GCSE Physics - Generator Effect / Electromagnetic Induction #81

This video covers:
- The idea that the movement of a wire within a magnetic field induces a potential difference, and that this may lead to a current if the circuit is complete
- How we can increase the size of the current
- What happens when we place a magnet inside a coil
Exam board specific info:
AQA - Separate/triple science and higher tier only
IGCSE Edexcel - Everything is relevant to your course
Edexcel - Separate/triple science and higher tier only
OCR 21st Century - Separate/triple science only
OCR Gateway - Separate/triple science and higher tier only
Maths Playlist:
• GCSE Maths (9-1)
GCSE Chemistry playlist:
• GCSE Chemistry - Atoms...
GCSE Biology Playlist:
• Video
GCSE Physics Playlist:
• Video

[@xosbabymama4703]

I hate magnetism

[@popopopopop45]

I've been trying to understand it for the past two weeks and don't understand anything

[@artmakeslifebeautiful8594]

Same

[@nawerhoque911]

@@popopopopop45 i have good notes for it if u want i can mail it to ya

[@Tils17]

Bro woke up and decided to spit fax

[@Abxhj2939sjsj]

Worst topic by far

[@alanaknox49]

this is great-- my teachers keep making us watch freesciencelesson videos but im gonna tell them about this, such an easy to understand presentation of the info!

[@Cognitoedu]

Thanks Alana 🥳

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Ikr those are shitty idk why so many teachers are so goddamn obsessed with them tsk tsk Edit: my bad for condemning freesciencelessons. Just because it's slides are a little outdated in design doesn't mean it's bad.

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@@yj5160 hey, freesciencelessons isn't bad; both are equally good teachers, u should respect both of them.

[@camalex7782]

@@krish4134 but this guy has better graphics

[@kenmc1448]

This is probably the simplest and clearest electromagnetic induction explanation I have ever heard. Bravo!

[@Cognitoedu]

Ah thank you Ken, glad it helped 😊

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Thank you Chiara, we really appreciate it 😊

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[@Cognitoedu]

If you’d like to practise what's covered in this video, check out the lesson on the Cognito platform - cognitoedu.org/coursesubtopic/p2-gcse-aqa-h-t_6.06. The platform’s totally free, and has been built to make learning and revision as easy as possible. The main features are: - Lessons organised by topic, only the lessons relevant to your specific exam board and tier are shown. - Automatic progress tracking. Progress bars tell you what you’re doing well at, and what you need to spend some time on. - Practise quizzes so you can test your knowledge. You can quiz yourself on any combination of topics you like. - A huge number of fully-hinted questions that take you step-by-step through some of the trickiest calculations & concepts. - A comprehensive bank of past exam papers, organised both by year, and also by topic. Amadeus & Tom

[@Big_Topic]

Thank You!

[@jasminephillipson7421]

The animation and voiceover together make it so easy to understand.. :)

[@felixgillet8957]

Life Saver! I have my Physics Mock tomorrow and this is the one topic I dont understand !

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This video has helped me so much. Thank you! :)))

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very simple, straight to the point and flawless explanation.

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You ave a great skill of explaining things!

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Love your explanations, simple but they cover key facts. :)

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you explain great.. thank you.. i understood 2 topics from you.

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Love it. Made me understand the lesson 100% Thanks a ton 🙏🙏

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4:37 love the brief pause here

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Not me watching thhis hours before my physics exams

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I absolutely love your videos... Is it possible to make videos on alternators and dynamos?

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[@calcpost3641]

@Cognito thank you so much, finally beginning to understand this topic!

[@Cognitoedu]

You're welcome CalcPost, glad they're helping! 👍

[@calcpost3641]

@@Cognitoedu Sir when you say " a change in magnetic field' is that the same as the coil of wire cutting the magnetic field lines? or are they different.

[@finlaycoburn2120]

Love it! Very helpful thank you soooooo much!!!!!

[@finlaycoburn2120]

Yay

[@somyagarg2811]

Are you going to make/is there a video about the Alternator and the Dynamo?

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no he is not

[@xMurdererr]

⁠@@ChandanDas-gl7ijthere’s a non-video lesson on alternators and dynamos on the cognito website

[@mbt1845]

Hello! Thanks for the video. Very informative. When the conductor is completed to a circuit, and the circuit is moving up, the current should flow in the opposite direction that you are showing in the video.

[@YvesLuyens]

I agree with you, the negative charges are pushed to the opposite direction of the current, which means that the electrons are going from + to -. This induces e.m.f, just like a battery and in a battery, current flows from - to +

[@Zllilx]

tysm helped me to understand the concept

[@mahdirahman2006]

It helped a lot. Tnx a lot

[@el_tio_Harry]

Hi, In the video is the Postive and Negative conventional current or actual electron flow?

[@Amer-pp3ty]

this video is soooo helpful, thank you so much!

[@Cognitoedu]

You're so welcome Amer! 👍

[@mango-pb2fq]

thanks alot for this explanation good sir.

