A wire of resistance 20ohm is bent in form of a circle . what is the net resistance between its diameter
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As the wire is bent so the lenth of the diameter reduces to half. We know that resistance is directly proportional to length
Therefore, the two resistances 20/2 ohm will be in parallel.
effective resistance,
1/R = 1/10 + 1/10
1/R = 1/5
R = 5ohm
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