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A steel wire 2 mm in diameter is just st...

A steel wire 2 mm in diameter is just stretched between two fixed points at a temperature of `20^(@)C.` If the temperature falls to `10^(@)C,` then the tension in the wire is (The coefficient of linear expansion of steel = `11xx10^(-6)//^(@)C` and Y for steel `2.1 xx10^(11)N//m^(2))`

A

7.25 N

B

725 N

C

72.5 N

D

`7.25 xx10^(3)N`

Text Solution

Verified by Experts

The correct Answer is:
C
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