Two wires of same diameter of the same material having the length l and 2l. If the force f is applied on each, the ratio of the work done in the two wires will be
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a
1 : 2
b
1 : 4
c
2 : 1
d
1 : 1
answer is A.
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Detailed Solution
W = 12Fl ∴W ∝l (F is constant)∴ W1W2 = l1l2 = l2l = 12