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- เผยแพร่เมื่อ 30 ก.ค. 2024
- This revision podcast is for Edexcel IGCSE physics or dual-award science (4PH0 or 4SC0), and covers all of topic 6 - magnetism and electromagnetism.
0:13 Permanent Magnets
1:56 Induced Magnetism
2:35 Electromagnets
3:38 Motor effect
7:16 Loudspeakers
8:17 Electromagnetic induction
9:45 Dynamos and generators
11:48 Transformers
14:04 Power Distribution
15:46 Summary
This video replaces the previous revision podcast on my channel with better quality sound and a few updated slides.
Shout out to them people who are watching this video one day before the exams. Good luck for tomorow 👍🏻
how did you do mate?
thanks you too
nah bro, 2 hours b4
0:13 Permanent Magnets
1:56 Induced Magnetism
2:35 Electromagnets
3:38 Motor effect
7:16 Loudspeakers
8:17 Electromagnetic induction
9:45 Dynamos and generators
11:48 Tranformers
14:04 Power Distrabution
15:46 Summary
literally just copied the description of this video
THESE VIDEOS ARE SAVING MY LIFE! GCSEs in 1.5months and now I might actually do well... Thanks Ben!!
I just wanted to say thank you for saving my Physics GCSE, which I sat last summer, but had previously struggled so much with. I am now doing Physics at AS level and intending to carry on with it next year, and I don't think I would have had the faith to do it if it were not for your informative and well-presented revision materials! Thank you so much for doing these videos!!
You're welcome, and thank you for the awesome feedback. I'm currently working on some AS videos, which I hope to publish soon...
The field on the "outside" of a bar magnet is from North to South. If you think about the "inside" of the magnet, the field would be from S to N. You can actually be inside a solenoid - where the field points towards the end that becomes the North pole, and then THROUGH the North pole, so that the field on the outside of the solenoid goes from its North pole to its South pole.
my physics exam is tomorrow :D
Another great video, Thanks!
thanks you! i've got the exam later today and i really needed some clarification on electromagnetism.
Great video! This topic is very confusing so thanks very much!
thanks alot..this really helped me clear my doubts
Thank you for videos!! i feel like i can pass my physics mcas tmr
thx that helped a lot, but can u make an updated version since they updated all the books?
Thanks dude. Good job
I know this is from 10 years ago, but this series has been the lifesaver of my entire school year, because of this series, I was able to get good marks despite studying last minute.
Awesome! Good to know the physics hasn't gone off in the last 10 years!
at 3.30 it says the thumb points in the direction of the magnetic field lines, yet it is pointing from south to north? shouldn't it be north to south?
This absolutely amazing, thank you so much Ben Ryder! I wish you could do this for all my subjects! Does anyone know anyone remotely similar to Ben's podcasts for IGCSEs or good revision websites for especially all the sciences, and core subjects? If theres more than thats good too! Would be a real help for me
Asma science with hazel
Thank you so much...I need an A* and this is really helping me out. You are a brilliant man and again thank you so much for you're videos might have just saved my grades.
Ps. Would you consider making IB physics videos next year, just a thought.
Everyone saying they watching this months before their gcses whilst i have mine tomorrow and this is my first time revising. Bish whaaa 😙 ✌
Better late than never, eh Ben DJ Trix? Time to stop commenting and start making notes, I reckon.
Are the topics you are explaining simplified from The Edexcel IGCSE book? or are there stuff you are adding not from there??
And can you briefly explain how you would know how to position your left hand, by that I mean how would you know if the force is going up and down, left or right
-You are the Best, Hope I ace my mocks
wow... 5 years on and still works great... thanks Ben
9 years
You have just saved my Physics year
You have saved my GCSE
Thank you !! Helped me alllloot :*
Cheers man, great video. Doing my GCSEs next month.
Just one thing - at 6:17, it show a right hand, but should that not be a left hand?
Anyway thanks again
Hmm - it does look kind of weird now! It was supposed to be a left hand, you're right. Thanks for the feedback, and good luck with your exams!
Lenz's Law is not specified in the IGCSE Edexcel syllabus, Nicholas.
hey, at 2 45 when you are talking about the wire, wouldn't the current travel from negative to positive as it is a Real current that we must consider when we talk of magnetic field lines in a current carrying wire.
@Ben Ryder Which is unfortunate as they have just added it onto the CIE syllabus :(
Thank You
These videos helps alot
I don't understand the part about the loudspeaker....
i don't get what is meant by a catapult field
btw thanks for the videos, they are a really big help :)
What about Lenz's law
Thanks from Aminur (Rony bhai)
Im taking the exam tomorrow. Wish me luck! 😖
I don't understand the stuff about the split ring commutator causing the current to flow in the same direction in the coil. Shouldn't the current in the coil alternate?
It was in 6:38
thanks
at 3:37 the right hand thumb rule, wrapped fingers represent the magnetic field lines right? not the direction of conventional current
The rule is reversable in the case of a coil! The fingers can represent (conventional) current and the thumb the field line through the centre of the solenoid. It also works as thumb = current around a single wire, and fingers = field around that wire, which adds up to the first version of the rule in the case of a solenoid.
Uhh isn't the hand used to show "fleming's left hand rule" and 6:18 a right hand?? It looks as if its been flipped because the letters are the wrong way round.. Just thought I should let you know as this confused me greatly until I realised it was the wrong way round! :)
+Abi Sheppard You're right - good spot. Someone else has mentioned this to me in the past, and I will get round to updating the video one day. The fact that you've spotted it shows you're switched on! Good luck with the study.
How does the current travel down into the page in 7:33?????
+amin cousins Imagine a line from your eye towards the screen. Continue that line 'down into the page'. It's hard, because it's a three dimensional problem.
doesnt current flow from negative to positive? cuz the electrons are most concentrated at the negative terminal of the battery (2:40)
Conventional current flows from positive to negative. But in reality, nothing moves round the circuit this way. Electrons move, and they go from negative to positive. Strange, I know.
Does this still mean the the direction of the caused magnetic effect stays the same ?
❤️
Can I use these videos for CIE IGCSE's
Yes. But watch the *extra* videos that cover the content in CIE and not in Edexcel. There is very little that works the other way (i.e. in Edexcel but not in CIE, but I've pointed these small bits out on the CIE videos)
If current flows from positive to negative , and current is a flow of electron... but electron flows from negative to positive!!! Why is it opposite all around!! Can u explain this ???!!!
its because ages ago it was believed that the current travels from positive to negative, but when they discovered atoms and that its the electron that actually carries the charge not the proton, they realised it was wrong but they decided to keep it and call it conventional current, the flow of electrons however is from negative to positive
my exams in 1hr hahah
Is there anyone who's here before few hours of exam???
you are jesus