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Find the equivalent resistance between node 1 and node 2 in the star connected circuit shown below.

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Find the equivalent resistance between node 1 and node 2 in the star connected circuit shown below.

(a) 2

(b) 29

(c) 30

(d) 31

This question was addressed to me in unit test.

This intriguing question originated from Star-Delta Transformation in chapter Useful Theorems in Circuit Analysis of Network Theory

1 Answer

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The correct option is (b) 29

To elaborate: The equivalent resistance between node 1 and node 3 in the star connected circuit is R =(10×10+10×11+11×10)/11=29Ω.

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