Question

If a 6 ohm, 2ohm and 4ohm resistor is connected in delta, find the equivalent star connection.

(a) 1ohm, 2ohm, 3ohm

(b) 2ohm, 4ohm, 7ohm

(c) 5ohm, 4ohm, 2ohm

(d) 1ohm, 2ohm, 2/3ohm

I have been asked this question during a job interview.

My query is from Delta Star Transformation in division Network Theorems of Basic Electrical Engineering

Answer 1

Correct answer is (d) 1ohm, 2ohm, 2/3ohm

Easiest explanation: Using the delta to star conversion formula:

R1=2*6/(2+6+4)

R2=2*4/(2+6+4)

R3=4*6/(2+6+4).