RE-NEET 2024 Physics Resistance MCQ Question
A uniform metal wire of length l has 10 Ω resistance. Now this wire is stretched to a length 2l and then bent to form a perfect circle. The equivalent resistance across any arbitrary diameter of that circle is:
10 Ω
5 Ω
40 Ω
20 Ω
Correct Answer
Detailed Explanation
When the wire is stretched and bent into a circle, the resistance across a diameter is half the total resistance of the circle, which remains 10 Ω.
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