Why Is My Calculation of Voltage Over 1.5R x R Incorrect?

[faen]

Homework Statement

Can somebody please explain to me what i did wrong here? Got exam tomorrow and it would probably be usefull to know.. Thx

Homework Equations

axb = a*b/(a+b)

The Attempt at a Solution

First i tried finding the voltage over 1.5R x R.. Then divide that voltage over R to find the current over R... For some strange reason this is wrong. Plz someone help me to understand why..

 

[kentigens]

treat the 1.5R and R as parallel. then in series with the 0.6R to get the overall resistance. current going through 0.6R = voltage/overall R. Then the same current split into the 1.5R and R, calculate.

 

[faen]

nice, thanks a lot. Now i got further :)

However if u would be able to point out what i assumed wrong in my first attempt itd be apreciated as well, so i don't happen to do a similar mistake again

 

[kentigens]

hmm... its like really basic. just get familar with kirchhoffs v and i law. u'll be fine

 

[DeeNos]

It seems like you may have made a mistake in your calculation for finding the voltage over 1.5R x R. It would be helpful if you could share your specific calculations so that I can better understand where the error may have occurred. Additionally, it may be helpful to review the basic principles of electric circuits and Ohm's Law to ensure that you are approaching the problem correctly. I recommend practicing some sample problems to build your understanding and confidence before your exam tomorrow. Good luck!