Question

A wire of resistance 20ohm is bent in form of a circle . what is the net resistance between its diameter

Answer 1

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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