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[" 70.Two wires of same diameter of the ...

[" 70.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 "],[[" (a) "1:2," (b) "1:4],[" (c) "2:1," (d) "1:1]]

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