Question

Resistivity of a wire of metal A is twice the

resistivity of a wire of metal B and the radius

of wire of metal A is half the radius of wire of

metal B. What should the ratio of the length of

wires of metal A and B in order to have the

same resistance?

(1) 1: 8 (2) 8 : 1

(3) 1: 4 (4) 4 : 1​

Answer 1

hi there here's your answer

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