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Question:

A uniform metallic wire has a resistance of 18Ω and is bent into an equilateral triangle. Then, the resistance between any two vertices of the triangle is?

4Ω

2Ω

8Ω

12Ω

Solution:

The correct option is C
4Ω
Req between any two vertex will be
1/Req = 1/6 + 1/12
==> Req = 4Ω.