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A steel wire 2mm in diameter is stretche...

A steel wire 2mm in diameter is stretched between two clamps, when its temperature is `40^@C` Calculate the tension in the wire, when its temperature falls to `30^@C` Given, coefficient Y for steel ` = 21 xx 10^(11) dyn e//cm^2`, coefficient for steel= 11 x 10^(-6).

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The correct Answer is:
`7.26 xx 10^(6)` dyne
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