Question

Find the equivalent resistance at node C in the delta connected circuit shown below.

(a) 3.66

(b) 4.66

(c) 5.66

(d) 6.66

This question was posed to me in class test.

I'd like to ask this question from Star-Delta Transformation in chapter Useful Theorems in Circuit Analysis of Network Theory

Answer 1

Right option is (b) 4.66

The explanation is: Performing delta to star transformation we obtain the equivalent resistance at node A is  R =(12×13)/(11+12+13)=4.66Ω.