Physics
posted by struggling student .
A series combination of two resistors of resistance 12 Ù and 8 Ù is connected across a source of emf 24 V. What is the potential difference across 8 Ù resistors?
Do you know the formula for this?

Yes, I know the formula. It is called Ohm's Law.
Why do you write "8 Ohm resistors" if there is only one of them? 
That's my point, this is the exact question and i don't understand it. I didn't write 8 ohm resistors, my book did. Do you understand what they're asking?
thanks 
There are four possible answers:
9.6V
14.4V
20V
24V 
I=U/(R1+R2) =2.4/(12+8) =1.2 A,
U1= I•R1= 1.2•8 = 9.6 V,
U2= I •R2=1.2•12=14.4 V.