A 1m long wire of diameter 0.31 mm has a resistance of 4.2Ω. If it is replaced by another wire of same material of length 1.5m and diameter 0.155 mm, then the resistance of wire is

Options

(a) 25.2Ω
(b) 0.6Ω
(c) 26.7Ω
(d) 0.8Ω

Correct Answer:

25.2Ω

Explanation:

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