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[" 4.The workdone in increasing the leng...

[" 4.The workdone in increasing the length of a one "],[" metre long wire of cross-sectional area "1mm^(2)],[" through "1mm" will be "(Y=2times10^(11)Nm^(-2))],[[" (A) "0.1J," (B) "5J],[" (C) "10J," (D) "250J]]

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