A wire of resistance 12Ω m − 1 is bent to form a complete circle of radius 10 cm . The resistance between its two diametrically opposite points, A and B as shown in the figure, is NEET 2009 (Screening

Question

A wire of resistance 12Ω m − 1 is bent to form a complete circle of radius 10 cm . The resistance between its two diametrically opposite points, A and B as shown in the figure, is NEET 2009 (Screening)

TestHub · Accepted Answer

. Circumference of circle = 2 × π 100 10 ​ = 10 2 π ​ = 5 π ​ Resistance of wire = 12 × 5 π ​ = 5 12 π ​ Resistance of each section = 10 12 π ​ Ω ∴ Equivalent resistance = 10 12 π ​ + 10 12 π ​ 10 12 π ​ × 10 12 π ​ ​ = 10 6 π ​ = 0.6 π Ω

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