A piece of wire of resistance 4 ohm bent in the form of circle then resistance diametrically
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Well it forms two parallel wires each half the resistance of 4 so 2 ohms each.
But they are connected in parallel and as they are both identical you can just half the 2 ohm value to 1 ohm.
That's a tricky question and I am not 100% sure I have done it right!
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