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A brass wire 1.8 m long at 27^(@)C is he...

A brass wire `1.8 m` long at `27^(@)C` is held taut with little tension between two rigid supports. If the wire cooled to a temperature of `-39^(@)C`, what is the tension developed in the wire, if its diameter is `2.0 mm`? Coefficient of linear expansion of brass `= 2.0 xx 10^(-5)//^(@)C`, Young's modulus of brass `= 0.91 xx 10^(11) Pa`.

A

`3.8xx10N`

B

`3.7xx10^2N`

C

`3.7xx10N`

D

`3.8xx10^2N`

Text Solution

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The correct Answer is:
B
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