GCSE Physics - Alternating (AC) and Direct Current (DC) #21

This video covers:
- The difference between alternating current and direct current
- Voltage-time graphs
- Oscilloscopes

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]

Hi everyone - we just wanted to clear up a bit of potential confusion about whether UK voltage is 230V or 240V. *Be aware that at the time of writing you can give either figure in your exam and you'll get the mark.* Many resources will cite the UK voltage as 230V, however this isn't technically true. Historically, UK homes have been supplied with 240V, and EU homes have been supplied with 220V. In 2003, they 'harmonised' the voltages across the UK and EU, and so both were now labelled as 230V. However the actual voltage didn't change, but instead the official voltage requirements for any electrical goods made in the UK/EU were altered - so that they would work using voltages ranging from ~215V to ~250V - and work in both the EU and UK with no problems. It's nothing to worry about either way, but we hope this clears up any misunderstandings :)

[lewisbrown]

This dude is legit saving my GCSE's

[ujycvwh]

This guy teaches me better in two minutes than my physics teacher does in an hour

[boo]

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[Zach-qtnz]

omg you are the freaking best teacher I have ever had. Your explanations are so clear and easy to understand, same topic i spent hours on i understood in minutes. Am legit about to go into tears.

[michii]

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[gunakusal]

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[justsomenightowl]

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[talhaafzal]

Amazing! I've gone through all the much worthy praise in the comments section but my only question is how can you be so flawless and to the point in 2 minutes? Kudos, indeed!

[vt.physics]

Very useful video! My students always forget the difference between the two types of current!

[rsbxouk]

This channel saved my life several times 🙏

[karenmudzana]

what about the gold lesf electroscope ?

[demispov]

I am watching this an hour before my exams

[RandomBR-RLJoe]

How does AC look like in circuit? Does it go around the circuit and come back?

[oivjfci]

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[bikusmoto]

Why is AC better than DC for mains supply?

[princekaki]

it was very helpful i understand the topic better now

[LeoChaseTheMythMaster]

I always come here if I'm unsure about something.

[katierobinson]

Not me sitting my physics GCSE paper 2 in an hour and a half 💀💀

[nishtakasundass]

Ac of Nikola Tesla v/s Dc of Thomas Edison.
Am i right?