Question

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Masses of three pieces of wires made of
the same metal are in the ratio 1:3:5 and
their lengths are in the ratio 5:3:1. The
ratios of their resistances are
(A) 1:3:5 . (B) 5:3:1
(C) 1:15:125 (D) 125:15:1​

Answer 1

Answer:

1. C is the answer ! I think because ∆R/R =2∆L/L