Four wires made of same material are stretched by the same load. Their dimensions are given belo...

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Four wires made of same material are stretched by the same load. Their dimensions are given below. The one which elongates more is
(a) Wire of length \( 1 \mathrm{~m} \) and diameter \( 1 \mathrm{~mm} \)
(b) Length \( 2 \mathrm{~m} \), diameter \( 2 \mathrm{~mm} \)
(c) Length \( 3 \mathrm{~m} \), diameter \( 3 \mathrm{~mm} \)
(d) Length \( 0.5 \mathrm{~m} \), diameter \( 0.5 \mathrm{~mm} \)
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