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If an 8/9ohm, 4/3ohm and 2/3ohm resistor is connected in star, find its delta equivalent.(a) 4ohm, 3ohm, 2ohm(b) 1ohm, 3ohm, 2ohm(c) 4ohm, 1ohm, 2ohm(d) 4ohm, 3ohm, 1ohmThe question was posed to me in a job interview.This question is from Star Delta Transformation in portion Network Theorems of Basic Electrical Engineering

Answer»

The CORRECT option is (a) 4ohm, 3OHM, 2ohm

To ELABORATE: Using the FORMULA for the star to delta conversion:

R1=8/9+4/3+(8/9)*(4/3)/(2/3)

R2=8/9+2/3+(8/9)*(2/3)/(4/3)

R3=2/3+4/3+(2/3)*(4/3)/(8/9).



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