Resistance of wire made of same materials is proportional to the length and inversely proportional to the square of radius. Twice the length would double the resistance and halving the diameter would make the resistance to increase 4 times. In totality the resistance will increase 8 times.
So, resistance of A: Resistance of B= 1:8
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Carrol answered this
The correct answer is - Both the wires will have same resistivity. Resistivity Or specific resistance depends on the material of the conductor. Since the material of both the wires a and B is copper their resistivity is also the same.
