Hello
I've been doing some revision of my own for OCR module P6, and I'd appreciate it if somebody could check the answer to just this one question so that I can check I'm not doing it all wrong! I can't find an answer booklet online, and there aren't any answers in the online textbook either
A 100Ω resistor and a 200Ω resistor are used in a potential divider circuit. When the supply voltage is 12V, what is the voltage across the 200Ω resistor (R
2)?
I did this:
(200/300)*12=8 (the voltage out)
12-8=4
Therefore voltage across R
2 is 4V.
Was I right or wrong? If I was wrong can you explain how I should have done it please? I've tried googling to check but my search remains fruitless!
Thankyou