If work done in stretching a wire by \( 1 \mathrm{~mm} \) is \( 2 \...

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If work done in stretching a wire by \( 1 \mathrm{~mm} \) is \( 2 \mathrm{~J} \), the work necessary for stretching another wire of same material, but with double the radius and half the length by \( 1 \mathrm{~mm} \) in joule is -
\( \mathrm{P} \)
(A) \( 1 / 4 \)
(B) 4
(C) 8
(D) 16
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