to run a full circle. So why did we assume only the first case to be the answer ?

@zhelyo_physics

2 жыл бұрын

Just a matter of reference point. Looking at the diagram as it is drawn in the picture we can describe the field as going out of the page/screen at A and into the page at B . An alternative way to think about it outside of the diagram shown is to imagine a wire with the current going into the page, the field will then be circular with a clockwise direction. Hope this helps!

@zhelyo_physics

2 жыл бұрын

Excellent question by the way!

23:00 wouldnt you need to do a bit of trig to find the area

@crazykid073

Ай бұрын

No, just 90-55 to get angle subtended by normal, then times area by cos angle Think of the cost part as working out the fraction of the area that is 'in the right direction'

Excellent drawing Z. I appreciate the video as always, helping me prepare for next months exam....

@zhelyo_physics

Жыл бұрын

Thanks!! Glad it's helpful, good luck on the exam!

Life saver

@zhelyo_physics

3 ай бұрын

Thank you for the comment!

i saw very good thing on you. this vid initiate some ppls like me

appreciate your drawing

@zhelyo_physics

2 жыл бұрын

haha thanks! It took a while! Difficult to teach a 3D concept on a 2d surface.

hi sir, what do we need to know for an AC generator (OCR A)? do we need to know the brushes and slip rings? or just that the rotation of the coil causes change in flux therefore emf and current induced?

@zhelyo_physics

Ай бұрын

we need to understand the principle of operation, in terms of basics of electromagnetism and changing of magnetic flux linkage. Brushes, slip rings are not on the specification. If something like that appears it may be part of a diagram or context set within the question. Hope this helps!

@kausarlolz

Ай бұрын

@@zhelyo_physics great thank you sir

5:43, please was that Fleming's right hand rule,am confused

@zhelyo_physics

2 жыл бұрын

yes, correct!

Why haven't you included the hall effect and the current balance method?

@zhelyo_physics

2 жыл бұрын

Hello! They are not part of all exam board specs.

Hi!! Thank you!! It has helped so much!! Have you got anywhere I can get the notes?

@zhelyo_physics

Жыл бұрын

anytime! Sorry only the videos are available, I do encourage students though to use them to make their own notes.

@vidstar123

Жыл бұрын

@@zhelyo_physics okay thank you!!!

thanks

@zhelyo_physics

2 жыл бұрын

Anytime!

tysm

@zhelyo_physics

Жыл бұрын

Anytime!

What kind of practical skills could they assess to do with Electromagnetism?

@zhelyo_physics

2 жыл бұрын

million dollar question! I will make a video about it but the best thing to do would be to know the spec inside out, then, solve all the available problems. In short things could appear include - any situation in which there is a changing flux, creating an emf, or lots of things including oscilloscopes or graphs and gradients.

I hate magnetism; praying to god that there isn’t a 6 marker on magnetism in OCR P2 or P3

Another way I use to remember 11:33 Fleming's Left Hand Rule is "FBI"

@enbunnymoarmy5912

2 жыл бұрын

ohh just saw someone else commented this already haha

@zhelyo_physics

2 жыл бұрын

Thanks for mentioning it! Before the comments I had somehow never heard of it before : )

Hi again, at 3:10 'current' into the screen is a cross, but at 13:51 a cross is the 'magnetic field' into the screen, just wanted to clarify why that is different?

@zhelyo_physics

Жыл бұрын

excellent question. So the cross is the direction only and not the quantity that is in question. Think of it as an arrow that could signify things like current, force, magnetic field etc. The only difference from an arrow drawn on the screen is that this arrow is into it. Hope this helps!

Is there any way we can get this revision pdf

@zhelyo_physics

Ай бұрын

Sorry only the video is available. Hope all makes sense, drop a comment if something doesn't.

What do they mean when they say the core of a Transformer is laminated?

@zhelyo_physics

5 ай бұрын

The core links the primary and secondary coil. Normally it's a piece or iron, however often you get Eddie currents within it and laminating the core (usually with a high resistance materials) reduces these currents and the efficiency . Hope this is helpful!

Exam is in 9 hours and 25 minutes, we are getting in uni!!!💪💪💪💪

1:15 why is the the North Down and South up while it should be the opposite

@zhelyo_physics

Жыл бұрын

The magnetic South Pole is at the geographic North Pole. So the North Pole of a magnet is attracted to the south magnetic Pole and points towards it. Basically they are reversed.

at minute 32.00 why does the normal change ?

@zhelyo_physics

Ай бұрын

so the normal to each side of the surface is almost like a ruler that has been glued vertically to stick out of a surface. As the surface rotates the ruler will change its position. Hope this helps!

which software is this

@zhelyo_physics

2 жыл бұрын

Microsoft Whiteboard

4:10 damn good drawing tbf 😭😭

@zhelyo_physics

2 ай бұрын

ahaha thank you!

is Motor effect in the ocr spec?

