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Question

A wire of 10 ohms is bent to form a closed circle.what is the resistance across a diameter of the circle?

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Solution

The length of the wire between two points at the end of a diameter will be half of the complete circular wire. Resistance of wire between two points = 10/2 = 5

The two sections is R eq,

we have
1/Req = 1/5 + 1/5 = 2/5

Req = 2.5

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