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[" 2.A wire whose cross- sectional area ...

[" 2.A wire whose cross- sectional area is "4mm^(2)" is stretched by "0.1mm" by a "],[" certain load.If a similar wire of double the area of cross - section is under "],[" the same load,then the elongation would be "],[[" 1) "0.5mm," 2) "0.05mm," (3) "0.005mm," (1) "5mm]]

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