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A metal wire of resistance 3 Ω is elongated to make a uniform wire of double its previous length. This new wire is now bent and the ends joined to make a circle. If two points on this circle make an angle 60° at the centre, the equivalent resistance between these two points will be :

1. 2 5 Ω
2. 3 5 Ω
3. 2 7 Ω
4. 5 12 Ω

Correct answer: 3 5 Ω

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