GCSE Physics - How Transformers Work #82 

To the lovely people at Cognito, You have been a lifesaver for me and my friends during our GCSE’s this year. I don’t know what I would have done without your amazing videos that are so simple yet so unbelievably helpful to all. I cannot learn from textbooks or revision cards, so when it comes to doing past papers, I was getting really low marks due to my lack of understanding: you have changed that. Thank you so much for everything and I cannot give you all enough praises. YOU HAVE SAVED MY GCSE’S!!!! Thank you again and I love you all ❤❤❤

exam tomorrow 💪

doing my last gcse exam tomorrow and its physics. You have helped (including this video) through my entire gcse science curiculem. My teachers were unrealiable due to illness/ covid and then i found u. You saved my gcses and i will be forever thankful. Keep up the hard work and carry on helping other students.

Goodluck for paper 2 yalll💪💪💪💪

Dear Amadeus and Tom, I don't know if you'll see this comment but I wanted to thank you for your amazing and helpful science videos . They were a life saver for me , particularly for physics ! I'm a visual learner so your diagrams and clear explanations were perfect in helping me understand tricky content . You made science a lot easier for me and now that the only exam in my way is Physics Paper 2 , I couldn't turn a blind eye to your channel. Thank you for being a part of my GCSE triple science journey ! From Fatima, Yr11 P.s- I loved your website too , it was super useful !

This channel is a gold mine, it really helps me prepare for Physics csec thank you!

your videos are so frickin helpful ive got mocks next week and i didnt get this electricity chapter thank you so muchhh

Amazing how you seem to make confusing topics so much simpler. Great work 🙏

Ending my IGCSE exams today by watching this amazing informative video (Physics P2). Thanks team cognito❤️

3 hrs left 😍

Thanks for this! I was doing work on this and finished a few days ago. I'll go back (online Docs) and rewrite it! Thanks!

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_6.09 - it'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

Exam in just over an hour, here we go!

Thank you so much you made this topic much easier

Quick, straightforward, not wasting my time. Thank you.

ready for physics paper 2 💪💪

Watching 1 day before exam will say how it went tomorrow

I'm super pleased with this video. It explained not only **how** transformers work, but included the reasoning behind their design. I watched a similar video from FreeScienceLessons (don't get me wrong, I use that resource all the time!) but it didn't go in-depth as this one, I was asking the whole time **why** is it like that and what are the benefits of a transformer being like that. This gave me a better understanding, thank you.

To those to people who disliked this video, Did you really not like this video or did you just want people to notice you? Because seriously this video is one of the most helpful physics videos I have seen in a while.(yes I added a like.)

I love cognito sm omg idk how id survive my GCSEs

Exam in a couple of weeks this really helped me out i love you guys ❤❤😊

Thank you for all these great videos I have a lot to revise for my exams

Best video on Transformers!!

wow!... my book says a whole different equation to find the number of turns in the 2ndary coil even when the number of turns in the primary is given (when in fact its just half of the primary!)... this video opened my eyes!. too bad how our school system so badly wants us to fail by studying very complicating stuff in their textbooks while these videos exists!... THANK YOU! seriously

Cheers, my exams are in 3 weeks or so and this has definitely helped with one of the harder physics topics!

THANK YOU IT MAKES SO MUCH SENSE NOW!!

thanks for explaining it so simply!!

Thank you so much, it was a great help

Exam tomorrow

THANK YOU Helps understand the concept in simplified terms..

You explain wonderfully

Thank you so much it helped a lot

You deserve more people watching and subscribers

superb!

Thank you!

I've read that if the secondary coil is not there or in other words has an open circuit then this leads to the decrease of the current in the primary coil i don't know why the only reason i found was due to back emf generated due to self induction but i can't figure out why it decreases sooooo much and not just a little bit Help would be appreciated and Thank u all for your amazing help

best of luck everyone. thanks for everything Cognito.

THANK YOU SO MUCH

Thanks a lot!!! Love from Bangladesh❤

thank you so much, finally i understood it

Thanks a lot bro

Exam in 2 hrs

You're the best!!! You should be a scientist!

Superb video as always! Keep up the good work.

thank you so much

The underated side of RU-vid

Thank you sir

it took me thirty minutes to understand this shit... anyway thanks for the clear explanation my teacher has been explaining this for months now i finally get it...❤

Thanks for the video how does increasing voltage minimise energy loss?

Makes 100% sense

Exam today🤲

Do Decepticons work differently? Or do they work off the same concepts

Thank you

Physics paper 1 tomorrow good luck to my fellow year 11s 😭

The iron core can't be vital in the functioning as transformers can work (just not as well) even without it right?

Good night 💤

Dear Cognito, I love you

Exam today 😭😭

last exam today!!! 🦾

Thank you for saving me from getting beaten by my mother

1st view 1st comment and 1st like by the way video was awesome.

thanks

I understand how it increases voltage, but how does it decrease current at the same time?

O level exam in 1 hour 😮. Thanks for the help

Two questions: ONE if the transformer can be used in both directions, why labelling them "step up" and "step down" transformers? TWO now that many renewable generators are connected to low and medium voltage grids, how transformers will work if a given area has more power generated than load?

Tomorrow everyone skip the 6 markers because we have to show edexcel that we are independent.

This is rly helpful but when you said alternating "potential difference" did you actually mean alternating current?

this channel is so adorable

Is it possible for you to share the powerpoint of this video?

thanku sir

All hail Cognito

So it has nothing to do with solenoids?

Besssssst channnnel !!!!

can you do a video on dynamos & alternators pls

Exam morning guys

Hi, I didn't quite get how a potential difference is created within the primary coil. Could anyone explain, please?

I have my last exam in 10th grade tomorrow morning 🎉buy sophomore year and hello junior

I've got a question, what happens when a dc current is used? I got this question in a past paper and cant understand why it won't work.

what's the point of having a step up transformer and then having a step down one? I don't really understand it

Hey, I have a problem. What if there was a direct current applied across the primary coil?

but how does it induce the pd, its not the generator effect rite? cuz the wire or core isn't moving? I'm very lost :(

I don't get it, could you not just make an infinite amount of electricity this way since you arent actually losing anything, the secondary coil is just picking up the electromagnetic waves?

When he said straight passage, did he mean DC current?

Is secondary coil always that side?

coming back in y13 👍

amazig

Last GCSE exam after few hours!

2:43

Man there missing out at some key details tho, for e.g a transformer increases voltage at the cost of decreasing current which keeps overall power loss (formula P=I^2(R)) to a minimum, transformers dont generate power thier job is to transform current into voltage

Can we prepare for olevel from these videos plzz anyone help me to understand

Exam today..

Rollout

still no clue

May I know the exact meaning of “induced” please? I’ve been searching but I don’t understand what they explain. Please help me😭😭 Thank you

you are such a help to me

Lt❤

Exam today

I know how transformers work, they just become cars and can turn into robots...

Tmrw exam 🫡

EXAM AFTER 2 HOURS !!!