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A wire of resistance 12 ohms 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
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- 3 Ω
- 6 π Ω
- 6 Ω
- 0.6 π Ω
Correct Option: A
The resistance of length 2πR is 12Ω. Hence the resistance of length πR is 6Ω. Thus two resistances of 6Ω can be represented as shown in fig. 2.
| ∴Equivalent resistance R = | 6 × 6 | = 3 Ω |
| 12 |
