A tungsten wire, 0.5 mm in diameter, is ...

A tungsten wire, 0.5 mm in diameter, is just stretched between two fixed points at a temperature of `40^@C` . Determine the tension in the wire when the temperature falls to `20^@C` . (coefficient of linear expansion of tungsten = `4.5 xx 10^(-6)//""^@C`, Young's modulus of tungsten = `3.45 xx 10^11Nm^(-2)` )

6.097N

3.097N

5.097N

7.097N

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