Question

a given length of a wire is doubled on itself and this process is repeated once again by what factor does the resistance of the wire change

Answer 1

Answer:

16 times the original resistance

Explanation:

Volume remains same ok then if length doubles then the radius becomes √2 times less hence area is halfed . R= pho × ( length/area ) so at first resistance increase by a factor of four and again so it becomes 4×4 of the original

Answer 2

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