Hello everyone I got my my exam in circuits and I have come across a pretty tricky delta - Y conversion question. I understand how to do these conversions and all that but this question has me confused and I dont know if I am heading in the right direction or not. I have provided the question and a pic of some of the work I've done. If somebody cause please provide a solution to this problem that would be great as this is the only question on the entire review I don't get and my exam is tommorow morning!

I have gotten it down to something that looks like a T circuit but then I am not sure how to calculate Rin and Rout, I have like 6 pieces of scrap paper beside me of attempts of trying to figure this out and its really starting to strees and demoralize me....please help!

Thanks in advance!

 

Your work is virtually illegible.

In any case there are a couple of simple reductions which you may have already included.

R7, R8 and R10 are in parallel. Also R6 & R9 are in parallel. So these are immediately reducible without recourse to Delta-Wye reduction. R3, R4 & R5 are an obvious candidate for Y-Δ.

 

Since you are so close to an exam I'll attach a solution for the reduction to a 'T' form.

 

Oh my god you are my hero! thank you so much!