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A steel wire , of uniform area 2mm^2 , ...

A steel wire , of uniform area `2mm^2` , is heated up to `50^@C` and is stretched by tying its ends rigidly . The change in tension , when the temperature falls from `50^@C " to " 30^@C` is (Take `Y=2xx10^(11)Nm^(-2) , alpha=1.1xx10^(-5^@C-1))`

A

`1.5 xx10^(10)N`

B

5 N

C

88 N

D

`2.5 xx10^(-10) N`

Text Solution

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The correct Answer is:
C
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