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JEE Main · 2021 · 31 Aug 2021 · Shift 1 · Current Electricity

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A square shaped wire with resistance of each side is bent to form a complete circle. The resistance between two diametrically opposite points of the circle in unit of will be _____.

Answer: 3

Solution

Bending the wire leaves its total resistance unchanged, so the circle carries around its circumference. Between two diametrically opposite points the two semicircular arcs, each , are in parallel:

JEE Main · 2021 · 31 Aug 2021 · Shift 1 · Integer answer

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