STANDARD Physics Resistance in Circuits MCQ Question
A wire of resistance 12 Ω per meter 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
3 Ω
6π Ω
6 Ω
0.6π Ω
Correct Answer
Detailed Explanation
Wire of length 2π × 0.1 m of 12.2 Ω m⁻¹ is bent to a circle. Resistance of each part = 12 × π × 0.1 = 1.2 π Ω. Since upper and lower part of the wire are in parallel connection, total resistance = 0.6π Ω.
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