[@KK-sl5uz]

Can I please ask why the potential difference swap each time we move through the magnetic field? and how do it induces a potential difference when a wire cuts through it? Thank you so much!

[@streetwearstash5104]

Great video!

[@memoonaqamar6657]

Best physics channel

[@yvesluyens5427]

Hi, great video, however I have a doubt on the + - signs in the video, Using the right hand the direction of the current should point to the + side (we are in the source, so current goes from minus to plus) 😅😀

[@SuhailKhan-ts9yo]

this is sahel khan before the test, if you wish my luck, +10000 good deeds

[@ssgaming3238]

Thankyou too much it is helping me in my exams which Is tomorrow

[@jannatulnaima5238]

IDK WHY MY TEACHER CANT TEACH LIKE THIS TYSM FOR TEACHING US IN EASY WAY

[@DelayEdits]

This might sound be a very obvious answer to the question, since it is in the title, but this is this the same method in which a generator works? Just wanted to know so it will help me visualise it better 🙂🤘

[@parijat8166]

Yes! Since the potential difference keeps changing, an a.c (alternating) current is produced, and this is the current that is usually used in mains electricity, for example.

[@TejDhr]

Amazing explanation

[@muhammadzain4211]

HEY Cognito, I cannot Find the Right Hand rule on your channel please help me

[@mohammadsheryar6201]

Can you please make a video on alternator and dynamo

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i have my igcse's in 5 days , this really helped me a lot

[@theimperialfistsspacemarin3050]

Hope they go well mate, have my assessments on the 15th

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omg you saved my life tysm

[@rayenahmed5456]

oustanding explanation, thank you

[@Cognitoedu]

Glad it was helpful!

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[@kjgamingfun4208]

i love these videos i wish you were my teacher

[@johnnazar6516]

Might be a silly question, but does that mean there's no voltage in between the coiled wires.

[@whyyoulooking4944]

The movement of magnetic field lined induces an emf across the coil Emf means voltage

[@ninetnatanakrit9032]

Why does moving the wire upward and downloaded provides emf? And why does it swap every time it passes through the field?

[@moshi5613]

The wire cuts through the magnetic field lines and this is what induces a potential difference in the wire. That's why if the wire is not moving/the magnetic field is not changing, there is no induced p.d since it is not experiencing a change in the magnetic field. The seconf part is a little bit harder for me to explain since i'm not familliar with the concept but I believe that the direction of the emf opposes the polarity of the original magnetic field, depending on the direction the wire is moved in. Hopefully that helps a little bit.

[@user-ms9xd3pt5l]

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thx ily

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[@elisasee7538]

how do u know which way the current goes

[@simrankc6940]

use the right hand grip rule. finger points toward the north and fingers point in the direction of current slow.

[@puddleduck1405]

@@simrankc6940 thats the left hand rule

[@puddleduck1405]

use Fleming's left hand rule. Thumb is direction of force/wires, first is magnetic field direction (always from north to south) and second is the direction of current

[@kaltumaomar2823]

How do you know the direction the current will be flowing in?

[@sheikhheisen]

by using Fleming's Right Hand rule

[@simrankc6940]

@@sheikhheisen if ur using the first one, use right hand Fleming rule. if your usinga solenoid like the second type of induced emf, use the right hand grip rule :)

[@puddleduck1405]

@@sheikhheisen isn't it Fleming's left hand rule

[@zaidhashmi3357]

@@puddleduck1405 flemings left hand rule applies to the motor effect, this is the generator effect and uses the right hand rule

[@zaminabbas5288]

Thnx👌

[@slopherones7938]

bro made me understand the generator effect in 5 minutes...

[@unabr09]

Can I explain in exams with "voltage" and not potential difference?

[@nethminadithya6678]

Why an e.m.f is induced ?

[@andies9994]

may i ask why will the potential differences change when we move the magnet/coil ? thank you

[@ChandanDas-gl7ij]

no u may not

[@Live.SoapyYT]

Anybody revising?

[@ssgaming3238]

I am

[@chenyongyan6664]

I'm sorry, but what is direction of potential difference

[@ZainAli-xy8kd]

nice video dear

[@user-jq3qt8no7h]

What do u mean by induced?

[@ManLikeChoby]

caused

[@ahmadtheaviationlover1937]

This topic always gets me confused

[@abigailguessis1218]

So it’s a light switch

[@AshutoshSingh-dn9je]

arenu sure magnetic field dont make loops full video is great except that

[@nathanhall2804]

KSCS

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@Sorab Karim koolaid sings cool songs

[@Live.SoapyYT]

All the videos are similar. Wire. Magnets.

[@alishaanimations3058]

Change in magetic fiekd - pd Doesnt move? (Mf or wire) Mangetic field doesnt change therefore no pd P.d changes as we change direciton Flow of electrons - Current Tehrefore conect it in curcuit makes current

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I’m in year 7 0:09

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,❤️

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real

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Ya Ali AS

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who let bro cook???