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JEE Main 2025 (28 Jan, Shift 1) · Combination of Resistors

Combination of Resistors question from JEE Main 2025 (28 Jan, Shift 1)

Q12JEE Main 2025 · 28 JAN · SHIFT 1Medium

Combination of Resistors

A wire of resistance R is bent into an equilateral triangle and an identical wire is bent into a square. The ratio of resistance between the two end points of an edge of the triangle to that of the square is

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Answer: (c)

Triangle edge: $\dfrac{R}{3} \parallel \dfrac{2R}{3} = \dfrac{2R}{9}$ .
Square edge: $\dfrac{R}{4} \parallel \dfrac{3R}{4} = \dfrac{3R}{16}$ .
Ratio $= \dfrac{2/9}{3/16} = \dfrac{32}{27}$
So the answer is (c) $32/27$ .

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