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When a wire of uniform cross-section a, length l and resistance R is bent into a complete circle, resistance between two of diametrically opposite points will be
detailed solution
Correct option is A
When the wire is bent to form a complete circle, then2πr=R⇒r=R2πResistance of each semicircle=πr=πR2π=R2Thus, net resistance in parallel combination of two semicircular resistancesR'=R2 × R2 R2 + R2=R24R = R4Talk to our academic expert!
Similar Questions
A uniform wire of resistance 36 ohm is bent in the form of a circle as shown in fig The effective resistance across the points A and B is
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