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Find the equivalent resistance between X and Y.(a) 3.33 ohm(b) 4.34 ohm(c) 5.65 ohm(d) 2.38 ohmI had been asked this question in an online quiz.The doubt is from Star Delta Transformation in portion Network Theorems of Basic Electrical Engineering

Answer»

Correct OPTION is (d) 2.38 ohm

For explanation: The 3 2ohm RESISTORS are connected in star, changing them to DELTA, we have R1=R2=R3= 2+2+2*2/2=6 ohm.

The 3 6ohm resistors are connected in parallel to the 10 ohm 5 ohm and 10ohm resistors respectively.

This network can be further reduced to a network consisting of a 3.75ohm and 2.73ohm resistor connected in series whose resultant is intern connected in parallel to the 3.75 ohm resistor.



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