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Voltage across R2 question?

The question is:
gcse-physics-notes-potential-dividers-html-m2d8df34f.gif

The supply voltage is 12v. R1=16 ohms and R2= 8 ohms. Calculate the voltage across R2. I really don't understand it! Do I need to work out total Voltage or what? I think I do because R2 leads to the Vout​ part, so do I? D; thanks!
It's in ratio.

Higher resistance needs more voltage.

So

16:8
2:1

And see how much each gets .

Or do you know the potential divider equation?
You already asked this here
http://www.thestudentroom.co.uk/showthread.php?t=2620738
and got the same answer.
There is no need to start a new thread.
Reply 3
Avatar for white_o
white_o
OP
17
Original post by L'Evil Fish
It's in ratio.

Higher resistance needs more voltage.

So

16:8
2:1

And see how much each gets .

Or do you know the potential divider equation?


ohh okay, and I'm not sure what is it? :P
Original post by Qaiys
ohh okay, and I'm not sure what is it? :P


You have two numbers that must add up to 12. (As I stated in the other thread.)
These two numbers must be in the ratio 2 to 1. (Also as I stated in the other thread and has been stated here too.)

What do you think?
(edited 10 years ago)
Reply 5
Avatar for white_o
white_o
OP
17
Original post by Stonebridge
You have two numbers that must add up to 12. (As I stated in the other thread.)
These two numbers must be in the ratio 2 to 1. (Also as I stated in the other thread and has been stated here too.)

What do you think?

Keep your wig on, I clearly didn't understand on the last thread so I wanted to make a new one? And the lesson and worksheet don't say anything about that, that's why I was/ am confused

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