The dimensions of four wires of the same material are given below. In which wire the increase in...

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The dimensions of four wires of the same material are given below. In which wire the increase in length will be maximum when the same tension is applied [NCERT 1976; IIT 1981;
CPMT 1983, 90; MP PET 1989, 90, 99; MP PMT 1992, 94, 97; MP PET/PMT 1998; WB-JEE 2012;
Similar AFMC 1997; NEET 2013]
(a) Length \( 100 \mathrm{~cm} \), Diameter \( 1 \mathrm{~mm} \)
(b) Length \( 200 \mathrm{~cm} \), Diameter \( 2 \mathrm{~mm} \)
(c) Length \( 300 \mathrm{~cm} \), Diameter \( 3 \mathrm{~mm} \)
(d) Length \( 50 \mathrm{~cm} \), Diameter \( 0.5 \mathrm{~mm} \)
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