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+2 votes
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in Physics by (175 points)
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A uniform metallic wire has resistance of 18 ohms and is bent into an equilateral triangle

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Here wire is bent in equilateral triangle , so side contain 6 ohm resistance.

Thus equivalent resistance of parallel combination of resistance 12 ohm and 6 ohm =12*6/(12+6) = 72/18 = 4 ohm .

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