GCSE Physics - Plugs and Wires #22

This video covers:
- What mains supply is
- The roles and colours of the live, neutral and earth wires
- Why plugs can give you an electric shock
General info:
- Suitable for all GCSE and IGCSE courses
- Suitable for higher and foundation tiers
- Suitable for triple and combined science
Exam board specific info:
AQA - Everything is relevant to your course!
IGCSE Edexcel - Everything is relevant to your course!
Edexcel - Everything is relevant to your course!
OCR 21st Century - Everything is relevant to your course!
OCR Gateway - Everything is relevant to your course!

[@Cognitoedu]

If you’d like to practise the material covered in this video, check out our platform at www.cognitoedu.org - 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

[@tgt7413]

The best thing of these videos is that they are short but contain a lot of information in a simple way so that everyone can understand

[@smile-jc6um]

Conclusion
Live wire: , brown, 230 volts, carries current into socket
Earth wire: , greeen + yellow 0 volts- alternative pathway for current if live wire is loose (in order to not shock us)
Neutral wire- blue - 0 volts, carries current out of socket

[@arafsadiq9825]

Nice re-use of the LHS rule hand drawings. Great video! Really appreciate it! These videos are single-handedly saving my exams

[@Cognitoedu]

Glad you like them Araf 😊

[@jking4444]

I re-wired my hedge strimmer plug. It didn't have an earth wire but did have a fuse.

[@Mdzzzzmahamed2255]

I’m late but noiiiiiiiice I passed 🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉❤❤❤❤❤❤❤❤❤❤

[@maisiexo7112]

saved my physics gcse thx

[@universeusa]

Thanks a million!!!!!!!

[@Cognitoedu]

You’re very welcome Jake - thanks for the support 🙌

[@hamzalag2006]

Great video.

[@farzanakhan2533]

Very informative👌

[@jameswinstanley1162]

Why does the neutral wire have 0V when there is still a current flowing through it?

[@nishtakasundass6669]

Actually it takes V to start the current flow, but once the current is flowing, no V is needed for current to continue flowing.

[@jeannedarc7533]

@@nishtakasundass6669 Thanks :)

[@Asuna-zr8de]

thanks a lot your videoes are sososo clear and effective btw can CAIE exam board be include too pls pls pls

[@philipbrady7635]

extremely useful

[@hongjoongswife9672]

So the three core cable is located inside the plug?
And if i said the connection of an appliance to the main supply requires a three core cable, is that correct?

[@Cognitoedu]

Yup! :)

[@paulaherne3915]

Actually most items only have two wires in the BS-1363 plug. Earthing only occurs with things like kettles, electric heaters and other items without double-insulation.

[@marcusbutcher9574]

Thank you

[@tancebekie408]

Wouldnt the current when it reverses direction. It moves from the neutral to the live wire is that correct

[@baburlu]

So a current flows from where there's a high voltage to low voltage?

[@kingjarif4182]

yeah u r correct my g.

[@jeannedarc7533]

2:12
But what if that happens with the earth wire too :/

[@noynay6600]

Nice video 😅

[@master4755]

One thing I would say to improve the video is the mentioning of the fuse and the purpose of it. So as you discuss the earth wire and how it provides an alternative option for current to flow , the 0V of the earth wire causes a large current and therefore heating which melts the fuse and breaks the circuit
Good Video anyways!

[@Cognitoedu]

That’s a great a point cheers, would have been good! We cover fuses in a different video though - th-cam.com/video/S8lB2kxT1n0/w-d-xo.html

[@master4755]

@@Cognitoedu Oh I didn't see that thanks!

[@QwertyUiop-ct9dr]

y is the alternating current 240 volts in the last vid and 230 volts in this vid??? which one is it??

[@Cognitoedu]

Hey - go with 230V for all your exams! :)

[@hackuloexpi3946]

This may sound like a dumb question, but i was wondering if touching the neutral wire is dangerous as it has 0 volts?

[@corcerercr7606]

It would probably be safe but don't try it. At least I wouldn't

[@user-xu2uo4qq9m]

"neutral"

[@jessicawatson7391]

okay so in science in lesson for chemistry we wired plugs and we learn about fuses and got told that if it didn't work the fuse blew up and stopped it working and that has happened to my hair dryer before but i turned it off again and turned it back on and it was as good as new and is the earth wire dangerous even if it has 0 volts going through it or is completely safe?anyone answer

[@jessicawatson7391]

anyone answer asap please

[@pipper5612]

Who names their child cognito?

[@felixsanderson4627]

@@chiefexecutive1989 Who names their child chief executive

[@Arb294]

Who even have names

[@PalashPatil-ik3hj]

3:33

[@APXTydem]

shout out miss whittington

[@gamer_ksa9517]

Ok

[@valtrek868]

1kth like

[@suckmydick2996]

Anyone watching from school

[@felixsanderson4627]

why the hell is your name that, it's a good way to get your account banned

[@suckmydick2996]

@@felixsanderson4627 lol I don’t care

[@felixsanderson4627]

Get on with your work beetroot

[@suckmydick2996]

@@felixsanderson4627 I’d rather not Felix sandyman

[@spooderspider]

i am lmao

[@max1in10]

Hi Arthur

[@pipper5612]

I’m not Arthur

[@realitycheck3361]

@@pipper5612 he did not mean you, he meant the youtuber.

[@rorysimpson1277]

hi

[@mourn379]

wat

[@abubakarkhan8310]

my teacher said to watch it i dont understanc a word

[@kingjarif4182]

y not its very simple topic..

[@Arb294]

Read the textbook :)