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Q.

The force constant of a wire is k and that of another wire is 2k  When both the wires are stretched through same distance, then the work done

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a

W2=2W12

b

W2=2W1

c

W2=W1

d

W2=0.5W1

answer is B.

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Detailed Solution

W=12kx2If both wires are stretched through same distance then W∝k.  As  k2=2k1 so  W2=2W1
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