Internal Resistance and How to Measure it - A Level Physics

This video introduces and explains internal resistance as well as how to measure it for A Level Physics.

Battery and power sources are made of 'stuff' which have their own internal resistance, which we call 'r'. The internal resistance of a battery or a cell is often ignored but sometimes it can't be. Here I show what it looks like if you look inside a battery (you probably shouldn't try this at home - there could be all sorts of dangerous chemicals). I also show you how to measure internal resistance as well as how to calculate internal resistance.

Thanks for watching,

Lewis

This video is recommended for anyone studying A Level Physics in the following exam boards:
AQA
CIE
Edexcel
Edexcel IAL
Eduqas
IB
OCR A
OCR B
WJEC

_____________________________________

MY PHYSICS WEBSITES
Find even more videos organised by exam board and topic at:

GCSE Physics Online
A Level Physics Online

MY YOUTUBE CHANNEL
Your support in watching this video has been invaluable! To contribute towards the free videos on YouTube, make a small donation at:

FOLLOW ME

#resistance #alevelphysics #physicsonline

[aye]

that is great to review the basics of elec course

[aimeestevenson]

these videos have really helped me with my exam tomorrow- thankyou!

[alexkarolyi]

those battery cells look delicious just saying, but anyway very helpful vid ty!

[sabiurbishal]

i really like your videos .. its easy to understand A level physics lectures over here .. :)

[zahidkhattak]

Please keep posting more videos. Thankyou!

[bishnu]

How does Terminal PD get reduced when greater I is withdrawn? V=IR, so if I is greater, the V should also be greater. It doesn't make sense to me. Please explain me this one

[matthewsinglehurst]

Could you use a multimeter to find the internal resistance of the battery using the resistance setting?

[urvahtauseef]

why is V/I not equal to R(external resistance) since V is actually the p.d across the resistor?

[eloisecp]

One thing I don't understand is the terminal p.d. Is the terminal p.d the same across the variable resistor?