@zhelyo_physics

4 ай бұрын

the spec doesn't call it the motor effect persay but yes the principle is there.

Is this video alone enough for the exams?(With ofcourse Past Paper practice)

@zhelyo_physics

Жыл бұрын

I would also have a look at any teacher notes and the syllabus to make sure you have covered everything. I also have a video on electromagnetism experiments I would add to this. Good luck!

Wow

If you were a stock, I'd invest in you rn!

Why do they teach Flemming's Left Hand rule at school? At uni right now all I ever use is the right hand rule for all cross product based stuff including EM. What's so special about Flemming's Left Hand rule?

@zhelyo_physics

Жыл бұрын

I agree. Most likely historical reasons. From uni I just tended to remember the cross product rule which together with some intuition about vectors is very powerful.

Am I the only one noticing the drawing for a magnetic field around a current carrying wire is incorrect? If the current going into the screen creates a clockwise field, and the current (as originally drawn before he adds the second arrow) is shown traveling from left to right and out of the screen, the fields should be going counterclockwise but they’re not, they’re going clockwise.

@zhelyo_physics

18 күн бұрын

Hi, let me have a look. After browsing I don’t see a mistake, but if you let me know which time exactly I will have a look. Thanks for watching!

What's "A level" in your country? I keep seeing this term but does this mean college level or high school? I'm from USA, sorry

@zhelyo_physics

Жыл бұрын

Sure, it's very similar to an AP course in Physics in the States, but non-calculus based.

30:04 there is no link in description

@zhelyo_physics

3 ай бұрын

Hi, it's there you should be able to see it. It's got a heading Lenz's Law Detailed video.

is this a part of as level?

@zhelyo_physics

Жыл бұрын

Nope. A Level only.

For what exam board is this?

@zhelyo_physics

Жыл бұрын

Applicable to all. Always check with your spec for minor differences.

@Nomanqasim11111

Жыл бұрын

@@zhelyo_physics alright thankyou

@zhelyo_physics

Жыл бұрын

anytime!

Is all of this a part of 2023 syllabus please tell me

@zhelyo_physics

Жыл бұрын

Which exam board exactly? I recommend googling the syllabus and using it as a check list. One of the best ways to revise. Whichever exam board it is, chances are it would be extremely similar.

@Anzaedits

Жыл бұрын

@@zhelyo_physics A-level Cambridge

@zhelyo_physics

Жыл бұрын

www.cambridgeinternational.org/Images/554625-2022-2024-syllabus.pdf syllabus is right here, it is virtually identical up to AC currents : ) Good luck revising!

I write my physics exam today ;-;

@zhelyo_physics

2 жыл бұрын

Good luck! You've got this!

@naniidoodles

2 жыл бұрын

@@zhelyo_physics Thank you!

Who's here cramming the day before the exam?

@zhelyo_physics

Ай бұрын

Good luck!!

I love transformers

@zhelyo_physics

2 жыл бұрын

It's a pretty good film : )

@sia1234

Жыл бұрын

@ZPhysics this channel is a good place to pun😭

Father( force)mother *magnetic field )child (current )is better

so, who else is here preparing for tomorrows exams

+++False! There are no 'field lines. Stop confusing lay ppl including many professional. What 'field lines' are, are 'magnetic equipotential lines' which is another way of saying 'lines of same strength within the field' or 'lines of same energy density within the field' [akin to isobars. And, since there is no 'flux' [as commonly defined' 'flux density is another misnomer' I've just demonstrated the gross misunderstanding academia has of physical sciences. What are the Properties of Magnetic Field Lines The tangent drawn to the magnetic field lines gives the direction of the magnetic field. The closeness or density of the field lines is directly proportional to the strength of the field. Magnetic field lines appear to emerge or start from the north pole and merge or terminate at the south pole. Inside the magnet, the direction of the magnetic field lines is from the south pole to the north pole. Magnetic field lines never intersect with each other. Magnetic field lines form a closed-loop. Field lines have both direction and magnitude at any point on the field. Therefore, magnetic field lines are represented by a vector. They denote the direction of the magnetic field. The magnetic field is stronger at the poles because the field lines are denser near the poles. Obviously mostly wrong. You are so full of yourself [self-important]! === I'm formulating the PARALLAX ELECTRIC THEORY which dispenses with the idea of magnetism which is but a historical anachronism, a misnomer, for matter having structured/organized polarity [positive and negative charge] via matrix/lattice/crystal/geometric-molecule/alloy units [depending on it's construction]. The concept of mag lines of force is another antiquated anachronism. In support of the aforementioned, all electric and magnetic fields are measured using the same equipment - magnets, coils, etc. ++++++So You Think You Know Physics. The Big Misconception About Electricity [Veritasium] - kzread.info/dash/bejne/lHx9ysmxkdmffLw.html

bad